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Model AF6
VHF-FN Radiotelephone
Instruction Manual
3 apelco MARINE ELECTRONICS
676 ISLAND POND ROAD
: MANCHESTER, NEW HAMPSHIRE 03103
Doc. No. 983433 (First Printing July 1978)
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Apeleo Marine Electronies warrants all parts of each new product against defects in material and
workmanship under normal use, and will repair or exchange any parts proven to be defective at no
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charge for a period of TWO YEARS from the date of original installation, EXCEPT AS PROVIDED
BELOW.
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Defects will be corrected by an authorized Apeleo Marine Electronics Service Station. There will
be no charge for labor for a period of ONE YEAR from date of original installation, EXCEPT AS
PROVIDED BELOW.
BE
WARRANTY LIMITATIONS
Apelco Marine Electronics will not be responsible for equipment which has been subjected to
accident, abuse, or misuse, nor any equipment on which the serial plate has been removed, altered, or
mutilated.
Except where Apelco Marine Electronics has performed the installation, it assumes no responsi-
bility for damage incurred during installation.
This warranty is effective only with respect to the original purchaser from an authorized Apelco
Marine.Electronics Representative.
A validated warranty certificate and station logbook (if applicable) must be made available to the
authorized Apelco Marine Electronics Service Station at the time of service.
Chart paper, stylii, stylus belts, lamps, and fuses‘are consumable items, and are not covered by
this warranty.
Any cost associated with transducer replacement, other than the cost of the transducer itself, is
specifically excluded from this warranty.
Equipment must be forwarded to an authorized Service Station at owner's expense, and will be
returned at no cost to the owner.
Apelco Marine Electronics equipment or parts thereof which have been repaired or altered outside
of its plant except by authorized Apelco Marine Electronics Service Stations are not warranted in any
respect.
This warranty is STRICTLY LIMITED to the terms indicated herein, and no other express
warranties or remedies thereunder shall be binding on Apelco Marine Electronics. TO THE EXTENT
CONSISTENT WITH STATE AND FEDERAL LAW. (1) ANY IMPLIED WARRANTIES SHALL BE
LIMITED TO THE SAME TIME PERIODS STATED HEREIN FOREXPRESS WARRANTIES,
AND (2) APELCO MARINE ELECTRONICS SHALL NOT BE LIABLE FOR CONSEQUENTIAL
] DAMAGES UNDER ANY EXPRESS OR IMPLIED WARRANTIES RELATING TO THIS
EQUIPMENT.
APELCO MARINE ELECTRONICS
676 Island Pond Road, Manchester, New Hampshire 03103
NOTE: THE SAMPLE WARRANTY STATEMENT IS
FURNISHED FOR REFERENCE ONLY,
PLEASE REFER TO THE WARRANTY CER-
TIFICATE ISSUED WITH YOUR EQUIPMENT
FOR SPECIFIC TERMS AND CONDITIONS,
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TABLE OF CONTENTS
- Page
SECTION 1 INTRODUCTION
peas General Descriptions. d 2.5 eee 1~1
bea: SPOCHICMIAGHS eT! fo. -24 tae cern ee Spe: ded
R POSE SECTION 2 OPERATION
P U oa om. Controlete BwrtCnesue nn ores ott 2-1
2ee Operating Instructions...2... Bee 2-2
2S) Battery Requirementac. 15. <c... ae 2-2
THIS MANUAL CONTAINS IMPORTANT INFORMATION ON THE INSTALLATION,
OPERATION AND MAINTENANCE OF YOUR EQUIPMENT. SECTION 3 RADIOTELEPHONE SERVICES
oul Basic Radiotelephone Service...... 2 3-1
Se Getting on the Air... .< AE ee ee a 3-1 j
Sos Technical, Requirements....... See Sri ig
APELCO MARINE ELECTRONICS products are supported by a worldwide network aaa Register with the Coast Station...... 3-2 a
of Authorized Service Representatives. owe Marine Radiotelephone........... bavi SS :
; ; : ee 326 Distress, Urgency and.Safety, ... 25 3-5 f
The below-listed Apelco Marine Electronics Factory Service Centers will either Messages ;
assist you directly, or refer you to an Authorized Service Representative. 37 Wooster Rincon dencte ot” EEE Phan ea '
ooo Keeping: the (Logie: ieee eee ek -
329 Phonetic Alphabet...... oe ae ee 3-7 ;
y SERVICE CENTERS SECTION 4 THEORY -@F OPERATION :
FAC 4.1 Receiver...... « pighs See epee ee ae am ms 4-1
4.2 ‘Transmitters 2 eer See oe Smee 4-2 k
CALIFORNIA: NEW HAMPSHIRE: VIRGINIA: i
633 N. Marine Avenue 25 Industrial Village 6529 Tidewater Drive SHES UIOUNE “SS MAINTENANCE rt
Wilmington, Ca. 90744 Londonderry, N.H. 03053 Norfolk, Va. 23509 f
(Los Angeles) (Manchester) Phone: (804) 857-0178 Sie General...... TEN 0 os OE Bae 5-1 k
Phone: (213) 835-0147 Phone: (603) 668-1600 Dad Tools and Equipment..... 6 ee 5-1 G
cure. ROCOIVOR: sos sae ee echo weeny aaaans a2
FLORIDA: NEW YORK: WASHINGTON: pe Transmitter Alignment... isu. 618 sous 5-4
1107 N. Ward Street, 756 Sth Avenue 4800 20th Ave. NW
Tampa, Fl. 33607 Brooklyn, N.Y. 11232 Seattle, Wa. 98107 SECTION’ 6 PARTS Listes CHENS 1 TG. eee or 6-2
Phone: (813) 877-9418 Phone: (212) 768-2511 Phone: (206) 782-0242 ;
#
LOUISIANA: TEXAS: S
525 Jefferson Street 1203 Galveston Street ;
New Orleans, La. 70121 South Houston, Tx. 77587
Phone: (504) 835-6491 Phone: (713) 941-2700
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ETS or ILLUSTRATIONS SEOTION 1
Fig. No. Title Page INTRODUCTION
os} Operator ‘Controls and Indicators.... 2-3 1.4 GENERAL DESCRIPTION
A-1 Block Diagram, Model AF6.......---- 4-4 Rew
5-1 Equipment Set-up, Deceiver: Aligninent ee The AF6 VHE/FM marine transceiver is an entirely self-
5-2 Bouepmeny seer aba PEANSMatier s+ ~~~ as contained radio which provides the safety and convenience of
Alignment [Ay ae ae 56 VHE marine communications in one compact unit. It is ideal
nae Components Adjusted Toy a ie - for small craft which do not have power sources, for harbor
Alignment . ee ee = 64 communications, and for low power/short distance ship to
5-4 Components Adjusted ior ts bee ie shore use.
: Aone (Crystal Oscillator PC Board)
. Pes mitt ae ‘ ' ‘ . : a
5.5 Components Adjusted for Transmitter = 9-8 It is designed to perform reliably in harsh marine conditions.
Alignment (Main ie Board) eS ade Crystals are supplied for channels 06 and 16. The AF6 will
5-6 Components Adjusted tor ree ets ay is operate from AA cells, 12 VDC external power source, or an
= ae I — aan optional rechargeable power pack.
| i SPECIFICATIONS
General
LIST OF TABLES Dimensions 216mm (H) x 87mm (W) x 47mm (D)
bl Title Page COB x SA ee
Table Ue ——
i ee ice ae 5-10 Weight Approx. ck w/rechargeable
as ara no. ransist RGus IRAN ONE 555 eee nour power pac E
6-1 Ie (oes al CS. ar ey Gre : :
: Power requirement 12 VDC a
Current Drain Transmit: approx. 380mA @ 12 VDC |
Receive: Max. audio output 100mA t
@12 VDE \
Stand-by: Squelch on, 20mA @ :
12 VDC
be Power Source 8AA penlight cells, or optional
rechargeable power pack
Channels 6, crystals for 06 and 16 supplied
Output impedance 50 ohms nominal
Frequency range ~ 156 to 162 MHz
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Circuit system
Crystals
Nominal RF output
Frequency multiplication
Frequency stability
Max. frequency
deviation
TX audio frequency
response
Minimum signal/noise
ratio
-_
Spurious and harmonic
suppression
Audio filter
Receiver
Circuit system
Crystals
Frequency stability
Sensitivity:
20 dB noise
quieting
12 dB SINAD
Modulation acceptance
Selectivity
pute) exe» 1.0)
Crystal-controlled, phase
modulation
HC-25 holder
Dwg. No. 983533
1 watt (13.6 VDC input)
12 times
#10 x 10°° from -20°C to +50°C
ambient temperature (10 to 14 VDC)
+5 kHz (frequency modulation)
Within +1 dB and -3 dB of true
6 dB per octave, pre-emphasis
iromes0Oenz to 3000: Hz
At least 35 dB below Eee ade by
deviation at 1 kHz
Exceeds FCC and DOC requirements
Exceeds FCC and DOC requirements
Crystal-controlled, double
conversion superheterodyne
HC-25 holder
Dwg. No. 983534
“8 from -20°C to 50°C
ambient temperature (10 to 14 VDC)
Better than 0.5 uV
Better than 0.4 uV
More than -7 kHz (EIA)
More than 70 dB @ 20 kHz (20 dB
quieting method): Exceeds FCC
and DOC requirements
eZ
ice SPECIFICATIONS Cecur)
Spurious and image
response
Squelch sensitivity
Adjacent channel
selectivity
Intermodulation
Audio frequency
response
Audio output power
60 dB below rated _ sensitivity:
Exceeds FCC and DOC requirements
Noise compensated type: 0.3 uV
threshold; below 2 uV with full
squelch
Two signal generator method: better
than 65 dB @ 25 kHz
55 dB (EIA SINAD, three generator
method)
Exceeds FCC & DOC requirements
Within +2 dB and -8 dB of true
6 dB per octave, de-emphasis
from 300 to 3000 Hz
More than 1/2 watt with less than
10% distortion
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SECTION 2
OPERATION
2a CONTROLS & SWITCHES
CHANNEL Selector - Place the dial on the channel you wish to
use. Channel 16 is the emergency channel. It is also used
for calling. Channel 6 is for intership safety/search and
rescue.
ON/OFF Switch - Turns the power on and off.
Volume (VOL) Control - Rotate clockwise for loudness.
Squelch (SQ) Control - Quiets the receiver when Signals are not
being received and allows quiet standby operation. It operates
only in the receive mode and does not affect the receiver volume.
Rotate the control clockwise until the receiver is just quieted
when no signal is being received. Incoming signals will auto-
matically release the squelch. Careful adjustment is necessary.
Setting the control too far clockwise will not allow weaker signals
to release the squelch.
Meter - Transmit: Indicates battery voltage
Receive: Indicates signal strength
Telescoping Antenna - Pull the antenna up for transmitting or
receiving.
External Antenna Jack - An HMB plug connector is required for
this jack.
Transmit/Receive - Depress this button to transmit. Release it
to receive.
ee OPERATING INSTRUCTIONS
Teri To Receive:
1. Rotate the VOL control clockwise and adjust for a
comtortable listening level.
2. Set the CHANNEL selector to the desired operating
channel and readjust the VOL control as necessary.
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Daoak To Receive (cont)
3. Adjust the Squelch control ae Se ae! the a ae
background noise is just quieted. This shou e done Tt. Bntenne re
when there are no signals being received. It is impor- - Antenna Jack Switch
tant that this control be adjusted just to the threshold
point so that weak signals will still be audible. When a
transmission is received, it will release the squelch
circuit, allowing the signal to be heard. Squelch Channel
Bowe To Transmit: Volume me
1. Select the desired channel and listen carefully
fo assure thet iieaeenot busy. If it is busy, -you
will hear voices or an intermittent busy tone for Audio
some Marine Operator channels. Do not interrupt Volume
unless an emergency situation exists. tee
Transmitting Voltage
2. If the channel is clear, press the push-to-talk and Receive Signal
button on the side of the radio to activate the Transmit/ La Strength Indicator
transmitter. Announce the name of the craft Receive —s
you are calling and its call letters followed by the Switch .
name of your craft and your call letters. Release
the push-to-talk button to receive a reply. At the Int. Speaker
end of the conversation, announce that you are
signing of and again give the name and call letters
of your crath. Microphone
Your transmitter is in operation only when the push-to-talk
button is depressed and only then can others hear you. The
receiver functions only when the button is released, and only
then can you hear others.
es BATTERY REQUIREMENT
Eight AA penlight cells (alkaline last longer than standard dry Battery Case
cells) must be installed in the battery pack included with the
radio. Earphone
Jack
A heavy duty rechargeable: battery pack is available as an option.
For best results, recharge the rechargeable battery pack after
about 14 hours of continuous use, or when the voltage at the
terminal of the pack reaches 10V. Pxt. DGis seem
12V Jack
and, 2-3
SECTION 3
RADIOTELEPHONE SERVICES
ipa! BASIC RADIOTELEPHONE SERVICE
Radiotelephone communication capability provides important
benefits of safety and convenience. It is possible to call, or
be called by, the Coast Guard or other vessels within range.
San GETTING ON THE AIR
Before a vessel can lawfully transmit any message, with or
without the assistance of a Marine Telephone Operator, the
FCC requires that the following be on board:
1. A-valid ship's radiotelephone station license
2. A radiotelephone operator with valid license or
permit
3. A radiotelephone station log book
Federal Communication Commission regulations prohibit the
use of profane language, and establish other reasonable
controls. All persons aboard a vessel who will be using its
communications equipment should be familiar with these and
with approved operating procedures. Frequencies are shared
with other boatmen. Contact should be kept brief so that all
may have an equal opportunity to transmit and _ receive
messages.
Se) TECHNICAL REQUIREMENTS
The Telephone Company (or independent common carrier)
operates shore-based radio stations for interconnection with the
telephone network. It does not rent, lease or sell radiotelephone
equipment for use aboard ship. Such equipment is owned and
maintained by the boat owner or, in some cases, by a maritime
radio operating company. The selection, installation, and
maintenance of a shipboard radio station is highly technical and
should be entrusted only to licensed, reliable marine radio
service technicians.
The owner's service requirements and the operating area
will determine the type of marine telephone service and
the specific installation needed. Transmitters must meet the
requirements set forth in the Regulations applicable in the
country in which the ship is registered. Vessels of United
States registry must conform to the regulations of the FCC.
i
F
i
NOT EE LL I LENTIL IN
oe LSS a Ves Lee
oe REGISTER WITH THE COAST STATION
If regular use of Public Marine Radiotelephone Service is
planned, it is important to register with the owner of the
coast station serving the primary area of operation. Registra-
tion with Bell System stations is free. It provides the coast
station with billing information’ for calls, and saves the air
time necessary to transmit this information on each call.
For information on Bell System Marine services, or to register
a vessel, call the Telephone Company representative in your
area.
Atlanta, GA 404-877-3895 Milwaukee, WI 414-350-8870
Baltimore, MD 301-393-1036 Montreal, Canada 514-870-7189
Birmingham, AL 205-321-8509 Newark, NJ 201-649-2014
Boston, MA 617-743-4035 New Orleans, LA 904-581-7337
Charleston, SC 803-722-9011 New York, NY 212-564-0410
Charlotte, NC 704-372-9456 212-393-7394
Chicago, IL 312-727-1574 Norfolk, VA 804-424-9911
Cincinnati, OH 513-397-3431 Omaha, NB 402-422-8656
Cleveland, OH 216-822-4840 Philadelphia, PA 215-466-4648
Detroit, MI 313-354-9550 Portland, OR 503-224-6261
Houston, TX 713-521-6355 San Francisco,CA 415-986-5216
713-521-7708 415-442-2262
Indianapolis, IN 317-630-1697 Seattle, WA 206-345-2341
Jacksonville, FL 904-353-2315 Washington, DC 202-392-3682
Los Angeles, CA 213-744-1616 202-637-9900
Miami, FL 305-379-0745 Wilmington, NC 919-763-4675
305-350-8026
NOTE
Keep the Telephone Company in-
formed of any changes that affect
your registration.
re MARINE RADIOTELEPHONE
The Bell System and numerous independent common carriers
maintain a network of marine radio stations strategically
located along the coastal waters and major inland waterways
ot tne. =46. \ €ondiquousiestates:,, of »the,:.U.S. Stations are
generally operated around the clock.
VHF Service
Public Class I1I-B Coast Stations
This service offers reliable operation with good trans-
mission quality over distances of 20 to 50 miles, using
FM with channels in the 156 MHz to 162 MHz range.
Antenna height and equipment quality are the primary
factors that determine communication range.
VHF Channels
There are 29 noncommercial VHF channels available
in the United States. They are grouped into categories
for specific uses so that maximum utilization with mini-
mum interference can be attained. A listing by category
may be found in Table 3-1.
Channels for use only by commercial vessels are: 7, 8,
10,11, 18, 195 6%. 77, 792 60 seneseee-c aanneisweron
International use only are: 1, 2, 3, 4, 5, and 78:
Placing Calls on VHF/Ship-to-Shore
a. Listen to verify that channel of desired station is
not busy.
b. When channel is clear, call desired station and
announce your vessel name and call sign - repeat
at intervals until Operator answers.
c. When the Marine Operator answers, say: "This
is (Ship Call Signal), the telephone billing number
iS ceaee ". If there is no telephone billing number,
state caller's name, ship's name and address in
the port of registry.
d. Finish up with the city and telephone number
being called. Proceed thereafter as directed.
e. At the end of the conversation, repeat ship's
name and call sign and sign off with "clear" or
Noue
Placing Shore-to-Ship Calls
a. Call the local telephone operator and ask for the
Marine Operator.
b. Give the Marine Operator the name of the ship
being called, its call sign, location, and selective
signaling code number (if applicable). Proceed
thereafter as directed.
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Recelving Shore-to-Ship Calls
To receive public coast station calls, a receiver must
be in operation on the proper channel.
When calling on VHF, Bell System coast stations will
generally call on their assigned channel frequency.
On coastal harbor frequencies, Bell System coast sta-
tions normally call on a working channel of the coast
Station, but will call on the distress frequency, Chan-
nel 16 (156.8 MHz), when requested to do so by the
calling party.
Since it is mandatory for commercial] operators to main-
tain a watch on Channel 16 (156.8 MHz), many commer-
cial operators carry an additional receiver tuned to a
working frequency of their area coast station. This
enables them to receive a high percentage of calls on
the first attempt.
When you hear your boat called, answer as follows:
(Name of coast station that called) "This is (Name of
your vessel and all sign), Over". Proceed there-
after as directed.
Ship-to-Ship Direct
Direct ship-to-ship contacts are originated on the dis-
tress calling and safety frequency - Channel 16
(156.8 MHz)
a. On Channel 16, monitor to establish that no other
communications will be disrupted, especially rescue
or safety. Give the name of the vessel being
called, and the name and call sign of the calling
vessel.
b. When the called vessel answers, it should sug-
gest an. intership frequency on which to complete
the conversation. Conversations should be limited
to 3 minutes except in emergencies.
c. When the call is complete, sign off with vessel
name and call sign. You may not call the same
boat again for at least 10 minutes.
d. Return your receiver to distress, safety, and
calling, Channel 16.
3-4
oe DISTRESS, URGENCY AND SAFETY MESSAGES
it the radiotelephone is turned on, and not in use, it should be
monitoring the calling and safety frequency (Channel 16). This
channel is monitored 24 hours a day by the Coast Guard and
most commercial shore Stations. If help is needed, it can be
on its way in moments from the Coast Guard and other vessels
in the area.
Distress, urgency and safety me€ssages are identified by a code
word at the beginning of each message. This word indicates the
priority of the message.
3.6.1 Distress Signal: MAYDAY
Used only if there is an immediate danger of loss of life or pro-
perty. MAYDAY has priority over all other communications.
ik If a MAYDAY is Heard
Immediately discontinue any transmission. Note the
details of the message in the radio log immediately .
A call to relay information or render assistance may
be received. Having the facts may make it possible’
to help save a vessel or a life.
Unless you are in a position to render assistance and
are requested to do so, or you are the only receiver
of the call, do not make any transmissions on this
channel until the MAYDAY condition is lifted by the
Coast Guard.
2. To Make a MAYDAY Call
a. Switch to Channel 16 (156.8 MHz)
NOTE
Because the Primary purpose of the
channel is to summon help, it is likely
that an immediate response will be re-
ceived. If not, repeat the message. lf
still no reply, transmit on any other
available frequency until contact is made.
Dp Speaking slowly and distinctly, say "MAYDAY,
MAYDAY, MAYDAY. DES hae a Is giving the
name of your vessel and call sign three times.
Then continue with the distress message, as
follows, — still] speaking slowly and distinctly.
C. Name of the calling vessel.
d. Position (or best estimate).
f. Description of vessel (type, color, length, number
of persons aboard, etc.),
g. Indicate end of message by saying "Over".
RES
>
BUYENCY es OIGNdal: FAN
Used when the safety of a vessel or person is in jeopardy. "Man
overboard" messages are sent with this urgency signal. PAN has
priority over all other communications with the exception of
distress traffic.
Snb23 Safety Signal: SECURITY
Used for messages concerning the safety of navigation and trans-
mission of important meteorological warnings.
Buf WEATHER BROADCASTS
Coast Guard stations transmit weather information in many areas.
Local frequencies and schedules may be obtained from the nearest
Environmental Science Services Administration (ESSA) office. The
U.S. Weather Bureau broadcasts current weather on channels W1
(162.55 MHz), W2 (162.40 MHz), and W3 (6254 75° Miz yee The
Canadian weather braodcast frequency is 161.650 MHz.
At some shore stations; the Marine Operator broadcasts weather
information. The Marine Operator may be consulted for channels
used and time schedule of broadcasts. Commercial braodcasting
Stations generally braodcast weather reports and forecasts as
part of their news coverage.
NOTE
No prudent boatman ventures out of port
without the best available Knowledge of
weather conditions and _ possible changes.
Your radiotelephone can help you obtain this
important information.
rs) KEEPING THELOG
NOTE
Radiotelephone logs must be retained for at
least one year, and for three years if they
contain entries concerning marine disaster or
distress. This period may be longer if an
investigation is underway or pending.
5-6
‘he FCC requires the following entries in a radiotelephone log
1 Name of vessel.
2. Vessel's call sign.
3. Operator's signature.
4 Date and listening time on Channel 16 (156.8 MHz)
using the 24 hour clock.
5. All distress (MAYDAY) messages heard or transmitted.
6. All urgency (PAN) and safety (SECURITY) messages
transmitted.
7. Distress, urgency, and safety messages should be
logged in as much detail as possible, including date,
time of day, operating frequencies, vessel's name and
position, and nature of emergency.
8. All installation, service, and maintenance details that
affect the operation of the transmitter must be entered
by the licensed technician performing such work, in-
cluding his address and the class, serial number and
expiration date of his license.
oye, PHONETIC ALPHABET
To help make call letters more clearly understood, and to assist
in spelling out similar-sounding or unfamiliar words, radiotele-
phone users usually employ the international phonetic alphabet,
as shown below.
PHONETIC ALPHABET
Ae=-ALPHA oO Ee S - SIERRA
B= BRAVO K = se® T= "TANGO
C= CHARLIE L - LIMA U - UNIFORM
De=DEiers M - MIKE V..= NICTOR
E,. = ECHO N - NOVEMBER W - WHISKEY
Fo FOXTROT OS OSCAR ere ne
Gi GE P-PALE Yo= YANKES
ee SOLES Q = QUEBEC A
I - INDIA R - ROMEO
RULES TO REMEMBER
YOUR RADIO CAN MEAN YOUR SAFE ARRIVAL - USE IT WITH
RESPECT.
The following are some important points of proper usage
recommended by the Radio Technical Commission for Marine
Services, Washington, D.C. Numbers in parentheses refer to
paragraphs in FCC Rules, Part 83.
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BE SURE TO GIVE NAME AND POSTION OF Spans neal If you hear a MAYDAY call, respond only he ine oa position to
render assistance or relay the distress message.
Emergency Situations
a. False distress signals are prohibited. Violation, under FCC
Distress MAYDAY-MAYDAY-MAYDAY regulations, may result in a maximum fine of $10,000 and impri-
sonment up to two years.
Urgency message concerning
safety of vessel or person(s) PAN-PAN-PAN Keep your radiotelephone equipment in good working order. Have
es it checked periodically by a qualified, licensed technician.
Safety of navigation or
important weather infor- ; Radiotelephone messages, like telephone conversations, are
mation SECURITY-SECURITY-SECURITY private. It is unlawful to make use of any information not
; intended for you.
te Maintain Your Watch Listen to channel 16 when not in
communication with another vessel
CFCC tRules Part’ 63.223)
Ue Listen Before You Talk Avoid interference with calls in
progress (83.181)
3.. Identify Your Vessel Give your call sign and vessel name
at beginning and end of each
communication (83.364)).
4. Make Calls Correctly Call other vessels on channel 16 then
witch to intership channel (83.366).
Call public shore stations, in general,
on an appropriate working channe!
(83.366).
5. Use Channels Properly Channel 16 for emergencies and
brief calls and replies (83.353).
Intership (channel 6) for safety,
operational or business communi-
cations (83.358).
6. Watch Your Language Use of profane or obscene language
is a criminal offense.
a: Be Brief At All Times Limit calls to 30 seconds; Conversa-
‘ tions to 3 minutes (83.366).
8. Keep An Accurate Log Make entries as required by (83.366).
9. Have Documents Handy Ship Station License: Operator
License or permit; Part 83 of FCC
Rules; Log Book (83.3670).
If both VHF and MF (single sideband) radiotelephones are ins- “¢
talled, VHF must be used whenever within VHF range. This is
required by FCC regulations.
et o-9
SECTION 4
THEORY OF OPERATION
4.1 RECEIVER
The receiver is a dual-conversation superheterodyne, receiving
signals’ irom "156. 275-Ste “163-o75-. we on SIX channels. ~ The
operating channel is determined by channel selector switch S003
which provides the first local oscillater frequency. A variable
squelch circuit is included to quiet the receiver between trans-
missions.
In the receive mode, 12 VDC is supplied tc 1C201, TR212, and
the crystal oscillator PC board. The received signal passes
through the PTT switch, S002, to the first BF amplifier, FET201.
The amplified RF signal then goes to the second RF amplifier,
PET202. From FET202 the amplified RF is applied to the first
receiver mixer, FET203.
When S003 is turned to any channel, it selects both the transmit
crystal and the receive crystal for that particular channel. For
example, when channel one is selected, the operating frequency
of “crystal X201 is applied t6 the first oscillator,’ TR201. The
output of TR201, 48.5333 MHz, is applied to the base of multiplier
TR202 which multiplies the frequency three times to 145.5999 Miz.
The output of TR202 is applied to the first mixer, FET203, along
with the received RF signal. After mixing and converting, a
10.7 MHz first IF signal is yielded. The IF signal is passed
through a 10.7 Muy2 bandpass filter, BPF-1, to eliminate any
Spurious noise, and is then appiled to the second mixer, FET204.
The second oscillator, composed of TR203 and X207, generates a
frequency of 10.245 Mite cr 11.755 Miz. This frequency is
applied to FET204 along with the first IF, for mixing and con-
verting. The output of FET204 ic @ 455 bus second IF. The
second IF is then passed through a ceramic filter, BPF-2, and is
applied to the first, Seconds. and sosind air amplifiers, TR204,
205 and 206. The amplified second IF signal is then applied to
the limiter, TR207. From the luniter theesienal ie passed to
amplifier TR208, and then to discriminator DISC201. The de-
tected audio signal next passes through volume contrc!, VROO1,
and is applied to the audio amplifier, IC201. The amplified audio
signal is then applied to the speaker:
In the absence of signals, high frequency noise passes through
the squelch control, VRO02, and is applied to the first noise
amplifier, TR209. The amplified noise is applied to the second
noise amplifier, TR210, then to the noise detector, D209 and
D210. The resulting DC voltage is applied to the DC switch,
TR211, and turns it on. When TR211 turns on, it grounds the
4-1
bias circuit of audio amplifier IC201, and turns it off until an
audio signal is received. This will cause [C201 to turn back on.
4.2 TRANSMITTER
When the PTT switch, S002, is pushed, the receiver is discon-
nected from the antenna and power is disconnected from the re-
ceiver voltage stabilizer, TR212. Power is supplied through
S002 to the transmitter voltage stabilizer, TR113, and then to
the various components of the transmitter. When the crystal
for 156.3 MHz is inserted in the channel 1 crystal holder, the
crystal, in conjunction with the transmitter oscillator, RT101,
will generate a frequency of 13.025 MHz. This frequency is
applied to one side of the phase modulator, D107 and D108.
At the same time, an audio signal from the microphone is applied
to the first and second transmit audio amplifiers, TR109 and
TR110. The amplified audio is then applied to the audio clipper,
Dl1il and D112. The clipped audio is applied to the third trans-
mit audio amplifier, TR111. The amplified audio goes through
the low pass filter, TR112, for pre-emphasis shaping.
The audio is applied to the phase modulator, D107 and D108,
where it is used to modulate the oscillator frequency from oscil-
lator TR101. The output signal from the phase modulator,
D107 and D108, is equivalent to a frequency-modulated signal
because of the pre-emphasized audio supplied by TR112. The
modulated signal is then applied to the first multiplier, TR102,
where it is multiplied three times to yield a frequency of 39.075
MHz. The 39.075 MHz signal goes to the second multiplier,
TR103, where it is multiplied two times for a frequency of 78.15
MHz. From TR102, the signal goes to the third multiplier,
TR104, and is multiplied twice for a final frequency of 156.3 MHz.
The 156.3 MHz phase-modulated signal is then applied to the
pre-driver, TR105, where it is amplified. The amplified signal
is then applied to driver TR106. From TR106 the signal is
applied to power amplifier TR107. TR107 is a current ampli-
fier and raises the output signal sufficiently to give 1.0 watt
output at the antenna.
The final output signal is passed through the tank circuit
composed (Or f4a5toeC149, VC108.-.VC109 and: L113 to®Li15.
It is then applied to the antenna.
An automatic power control, TR108, is provided to prevent more
than 1 watt of power from being transmitted. A degenerative
feedback path from the collector of the power amplifier, TR107,
to the APC, TR108, allows excessive power output to be detected
by D109 and D110, which is then fed to the base of TR108.
4-2
TR108 acts as a bias controller for TR104, TR105 and TR106.
When excessive power is detected, TR108 lowers the bias voltage
on the affected amplifiers which lowers their outputs.
When in the transmit mode, the front panel meter indicates
battery strength. In the receive mode, the meter indicates
relative received signal strength. In transmit, the battery line
voltage is detected by D115 and is applied to the meter. In
receive, the amplified IF signal is taken off the collector of
TR206 and detected by meter detectors D213 and D214. The
detected voltage is then amplified by DC amplifier TR213
whose output is applied to the meter.
The voltage stabilizers, TR113 for the transmit circuit, and
TR212 for the receive circuit, are automatic voltage regulators
for the various components. The zener diodes in their base
circuits provide reference voltages for the regulators.
a
|
| FILTER |
J
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| mac
SPR
LOW
w{ PAS
CRIM.
$C20)
2)
a
Le
SECTION 5
| oisc2d
fh
|
433 KHy
MAINTENANCE
TRIO?
AUDIO
AMP
TRIOS
Ne wee me ee
Decl: GENERAL
POWER Amp 1}
TR208
AMPLIFIER
[aS gina eta a
\sf
AMPLIFIER
i These procedures must be followed to properly align the AF6
it Radiotelephone. Alignment should not undertaken unless the
f technician has adequate test euqipment and a full understanding
| of the circuitry of the transceiver.
445 KH
DRIVER
AMP
2nd AUDIO
fea
rr)
Les
=
ay
The procedures are divided into two main sections: Receiver
Alignment and Transmitter Alignment. Refer to paragraph 5.2
for a complete list of tools and equipment.
Baas tages a)
Loe
ra
a ee ae
poten
IF AMPS
2
a)
v
°
N
fog
i
455 KHr
AUDIO
BPF-2
CLIPPER
Om, one
These procedures assume that voltages are present at all points.
If not, troubleshoot before continuing.
poof
PRE-DRIVER
fear wera |
|
|
L
DETECTOR
0209,0210
WARNING
ot-8 DO NOT USE MERCURY BATTERIES. THE
POTENTIAL DANGER IS TOO GREAT. THE
USE OF THE CHARGER WITH MERCURY,
10 245 MHr
|
|
-
FET 204
TR203
7
I
|
—-—-—---—
2nd OSC
2nd RECEIVE
AMP
TRIN
3rd
3rd AUDIO
po--ccer
ALKALINE OR DRY CELL BATTERIES COULD
RESULT IN A VIOLENT EXPLOSION. USE
THE CHARGER ONLY WITH A RECHARGEA-
BLE. BATTERY PACK INSTALLED.
Pe ars eerie ta |
reas
|
te MULTIPLIER
2nd NOISE
10 7 MMe
|
te
th
KH
fe
BPF-|
|
|
cal
1O7 MMe
2nd
MULTIPLIER
(x2)
TRIOS
NOTE
fe me Ong al
| a}
ea
RA
al
The ferrite cores in the tuning coils are
easily chipped or broken. Always use care
when inserting an alignment too! in the tuning
coil: insert it straight into the core.
Ist RECEIVE
FET 203
Ist
(x3)
TRIO2
scak a arieaae
One TOOLS AND EQUIPMENT
hoe
MULTIPLIER
gvoc
The following tools and equipment are recommended for use in
aligning the AF6 transceiver. :
Sa)
PHASE lean}
MODULATORI “> MULTIPLIER
|
i}
| 0107, 0106
ape sis ar: |
|
!
1. VTVM, DC and RF with a probe not to exceed 1 pF
in capacitance.
2. RF power meter, 150 MHz, 2 watts, 50 ohms
3. Battery pack or 12 VDC power supply
4. Oscilloscope, 50 MHz with a 10:1 probe not to exceed
i 7 pF in capacitance
5. 1 kHz audio generator
6. Frequency meter or frequency counter, 150 MHz
7. Signal generator, 150 MHz, 50 ohms
8. Transformer, 600 ohms to 32 ohms
H+ 9 voc
|
J
5
|
let OSC
TR201
em
ly WW
On
CaN
E2
ja
Oa
Se
wn
VOLTAGE
STABILIZER
TRUS
TRANSMITTER
cr
Pa
TRANSMIT
OSC
Tans sae
(hens
ANT
ie
$003
jm ovo
Figure 4-1 Block Diagram, Model AF6 Radiotelephone
All test equipment must be properly calibrated.
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ans
NOTE
Test Voltage is 13.6 VDC.
Refer to Figure 5-1 for test equipment setup.
Sas RECEIVER
Refer to Figures 5-3 and 5-4 for the location of components to
be adjusted for receiver alignment.
sod Receiver Alignment
1. Connect an oscilloscope to the emitter of R203.
2. Measure 0.4V peak to peak at 10.245 MHz or 11.155 MHz.
3. Connect a signal generator to the gate of FET203. The
generator must be DC isolated. Set the signal genera-
tor to 10.7 MHz.
NOTE
This alignment should be performed with an
extremely small signal input from the signal
generator to prevent saturation of the IF
stages.
4. Connect the probe of the oscilloscope to P201.
9. Alternately adjust L209, L210 and L211 until the peaks
and valleys of the oscilloscope waveform are minimal
and amplitude is maximum (limiting).
Limiter Alignment
1. Connect the oscilloscope probe to the external speaker
Jack J002. Connect the signal generator output, set
exactly at 10.7 MHz, modulated at 1 kHz, 3 kHz devia-
tion to the gate of FET203.
2. Adjust L212 for maximum audio ‘sine wave output.
First Oscillator Ali nment
1. Connect the RF probe of an RF VTVM to the gate of
‘ane Be
2. Adjust L207 and L208 until the VTVM indication is
maximum.
3. Connect the cable of the frequency counter to the gate
of FET203 with a 5 pF capacitor.
4. Adjust the trimmer (VC201 through VC206). of the
desired channel until the frequency reading is within
SA0O Zs
NOTE
This is best set with a modulated gene-
rator for a better sine wave output (in
lieu of a zeroable discriminator).
FREQUENCY
COUNTER
SIGNAL
GENERATOR
TRANSCEIVER
TRANSFORMER
600 ohms: 32 ohms
OSCILLOSCOPE
Figure 5-1 Equipment Setup, Receiver Alignment
Sy re| RF Alignment
1. Connect the signal generator to the external antenna
jack, J001, and set the signal generator to the desired
frequency.
2. Connect the oscilloscope probe to P201.
elon en pm yeni Pt rete 3 f
bE lS)
“Eee ojecez ret es
Ta) Boye
iscK IRIS"
PoUUSc! +)
ks yee! RF Alignment (cont) 54.3
3 Adjust L20P, 12027 1.203. L204, L205 and L206 until the
output waveform is maximum. ie
4, Repeat the above adjustment two or three times, keeping
the generator level low to prevent limiting. 7
O74 TRANSMITTER ALIGNMENT
Refer to Figures 5-5 and 5-6 for the location of components to be oe
adjusted for transmitter alignment.
Sed d Voltage Stabilizer Check
1. Connect the DC probe of the VTVM to the emitter of e
TRS:
: 9.4.4
2. Press the PTT switch and measure OV.
ee oe Transmitter RF Alignment a
aR ee
1. Connect an oscilloscope to the base of TR102. 2.
2. Measure 0.4V peak to peak.
3. Connect the DC probe of a VTVM to P102 and press
the PTT switch.
4. Adjust L101 and L102 until the meter indication is
maximum.
2. Connect the DC probe of the VTVM to P103 and adjust
L103 and L104 until the meter indication is maximum.
6. Connect the probe of the VTVM to P104 and adjust L105
and L106 until the meter indication is maximum.
7. Connect the Dc probe of the VTVM to P105 and adjust
OSCILLOSCOPE
FREQUENCY
L107 and L108 until the meter indication is maximum.
Joo! :
\ Ss | |
| arr | | ) ® Es 3 | TRANSCEIVER
© |
POWER METER
COUNTER
Figure 5-2 Equipment Setup, Transmitter Alignment
Transmitter Modulator Alignment
Connect an oscilloscope and deviation meter to the
attenuator at the external antenna jack, JOO1.
Apply a 1000 Hz audio signal to the microphone and
check the waveform.
The microphone preamplifier, VR101, is preset for
average voice characteristics. Should excessive noise
be noted in transmission, reduce the gain. If weak
voice transmission occurs, increase the gain.
Adjust VR102 for a frequency deviation not to exceed
25 KHZ.
Frequency Aliqnment
Connect the cable of the frequency counter to the
external antenna jack JO01.
Adjust the desired channel frequency trimmer, VC101
through VC106, until the frequency reading is within
+200 Hz.
5-5
SOs
0 90K
HESS 209[]
he 1204/0 | L208
= fT ea
Teele romcd Oo a
DT
>
2 *@
Tie Joly or hie
L210
: ant 1209/5]
: aie
10 C420) 8 CHI0S
HYS*AL/0$C
ON
rat)
Figure 5-3
Components Adjusted for Receiver Alignment
(Main PC Board)
5-6
O
06 €) ro)
=>
ou VE206[© =
5 ox] ve20s[© =
Os o=] v¥c204[ © a
vcC203[ © oe
(Of yvero2l@ =
mn Gr: ©
ve201/© =
a=
O cxsecr O =e
Q
O
o
O
x10
TO R107 & CIOS
ON M4iN PC BOARD
TO CH2C2 & 285
ON MAIN PC BOARD
TO R227 BC234
ON MAIN PC BOARC
Figure 5-4 Components Adjusted for Receiver
(Crystal Oscillator PC Board)
Alignment
is
tN Tae ee oot
| eemaaes “ee a
MT AM
i
SSS
[o Mos ,
a ais } | ace
TP103 ata : iD 3
fo] = <7
ae ey, 80
LIOS x
LiC6 <2
TP104 ‘ ss =x
"L107 ae a
ey.
TP105 ae }
Gs r+) i
2 2 |
= el
1} oe,
eee ll | ]
| i
can " |
. '
° | i
GB) | sat
Le
ee ee
Figure 5-5 Components Adjusted for Transmitter Alignment
(Main PC Board)
3-6
4) ©
BATTERY
CONTACT
Uijessfes
BATTERY
PACK
10 RIO? & C109
ON MAIN OC BOARD
TO CH202 & 285
ON MAIN PC BOARD
TO R227 B C234
ON MAIN PC BOARC
Figure 5-6 Components Adjusted for Transmitter Alignment
(Crystal Oscillator PC Board)
wk Bia
G8. hr ve
TRANSISTOR VOLTAGE TABLE TRANSISTOR VOLTAGE TABLE (cont)
Symbol No.
ERLOL Rx
‘Sy
TR102 Rx
Tee RAS
TR103 Rx
dhe
TR104 RX
ex
TR105 Rx
lise
TR106 RX
1s
TR107 Rx
UBS
TR108 Rx
cles
TR109 Rx
Ato
TR110 Rx
ue
JiRalala Rx
Thx
BGR a2 Rx
les
TR113 Rx
alex
TR201 Rx
Nob
TR202 Rx
AB
TR203 Rx
1x
TR204 RX
TS
TR205 ex
Hex
TR206 Rx
CBs.
TR207 Rx
BS
TR208 Rx
fk
TR209 IR
aise
TR210 Rx
dibs
pee dal Rx
SECTION 6
PARTS. LIST & SCHEMATIC
Section 6 contains the schematic diagram and parts list for the
AF6. Parts having a Raytheon part number listed may be
ordered through Raytheon. Parts that do not have a Raytheon
part number are common items that may be obtained wherever
available.
—————— ee
S Sn AE he Rl
eM or eee
eee te
5 te tah pe ihe oh a
i ' OP a §
Table 6-1 AF6 Parts List (2 of 11)
Pablere-Ly AFG: Parts List (1 of 11)
4 Main P.C. Board Reference
Symbol Description Part Number
Reference ‘ ‘
Symbol Description C14 10) pF 20.5 pF, o0V ,CERAMIEe
——_ =a er C150 1000 pF ,+20%, 50V, CERAMIC
BPF201 BAND PASS FILTER (10C1KC) 983448-37 ' CES. 1000 pF ,+20%,50V, CERAMIC
BPF202 BAND PASS FILTER (EFC-L455K11D) 983448-38 Cls2 10 uP, 16V ELECTROLYTIC
C109 1000 pF,+20%,50V, CERAMIC CE53 1000 pF ,+20%,50V ,CLRAMIC
CLE@ 150 pF ,+20%,50V, CERAMIC C154 fOr LP L6VSELEC BROLY TiC
C111 330 pF ,+10%,125V, POLYSTYRENE C155 1 uF ,50V, ELECTROLYTIC
Cii2 1000 pF,+10%,50V, CERAMIC C156 1000 pF ,+20%,50V,CERAMIC
tas 22 pF ,+5%,50V, CERAMIC CST Fs SOV. ELGd in Oia wea
| C114 1000 pF, 20%,50V,CERAMIC C158 1000 pF ,+20%,50V,CERAMIC
CALS 3 pF,50V, CERAMIC G50 .O1 ur ,220%,50V ,MYLAR
| C116 1000 pF ,+20%,50V, CERAMIC C160 022 uF, +20%,50V,MYLAR
cay 22 pF ,+5%,50V, CERAMIC C161 LAL SOURELECTROLYTI
C118 1000 pF ,+20%,50V,CERAMIC C162 1000 pF ,+20%,50V,CERAMIC
| C119 4700 pF, +20%,50V,CERAMIC C163 Kad, tae ees Sea
C120 1000 pF,+20%.50V, CERAMIC C164 1 uF ,50V,ELECTROLYTIC
C21 27 pF, +5%,50V, CERAMIC C165 BI00 Gere Orn ae
Cr (NOT USED) C166 3300 pF ,+20%,50V,MYLAR
C23 (NOT USED) OLOer 4700 pr ,4£20%,50V ,MYLAR
/ CI24 3 pE 20825 pF,50V,CERAMIC C168 3300 pF ,+20%,50V ,MYLAR
C125 47 pF,+5%,50V. CERAMIC Ci69 1 UP SOV ALE EO PROM EK
: C126 100 pF ,+5%,50V, CERAMIC C170 1000 pF ,+20%,50V,CERAMIC
C127 4700 pF ,+20%,50V , CERAMIC sisal 10 uF ,16V ,LLLICTROLYTIC
C128 1000 pF ,+20%,50V, CERAMIC C213 33 pF, +5%,50V, CERAMIC
7 Was) 15 pF ,#5%,50V, CERAMIC Cah 18 pl 7255, 00 , CERAMIC
C130 2 pF,+0.25 pF.50V. CERAMIC C215 5 pF,+0.25 pF,50V,CERAMIC
C131 33 pF, 45%, 50V. CERAMIC C216 i pY,£0.25 pF ,50V,, CERAMIC
C132 47 pF, +5%.50V.CERAMIC C217 7 pF 40.25 pF,50V,CERAMIC
C133 1000 pF ,+20%,50V,CERAMIC C2lé 1000 pL ,+20%,50V,CERAMIC
C134 1000 pF ,+20%,50V,CERAMIC C219 1000 pF ,+20%,50V ,CERAMIC
C135 1000 pF, +20%,.50V. CERAMIC cP 1000 pF ,+20%,50V,CLERAMIC
C136 10 pF, +5%,50V,CERAMIC C221 7 pF,40.25 pF,50V,CERAMIC
C137 1 pF, 0.25 pF,50V,CERAMIC Oe pr ,40.25 pF ,50V,CLRAMIC
C138 15 pF,45%,50V. CERAMIC C223 7 pF,+0.25 pF,50V,CERAMIC
C139 47 pF,45%.50V,CERAMIC C224 100 pF ,420%,50V, CERAMIC
C140 1000 pF ,+20%,50V,CERAMIC C225 100 pF ,#20%,50V,CERAMIC
| C141 1000 pF,#20%/50V CERAMIC C226 100 pF ,420%,50V,CERAMIC
| C142 15 pF,+5%.50V, CERAMIC C227 7 pF,#0.25 pF,S0V,CERAMIC
| C143 27 pF, +10%,50V. CERAMIC C228 1 pF,#0.25 pF,S0V,CERAMIC
| C144 5 pF,+0.25 pF, 50V.CERAMIC C229 5 pF,+0.5 pP,50V,CERAMIC
| C145 5 pF,+0.25 pF,50V.CERAMIC C230 1000 pF, +20%,50V,CERAMIC
| C146 2 pF,+0.25 pF.50V.CERAMIC a 1000 pF, +20%,50V, CERAMIC
| C147 15 pF,+#5%,50V, CERAMIC C232 1000 pF,+#20%,50V ,CERAMIC
| C148 1 pF,40.25 pF|50V.CERAMIC C233 1000 pF ,+20%,50V ,CERAMIC
/ ; C234 1000 pF ,+20%,50V ,CERAMIC
NOTE: All resistors are 1/8W,+5%, carbon film unless otherwise C235 96 pF, 45%,50V,CERAMIC
noted.
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Tapie G-d APG Parts List (3 of 11) Tal
4c
|
e 6-1 AF6 Parts List (4 of 11)
we
Reference
a Reference
Symbol _ Description Part number Symbol _ Description Part Number
C236 150 pF ,+5%,50V, CERAMIC Ra. of HAC: SOW ee
C237 1000 pF ,+20%,50V, CERAMIC 1000 GP £20% oa ee
C238 22 pr,+5%,50V, CERAM! | See ee ae re
C239 1000 pF, +20%,50V, CERAMIC Fete co
C220 cn T USED). ' L000 pF ,+20%,50V,CERAMIC
= A ee gre i U2Z0U Oe Dr loa COV EOL Mae
el a io ce Banc 1000 pF, +20%,50V,CERAMIC
eee DE =U .60 PE, OV, CLCRAMIC 1000: pF, 220%, 50V, CERAMIC
C243 7 ly ee TC a 1000 pF ,+20%,50V,CERAMIC
Wat vp ° Pea ee fe Fel A r iid ENON Cre be ae URE Adi ay ae ca Ben
C245 1 uF ,50V, ELECTROLYTIC 1000 pk’220%'50V CERAMIC
C24 1000 pF ,+20%,,50V, CERAMIC SPOT A orca rce sche
0247 10 uF,16V, ELECTROLYTIC aCe 93Ac
eee Moms ao scrte ara COIL,CHOKE (FA4U-1277) 983448-34
ts Eee ea COLLZCHOKE (PAdU-1977) 383448-34
eae, pte ee IC COIL,CHOKE (FA4U-1277) 983448-34
) a5; ; Bay, bea UIC COM, CHOKE (eadu-cocan 983448-35
| C251 pF, 20.25 pF, SOV,CERAMIC COIL,CHOKE (FA4U-1936B) 983448-36
| ee 330 pF, #208, 50V, CERAMIC COIL,CHOKE (PA4U-2804B) 933443-35
) oo aie i Oe ae DIODE,SILICON (1S2689B) 983448-40
Goes = Coe EAR DIODE , SILICON (1S$2689B ) 983448-40
See Ese MIC DIODE, SILICON (MA150) 983448-41
a pie 220%, 50V, CERAMIC DIODE, SILICGN (MA1505 983448-41
ae oe a i re DIODE, SILICON (MA150) 983448-41
2s 30 pF, +20%,50V, CERAM DIODE, SILICON (MA150) 983440-41
oe cS . DIODE SILICON (MA150) 983443-41
C26 3 UF ,25V,EL Y DICDE, ZENER (X2090) $83448-42
met en MEER |: DIODE,SILICON (MA150) 983448-41
oS oe ae so ee ee D207 DICDE, SILICON (MA150) 983440-41
a Lo D208 DIODE, SILICON (MA150) 983448-41
C265 Dime ree %,50V ,MYLAR D209 DIODE, SILICGN (MA150) §$3446-41
ee, tae oe Coe eee ie D210 DIODE, SILICON (MA150) 983448-41
ee ee batt DIODE, ZENER (XZ090) ” 983440-42
ae ig Meee ce D212 DIODE, SILICON (MA150) 983448-41
ee 1000 pF..220%,50V MYLAR B216 DIODE, SILICON (MA150) $83448-41
oo ee pe ROLYTIC as D214 ~ DIODE,SILICON (MA150) 983448-41
on ieee AR Devon CERAMIC DISC (455D) 903446-5
cee 1 BF. 50V ELECTROLYTIC FET201 FIELD EFFECT TRANS. (2SK83) 983448-43
oe 33 UE 28V, ELECTROLYTIC PET202 FIELD LFFECT TRANS. (2SK83) 983448-4
2 -3 uF ,25V, ELECTROLYTIC FET203 FIELD EFFECT TRANS. (2SK83) 983448-43
| C275 1 uF ,50V,ELECTROLY 1 : ane ee
| Cor ihe ee TIC 1C201 ANALOG IC (AN274) 983448-53
| oes ae V ELECTROLYTIC L101 RF COIL (FA4U-3179 983448-24
| eon eee ULAR L102 RF COIL (FA4U-3179) 983448-24
Be a ue /gou ELECTROLY re L103 RF COIL (FA4U-3180) 983449-25
| C530 Bi ec aoee oe -TROLYTIC L104 RF COIL (FA4U-3180) 983448-25
| 658) eee aie V,MYLAR 05 RF COIL (FA4U-3181) 983448-26
URSIN ELECTROLYTIC L106 RF COIL (FA4U-3181) 983448-26
6-5
Reference
Symbol
L107
L108
L109
L110
Laat
Lil2
L113
L114
LATS
L201
£202
L203
L204
L205
LCG
L207
L208
L209
L210
Lok t
L212
R107
R108
R109
R110
R111
Ratz
R113
R114
RES
R116
R117
R118
R119
R120
R121
R122
R123
R124
R125
R126
RI27
R128
R129
R130
R131
Table 6-1 AFG Parts List (5 of Th)
Description
RF COIL (FA4U-3182)
RF COIL (FA4U-3182)
RF COIL (FA4U-3182)
RF COIL (FA4U-3183)
RF COIL (FA4U-3183)
RF COIL (FA4U-3183)
RF COIL (FA4U-3184)
RF COIL (FA4U-3184)
RF COIL (FA4U-3184)
RF COIL (FA4U-2190)
RF COIL (FA4U-2190)
RF COIL (FA4U-2190)
RF COIL (FA4U-2190)
RF COIL (FA4U-2190)
RF COIL (FA4U-2190)
RF COIL (FA4U-2265B)
RF COIL (FA4U-2190)
TY COU. CEIBa7S752C )
IF COIL (EIF-7S752C)
IF, COTE “CEP 75 752C)
IP COIL (FA4U-2643C)
La AG
10k
100
(NOT USED)
47k
470
ak
4.7k
47k
470
100
°.6k
33k
29ON
one
(NOT USED)
47k
47k
AT
Seok
Part Number
983448 -27
983448-27
983448-27
983448-28
9€3448-28
983448-28
983448-29
983448-29
983448-2
983448-30
383448-30
983448-30
983448-30
983448-30
©3448 -30
983448-31
QIAAO_?
UO
SS ee? “oes 4 1 Feel,
983448-32
AQAAN_29
983448-32
983448-32
983448-33
Reference
Symbol
Rise
R133
R134
R135
R136
R137
R138
R139
149
R141
4An
R142
R143
R144
R145
R146
R147
1AQ
CON ihe 1S}
R149
R1SC
R151
RIS2
R153
R154
RISS
R155
R157
R158
R159
R160
R161
Riec
R163
R1¢4
R213
R214
R215
R21 Gq
R217
R212
R219
RING)
Atecs
R221
VXD
\ace
R223
R224
R225
Tabie-6=1° Ar6 Parts List (6 ori)
Description
1k
47
1k
15
47,SOLID
10
ie
OE SOLES SL EN ENE ES
Part Number
Pee eon, ae ee Ae ee
ts f 4 i. be i
Hae Co). La fia Pn rite Se
1, yng ;
Reference
Table 6-1 AF6 Parts List (8 of 22)
Symbo Description art | Reference
at eens zart Number Symbol Description Part Number
R226 lk
ee a UREA R272 680
R226 10k R273 15k
R229 10k R274 1k
R230 560 TR101 TRANSISTOR (25C829) 983448-44
R231 10k TR102 TRANSISTOR (2S8C829) 983448-44
aoe 10k TR103 TRANSISTOR (2SC1047) 983448-45
R233 470 TR104 TRANSISTOR (28C1047) 983448-45
R234 CR < TR105 TRANSISTOR (2SC1047) 983448-45
R235 AT TR106 TRANSISTOR (2SC2053) 983448-46
Regs Se TR107 TRANSISTOR (2SC1970) 983448-47
R237 10k TR108 TRANSISTOR (2SA719) 983448-48
R238 te TR109 TRANSISTOR (2SC828) 983448-49
R239 150k TR110 TRANSISTOR (25C828) 983448-49
R24 4.7k TR111 TRANSISTOR (2SC828) 983448-49
R241 220 ge 2 TRANSISTOR (2SC828) 983448-49
R242 ATk TR113 TRANSISTOR (2SC828) 983448-49
R243 Seek TR201 TRANSISTOR (2SC1047) 983448-45
R24 AO TR202 TRANSISTOR (2SC1047) 983448-45
R245 32ak TR203 TRANSISTOR (2SC829) 983448-44
R246 47k TR204 TRANSISTOR (2SC829) 983448-44
R247 3:.8k TR205 TRANSISTOR (2SC829) 983448-44
R248 47k TR206 TRANSISTOR (2S8C829) 983448-44
R249 1k dO 7 TRANSISTOR (2SC829) 983448-44
R200) 68k TR208 TRANSISTOR (2S8C829) 983448-44
R251 1.5k TR209 TRANSISTOR (2SC828) 983448-49
Rese 5. 6k TR210 TRANSISTOR (2SC828) 983448-49
R253 15k TR211 TRANSISTOR (2SC828) 983448-49
R254 ers TR212 TRANSISTOR (2SC828) 983448-49
R255 4.7k TR213 TRANSISTOR (2SC828) 983448-49
R25 568 VR101 900, POTENTIOMETER 983448-22
R257 (NOT USED) VR102 5k, POTENTIOMETER 983448-23
Rese BEN ¥C107 20 pF,50V,VARIABLE CAP 983448-17
R259 Aa VC108 20 pF,50V,VARIABLE CAP 983448-17
R260 eee VC109 20 pF,50V,VARIABLE CAP 983448-17
R26] 4.7k X207 CRYSTAL RESONATOR 983448-21
Race Ae (FA4D10291C)
R263 15k
Ries AT Crystal Oscillator P.C. Board
R265 220 ;
BIE 33k C101 33 pF,+0.5 pF,50V,CERAMIC
R267 10k C102 33 pF,+0.5 pF,50V,CERAMIC
R266 1.ON C103 a3-pF 40-5 pF ,50V,CERAMIC
R269 ie C104 33 pF,+0.5 pF,50V,CERAMIC
Ram) 22Y C105 3c) DE weOes pF ,50V,CERAMIC
R271 33 C106 33 pF 40.5 pF,50V,CERAMIC |
C107 100 pF ,+20%,50V,CERAMIC
6-
: 6-9
hr Se
tm
Reference
Symbol
C108
C201
C202
C203
C204
C205
C206
C207
C208
C209
C210
C211
C212
D101
D102
D103
D104
D105
D106
D201
D202
D203
D204
D205
D206
R101
R102
R103
R104
R105
R106
R201
R202
R203
R204
R205
R206
R207
R208
R209
R210
R211
RiZi2
VC101
VC102
VC103
Description
1000 pF ,+20%,50V, CERAMIC
10 pF,+0.5 pF,50V,CERAMIC
10 pF,+0.5 pF,50V,CERAMIC
10 pF,+0.5 pF,50V,CERAMIC
10 pF,40.5 pF,50V,CERAMIC
10 pF,+0.5 pF,50V,CERAMIC
10 pF, 40.5 pF,50V,CERAMIC
1000 pF, +20%,50V, CERAMIC
1000 pF,+20%,50V, CERAMIC
1000 pF,+20%,50V, CERAMIC
1000 pF ,+20%,50V,CERAMIC
1000 pF ,+20%,50V, CERAMIC
SDE sissy cea
C301
DIODE, SILICON (MCA01)
E, SILICON (MC301
DIODE, SILICON oo
DIODE, SILICON (MC301)
DIODE ,SILICON (MC301)
DIODE, SILICON (MC301)
DIODE, SILICON (MC301)
DIODE, SILICON (MC301)
DIODE, SILICON (MC301)
DIODE, SILICON (MC301)
DIODE, SILICON (MC301)
NNN NNNNNWNH DY
us Bats
wa
22k
20 pF,50V,VARIABLE CAP
20 pF,50V,VARIABLE CAP
20 pF,50V,VARIABLE CAP
6-10
‘Table 6-1 AF6 Parts List CorOr 41)
Part Number
983448-50
983448-50
983448-50
983448-50
983448-50
983448-50
983448-50
983448-50
983448-50
983448-50
983449-50
983449-50
983448-17
983448-17
983448-17
Reference
Symbol
VC104
VC105
VC106
VC201
VC202
VCz203
VC204
VC205
VC206
X101
X102
X103
X104
*X105
X106
X201
X202
X203
X204
X205
X206
XS101
XS201
Description
VARIABLE CAP
VARIABLE CAP
VARIABLE CAP
VARIABLE CAP
VARIABLE CAP
VARIABLE CAP
VARIABLE CAP
Ape, DU;
ZOE, OOM,
20 2p E oO,
20:pF. oOV.,
Z0=DE SOV;
20> pF 50V,
20 DF oOV
,VARIABLE
,VARIABLE
20 pF,50V
20 pF,50V
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
CRYSTAL
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
RESONATOR
SOCKET (S-20-6P)
SOCKET (S-2Z0-6P)
NOTE
Chassis Mounted Components
C001
C002
C003
DO01
D002
FOO1
J001
J002
J003
MO01
MIC
ROOL
ROO2
5001
S002
S003
SP001
CAP
CAP
(TX)
(TX)
(TX)
(TX)
(TX)
(TX)
(RX)
(RX)
(RX)
(RX)
(RX)
(RX)
3380 WE, 16V ELECTROLYTIC
1000 pF ,+10%,50V,MYLAR
1000 pF ,+20%,50V ,CERAMIC
DIODE,SILICON (RA-1Z)
LED RED
(SR-103D)
3 AMP FUSE (F7142-3A)
RF JACK
AF JACK
(HMB-R-3)
(EJU=3E)
DC JACK (EC342-1-1)
METER (MC-12M)
MICROPHONE (WM-034X)
560 ,4+10%,1/2W, CARBON FILM
3.3,t10%,1/2W, SOLID
TOGGLE, SWITCH (MTE-106D-1
PTT SWITCH (AM6220)
ROTARY SWITCH (AM6220)
SPEAKER (EAS6P75CM)
6-11
Table 6-1 AF6 Parts List (10 of 11)
Part Number
983448-17
983448-17
983448-17
983448-17
983448-17
983448-17
983448-17
983448-17
983448-17
983533-xxXx
983533-xXxXxX
983533-xxx
983533-xXxXx
983533-xXxXx
983533-xxXxX
983534-xxx
983534-xxx
983534-xxx
983534-xxx
983534-xxx
983534-xxx
983448-20
983448-20
When ordering crystals the desired channel
number must be specified.
983448-6
983448-7
983448-8
983448-9
983448-10
983448-11
983448-12
983448-13
983448-14
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PURPOSE
THIS MANUAL CONTAINS IMPORTANT INFORMATION ON THE INSTALLATION,
OPERATION AND MAINTENANCE OF YOUR EQUIPMENT.
RAYTHEON MARINE COMPANY products are supported by a worldwide network
of Authorized Service Representatives.
The below-listed Raytheon Marine Company Factory Service Centers will either
assist you directly,
or refer you to an Authorized Service Representative.
FACTORY SERVICE CENTERS
CALIFORNIA:
633 N. Marine Avenue
Wilmington, Ca. 90744
(Los Angeles)
Phone: (213) 835-0147
FLORIDA:
1107 N. Ward Street
Tampa, FI. 33607
Phone: (813)877-9418
LOUISIANA:
525 Jefferson Street
New Orleans, La. 70121
Phone: (504) 835-6491
MASSACHUSETTS:
Phone: (617) 935-6710
NEW HAMPSHIRE:
25 Industrial Village
Londonderry, N.H. 03053
(Manchester)
Phone: (603) 668-1600
NEW YORK:
756 5th Avenue
Brooklyn, N.Y 11232
Phone: (212)768-2511
Rayscan-Copenhagen
Siljangade 6-8
DK-2300 Copenhagen S
Denmark
Phone: 451-550702
TEXAS:
1203 Galveston Street
South Houston, Tx. 77587
Phone: (713) 941-2700
VIRGINIA:
6529 Tidewater Drive
Norfolk, Va. 23509
Phone: (804) 857-0178
WASHINGTON:
4800 20th Ave. NW
Seattle, Wa. 98107
Phone: (206) 782-0242
im
®
Marine Products
Raytheon Marine Company warrants all parts of each new product against defects in material and workmanship
under normal use, and will repair or exchange any parts proven to be defective at no change for a period of TWO
YEARS from the date of original installation, EXCEPT AS PROVIDED BELOW.
Defects will be corrected by an authorized Raytheon Marine Company Service Station. There will be no charge
for labor for a period of ONE YEAR from date of original installation, EXCEPT AS PROVIDED BELOW, and during
this time Raytheon Marine Company will assume travel costs of its Authorized Service Station Representative up to a
total of 100 highway miles.
WARRANTY LIMITATIONS
Raytheon Marine Company will not be responsible for equipment which has been subjected to accident, abuse, or
misuse, nor any equipment on which the serial plate hes been removed, altered, or mutilated.
Except where Raytheon Marine Company has performed the installation, it assumes no responsibility for damage
Incurred during installation.
This warranty is effective only with respect to the original purchaser from Raytheon Marine Company or an
authorized Raytheon Marine Company Representative.
A validated warranty certificate and station logbook (if applicable) must be made available to the authorized
Raytheon Marine Service Station Representative at the time of tervice,
On radar installations, the magnetron, T/R cell, klystron, and modulator tube (if applicable), and cathode ray
tube are warranted for SIX MONTHS from date of original installation.
Chart paper, stylii, stylus belts, lamps, and fuses are consumable items, and are not covered by this warranty.
An, cost associated with transducer replacement, other than the cost of the transducer itself, is specifically
excluded from this warranty.
Travel costs will not be accepted for products that do not require installation by an Authorized Service Station.
Raytheon Marine Company equipment or parts thereof which have been repaired or altered outside of its plant
except by Authorized Raytheon Marine Company Service Stations are not warranted in any respect.
This warranty is STRICTLY LIMITED to the terms indicated herein, and no other expresa warranties or remedies
thereunder shall be binding on Raytheon Marine Company. TO THE EXTENT CONSISTENT WITH STATE AND
FEDERAL LAW: (1) ANY IMPLIED WARRANTIES SHALL BE LIMITED TO THE SAME TIME PERIODS STATED
HEREIN FOR EXPRESS WARRANTIES, AND (2) RAYTHEON MARINE COMPANY SHALL NOT BE LIABLE FOR
oo DAMAGES UNDER ANY EXPRESS OR IMPLIED WARRANTIES RELATING TO THIS
UIPMENT.
RAYTHEON MARINE COMPANY
676 Island Pond Rosd, Manchester, New Hampahire 03103
66-S2 (4/77)
NOTE: THE SAMPLE WARRANTY STATEMENT IS
FURNISHED FOR REFERENCE ONLY,
PLEASE REFER TO THE WARRANTY CER-
TIFICATE ISSUED WITH YOUR EQUIPMENT
FOR SPECIFIC TERMS AND CONDITIONS.
TABLE OF CONTENTS
SECTION 1 INTRODUCTION
ihe
ale 7
GENERAL
SPECIFICATIONS
Transmitter
Receiver
Operating Voltage Requirement
Input Current
Dimensions
SECTION 2. OPERATION
2.2
CONTROLS, INDICATORS, AND CONNECTORS
OPERATING PROCEDURE
2.2.1 To Receive
SECTION 3 RADIOTELEPHONE SERVICES
3.4
BASIC RADIOTELEPHONE SERVICE
GETTING ON THE AIR
TECHNICAL REQUIREMENTS ©
REGISTER WITH THE COAST STATION
MARINE RADIOTELEPHONE
3.5.1 WHF Service
DISTRESS, URGENCY AND SAFETY MESSAGES
3.6.1 Distress Signal: MAYDAY
3.6.2 Urgency Signal: PAN
3.6.3 Safety Signal: SECURITY
WEATHER BROADCASTS
KEEPING THE LOG
amt A gg See
Sorin
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away oe vi ty
nae sy
) tw ©
cis Weeewera
ee = ee NAAR CCN REE en ee ene
3.9 PHONETIC ALPHABET 3-9 7.3. INSTALLING ADDITIONAL OR NEW CHANNELS
RULES TO REMEMBER 3-10 7.4 FREQUENCY ADJUSTMENT
SECTION 4 LICENSING 7.5 PRELIMINARY ALIGNMENT AND CHECKOUT
jo) GENERAL al 7.5.1 Receiver
7.5.2 Transmitter
4.2 SHIP STATION LICENSE 4-1
7.6 TRANSMITTER ALIGNMENT
4.3. RENEWAL OF SHIP STATION LICENSE u-1
7.6.1 Oscillator and Buffer
4.4 INTERIM SHIP STATION LICENSE FOR RADIOTELEPHONE 4-1 76.2. Uranemitter Maltipiter
nea 7.6.3 RF Power Amplifier
4.5 OPERATOR LICENSE i : 7.6.4 Low Power Output Adjustment
+e 7.6.5 Modulator Deviation
4.6 APPLICATION FOR OPERATOR PERMIT 7.6.6 18.5 kHz Filter (L621)
4.7. FEES oe 7.7. RECEIVER ALIGNMENT
Woden:
7.7.2 RF Amplifier
Wo thn es:
5.1 GENERAL CONSIDERATIONS = (PAW lifier
5.2 CONNECTING 12V POWER SOURCE Sj] 7.8 TROUBLESHOOTING
S28. CROON ES sol 7.8.1 Receiver Operational Checks
TENNA 5-3 7.8.2 Transmitter Operational Checks
5.4 SELECTING AND INSTALLING THE AN 7.3 3 cReceiver DC Woitece:
7.8.4 Transmitter DC Voltages
5.5 INSTALLING ADDITIONAL CHANNELS 55)
SECTION 8 SCHEMATIC DIAGRAM AND PARTS LIST
5.6 MOUNTING MICROPHONE AND EXTERNAL SPEAKER 5=5
SECTION 9 MARINE MOBILE ANTENNAS
SECTION 6 THEORY OF OPERATION
9.1 GENERAL
6.1 RECEIVER 6-1
"9.2. ANTENNA MOUNT MODEL AM18
6.2 TRANSMITTER 6-2
9.3 ANTENNA MOUNT MODEL AM-1W
SECTION 7 MAINTENANCE
9.4 ANTENNA MOUNTING/INSTALLATION
7.1 GENERAL US)
7.2. BASIC MAINTENANCE PROGRAM TN
Ya Cehewer
PECLIONS HWWIHEtvyace
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er HECTIAEK
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es,
LIST OF ILLUSTRATIONS
Title
Controls, Indicators and Connectors
RAY-48A Outline and Mounting Dimension
Installation of the RAY -48A
Typical Antenna Locations on Various
Types of Craft
RAY-48A System Block Diagram
Output Power Vs Supply Voltage
RAY-48A VHF FM Marine Radiotelephone
Schematic Diagram
Antennas and Mount Illustration
LIST OF TABLES
Title
Controls, Indicators and Connectors
VHF FM Marine Radiotelephone Channels
and Functions
Recommended Commercial and Non-
commercial Channels for the RAY-48A
Crystal Frequencies Required for Essen-
tial Channels
Crystal Trimmer Capacitors for Each
Position of Channel Selector Switch
Receiver DC Voltage Chart
Transmitter DC Voltage Chart
D=3
5-4
Tag
8-2
9=3
HAS
f=]
SELIIUN 1
INTRODUCTION
iicet GENERAL
Your RAY-48A VHF-FM radiotelephone has been designed for years of
reliable, attention-free Operation whether put to use under a recre-
ational or commercial environment. Among the outstanding features
contributing to its reliability and high performance are:
- All solid state Circuitry, ensuring low power
drain, minimal heat from unit, and maximum
reliability
= High selectivity designed into receiver guar-
antees optimum performance under congested
harbor conditions
= Twelve transmit/receive channels available -
six set up for use in unit as delivered
= Two weather channels provided for the En-
vironmental Science Services Administration
(ESSA) continuous area forecasts and local
reports. One channel is installed in unit
delivered
= 3 watts audio power ensures ample volume
to override wheelhouse noises
= Channels 6, 16, 22A, 28 and 68 provided in
all units
= Mounting bracket supplied allows RAY-4sA
to be installed in any convenient location
le SPECIFICATIONS
Transmitter
Channels Twelve
Frequency range 156.275 to 157.425 MHz
UE
mh
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Pe tnd
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UWE She Fite
fae bas 5s
es
a
Frequency stability
Crystal type
Power output
Modulation
Modulation limiting
Audio response
Audio roll-off filter
Spurious outputs
Hum and noise level
Receiver
Channels
Frequency range
Frequency stability
IF frequency
Sensitivity
20 dB quieting
12 dB Sinad
Modulation acceptance
Squelch sensitivity
0.001% (-20°C to +50°C) (ship station)
HC 25/U (fundamental mode), in oven
25 watts into 50 ohm load, reducible
to 1 watt
Frequency-modulated (16F3) through
modified phase modulator (+5 kHz
deviation for 100% modulation)
Instantaneous, automatic at 100%
modulation
6 dB (+1 dB, -3dB) pre-emphasis
300 to 3000 Hz
Exceeds FCC requirements of 18 dB
per octave beyond 3000 Hz
At least 60 dB below rated carrier
output
At least 40 dB below two-thirds of
full modulation
Fourteen
156.275 to 162.55 MHz
0.001% (-20°C to +50°C)
16.9 Aiiz Ist IF and 455 kHz 2nd IF
O53) URY
ORS 5 su
6.5 KHZ
Not more than 0.5 uV
J=2
Audio output
Adjacent channel
selectivity and
desensitization
Spurious response
Operatin
Voltage Requirement
Input voltage
Operating range
Input Current
Receive mode (no
signal)
Transmit
Crystal oven
Dimensions
Height
Width
Depth
Weight
ee) ani
8.0 in.
dale tine
Gaol:
3 watts or more at 10% or less distor-
tion into an external 4 ohm load, or 1.5
watts into an internal speaker
At least 60 dB
Greater than 70 dB
13.6 volts DC (nominal)
eG ROMS s6avalts DG
Less than 400 mA
RYO) YN
250 mA average at 25°C
68 mm
202 mm
283 mm
3.0kg
1-3
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SECTION 22
OPERATION
251 CONTROLS, INDICATORS, AND CONNECTORS
3 Figure 2-1 and Table 2-1 illustrate and describe the functions of
each control, indicator or connector essential to the operation of
the RAY-48A.
Table 2-1 Controls, Indicators and Connectors (see Figure 2-1)
2-4
Location Control Function
1 SQUELCH Adjusts threshold at which
squelch becomes operative.
2 Pilot Indicates power is on. Illum-
(indicator) inates the channel selector.
3 WX Selects weather channel (re-
WI/OFF/W2 ceive only). In OFF position
operation is restored to normal
channels for two-way commun-
ication.
4 RF PWR Selects transmit power level.
25W - 1W High power 25 watts; low power
1 watt.
5 MIC Accepts connector supplied with
(connector) RAY-48A microphone.
6 BOX IIluminates to indicate when unit
(indicator) is transmitting.
7 Channel Permits two-way communication
selector on selected channel whenever
WX switch is set to OFF.
8 VOLUME Turns power on and off. Ad-
OFF justs speaker volume whenever
SQUELCH threshold is set below
noise or signal level.
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4, Weather reports are continuously available on either W1
or W2 position of the Wx control. Either position over-
rides all other receive channels, so it is necessary to
Table 2-1 Controls, Indicator and Connectors (Conit)
i Conirol Function
PeestioD ase return the WX selector to the OFF position to again
5 Aree Female coaxial connector Type $0-239 receive or transmit normal communications.
cable (mates with a PIES 9) ,
las des To Transmit:
10 Power A male plug that accepts con- 1 A
pabnecion RactiE ae ne cable furnished hs Select desired channel and listen carefully to assure
(unmarked) with the RAY-4gA. that it is not busy... If it is busy you will hear voices
a Or an intermittent busy tone. Do not interrupt unless
1 seek Accepts a plug for connection an emergency situation exists.
(unmarked) of an external 4 ohm to 8 ohm :
2 If the channel is clear, press the PUSH-TO-TALK but-
speaker. p
ton on the microphone to activate the transmitter.
Announce the name of the boat you are calling and its
call letters (if available), followed by the name of your
boat and your. caij tetters. Repeat if necessary. Re-
lease the microphone button to receive a reply. At the
end of the conversation announce that you are signing
off and again give the name and call sign of your boat.
FRONT Your transmitter is in Operation only when the micro-
phone button is depressed, and only then can others
hear you. The receiver functions only when the button
is released, and only then can you hear others.
Figure 1-1 Controls, Indicators and Connectors
Dee OPERATING PROCEDURE
Phe F264 To Receive:
il Rotate VOLUME control clockwise and adjust for a com-
fortable listening level,
a Set channel selector to desired operating channel and :
readjust the VOLUME control as necessary.
She Adjust SQUELCH control clockwise slowly until back-
ground noise is just muted. This should be done when
there are no signals being received, It is important
that this control be adjusted just to the threshold point,
so that a weak signal will still be audible. When a
transmission is made, it will trip the squelch circuit,
allowing signal to be heard.
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— = — ———————————
SECTION 3
RADIOTELEPHONE SERVICES
Sra BASIC RADIOTELEPHONE SERVICE
Radiotelephone communication capability provides important bene-
fits of safety and convenience. It is possible to call, or be called
by, the Coast Guard or other vessels within range.
Siz GETTING ON THE AIR
Before a vessel can lawfully transmit any message, with or without
_ the assistance of a Marine Telephone Operator, the FCC requires
that the following be on board:
ile A valid ship's radiotelephone station license
he A licensed radiotelephone operator
35 A radiotelephone station log book
Federal Communications Commission regulations prohibit the use of
profane language, and establish other reasonable controls. All
persons aboard a vessel who will be using its communications
equipment should be familiar with these and with approved opera-
ting procedures. Frequencies are shared with other boatmen.
Contact should be kept brief so that all may have an equal oppor-
tunity to transmit and receive messages.
BS TECHNICAL REQUIREMENTS
The Telephone Company (or independent common carrier) operates
the shore-base radio stations. It does not rent, lease or sell radio-
telephone equipment for use aboard ship. Such equipment is
owned and maintained by the boat owner or, in some cases, by a
maritime radio operating company. The selection, installation, and
maintenance of a shipboard radio station is highly technical and should
be entrusted only to a licensed, reliable marine radio service concern.
The owner's service requirements and the operating area will deter-
mine the type of marine telephone service and the specific installa-
tion needed. Transmitters must meet the requirements set forth
in the International Regulations applicable in the country in which
the ship is registered. Vessels of United States registry must
conform to the regulations of the FCC.
Se
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3.4 REGISTER WITH THE COAST STATION
: : p : * il Public Class II|-B Coast Stations
If regular use of Public Marine Radiotelephone Service is planned,
it is important to register with the owner of the coast station serv- This service offers reliable operation with good trans-
ing the primary area of operation. Registration with Bell System mission quality over distances of 20 to 50 miles, using
stations is free. It provides the coast station with billing infor- EM with chanmnels-in.the 156 MHz. ta-162.MHz cade
mation for calls, and saves the air time necessary to transmit this Antenna height and equipment quality are the Oe
information on each: call, factors that determine communication range.
For information on Bell System Marine services, or to register a 2 VUE-_Channels
vessel, call the Telephone Company representative in your area. <
Pe CA fee ea Mil k There are 29 noncommercial VHF channels available in
eo ve Bide ees ti WaUkes aes! wee ee the United States. They are grouped into categories
Baltimore, MD
Birmingham, AL
Boston, MA
Charleston, SC
Charlotte, NC
Chicago, IL
Cincinnati, OH
Cleveland, OH
Detroit, Ml
Houston, TX
301-393-1036
205-321=8509
617-743-4035
803-722-9011
704-372-9456
312-727-1574
513-397-3430
216-822-4840
313-354-9550
713-521-6355
Montreal, Canada
Newark, NJ
New Orleans,
New York, NY
Norfolk, VA
Omaha, NB
LA
Philadelphia, PA
Portland, OR
San Francisco,CA
514-870-7189
201-649-2014
504-581-7337
212-564-0410
ZZ 39357394
804-424-9911
402-422-8656
215-466-4648
503-224-6261
415-986-5216
for specific uses so that maximum utilization with mini-
mum interference can be attained. A listing by category
may be found in Table 3-1.
Channels for use only by commercial vessels are: 7, 8,
10; sl 18, 19 Owe eh 197 80) andas sags Ghanmel smog
International use only BRC Tis lite eS eet ee GIRLS:
Table 3-1 VHF FM Marine Radiotelephone Channels and Functlons (1 of 2)
J19=524-—71108 415-442-2262
Indianapolis, IN 317-630-1697 Seattle, WA 206-345-2341 CHANNEL FREQUENCY (MHz) TYPE OF FUNCTION
Jacksonville, FL 904-353-2315 Washington, DC 202-392-3682 DESIG SHIP SHORE TRAFEIG SHIP TO) SHIPS SRIF TO) SHORE
Los Angeles, CA 213-744-1616 202-637-9900 ; Safety Yes No
Commercial No Yes
Commercial Yes Yes
Commercial Yes No
Port Operation Yes Yes
Miami, FL 305-379-0745
305-350-8026
Wilmington, NC 919-763-4675
Commercial Yes Yes
Commercial Yes Yes
Port Operation Yes Yes
Navigational Yes Yes
Port Operation Yes Yes
Weather Pending
NOTE
Keep the Telephone Company informed of
any changes that affect your registration.
Receive Only Receive Only
Safety and Calling Yes Yes
State Control No Yes
Int'l Only No Yes
Commercial Yes Yes
35 MARINE RADIOTELEPHONE
Int'l Only No Yes
Commercial Yes Yes
Port Operation No Yes
Port Operation No Yes
Special No Yes
Public Correspondence
Coast Guard Yes Yes
Port Operation No Yes
Port Operation Yes Yes
Coast Guard Yes Yes
Public Correspondence No Yes
The Bell System and numerous independent commom carriers main-
tain a network of marine radio stations strategically located along
the coastal waters and major inland waterways of the 48 contiguous
states of the U.S. Stations are generally operated around the clock. =
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Table 3-1 VHF FM Marine Radiotelephone Channels and Functions (2 of 2)
FREQUENCY (MHz)
SHIP
SHORE
156
aS 3
- 800
161.
161.
161
161
156
156.
156.
150
150
850
900
-950
162,
160.
156.
160.
000
875
275
925
no2o
425
475
TYPE OF
TRAFFIC
Special
Public Correspondence
Coast Guard
Public Correspondence
Public Correspondence
Publlc Correspondence
Public Correspondence
Public Correspondence
Int'l Only
Port Operation
Int'l Only
Port Operation
Commercial
Non Commercial
Non Commercial
Non Commercial
Non Commercial (Marinas)
Non Commercial!
Port Operation
Port Operation
Commercial’
Int'l Only
Non Commercial
Int'l Only
Commercial!
Int'l Only
Commercial
Port Operation
Port Operation
Port Operation
Public Correspondence
Port Operation
Public Correspondence
Special
Public Correspondence
Coast Guard Aux
Public Correspondence
Public Cerrespondence
Public Correspondence
Public Correspondence
Int'l Only
Commercial
ESSA Weather
ESSA Weather
ESSA Weather
3-4
FUNCTION
SHIP TO SHIP SHIP TO SHORE
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No Yes
No Yes
Yes
No Yes
No Yes
No Yes
No Yes
No Yes
Yes No
Receive Only Receive Only
Receive Only — Receive Only
Receive Only —_ Receive Only
Placing Calls on VHF/Ship-to-Shore
a. Listen to verify channel to desired stations is
not busy.
be When channel is clear, put transmitter on air
for 15 to 20 seconds - repeat until channel is
clear or Operator answers.
Cr When the Marine Operator answers, say: "This
is (Ship Call Signal) the telephone billing num-
ber is. . .". If there is no telephone billing
number, state caller's name, ship's name and
address in city of registry.
d. Finish up with the city and telephone number
being called. Proceed thereafter as directed.
e. At the end of the conversation, repeat ship's
name and call sign and sign off with "clear"
Ore Joutle
Placing Shore-to-Ship Calls
a. Call the local telephone operator and ask for the
Marine Operator.
b. Give the Marine Operator the name of the ship
being called, its call sign, location, and selective
signaling code number (if applicable). Proceed
thereafter as directed.
Receiving Shore-to-Ship Calls
To receive public coast station calls, a receiver must be
in operation on the proper channel.
When calling on VHF, Bell System coast stations will
generally call on their assigned channel frequency.
On Coastal Harbor frequencies, Bell System coast stations
normally call on a working channel of the coast station,
but will call on the distress frequency (156.8 MHz) when
requested to do so by the calling party.
355
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= OS Sets
Since it is mandatory for commercial operators to main-
tain a watch on Channel 16 (156.8 MHz), many commer-
cial operators carry an additional receiver tuned to a
working frequency of their area coast station. This
enables them to receive a high percentage of calls on
the first attempt.
When you hear your boat called, answer as follows:
(Name of coast station that called) "This is (Name
of your vessel and call sign), Over". Proceed there-
after as directed.
6. Ship-to-Ship Direct
To directly contact another vessel, compatible equip-
ment must be available. If the other vessel is out
of range, make contact through the Marine Operator.
Most direct ship-to-ship contacts are originated on the
distress calling and safety frequency - Channel 16
(156.8 MHz).
a. On Channel 16, give the name of the vessel be-
ing called, and the name and call sign of the
calling vessel.
b. When the called vessel answers, it should sug-
gest an intership frequency on which to complete
the conversation. ° Calls must be limited to 3 min-
utes except in emergencies.
Ge When the call is complete, sign off with vessel
name and call sign. You may not call the same
boat again for at least 10 minutes.
d. Return your receiver to distress safety and calling,
Channel 16.
3.6 DISTRESS, URGENCY AND SAFETY MESSAGES
If the radiotelephone is turned on, and not in use, it should be mon-
itoring the calling and safety frequency (Channel 16). This chan-
nel is monitored 24 hours a day by the Coast Guard and most
commercial shore stations. If help is needed, it can be on its way
in moments from the Coast Guard and other vessels in the area.
3-6
Distress, urgency and safety messages are identifiable by a code
word at the beginning of each message. This word indicates the
priority of the message.
MAYDAY
Smo Distress Signal:
Used if there is an immediate danger of loss of life or property.
MAYDAY has priority over all other communications.
ike If a MAYDAY is Heard
Immediately discontinue any transmission. Note the de-
tails of the message in the radio log immediately. A
call to relay information or render assistance may be
received. Having the facts may make it possible to help
save a vessel or a life.
Unless you are in a position to render assistance, do
not make any transmissions on this channel until the
MAYDAY condition is lifted by the Coast Guard.
Ih To Make a MAYDAY Call
ar Switch to Channel 16 (156.8 MHz)
NOTE
Because the primary purpose of the channel is to sum-
mon help, it is likely that an immediate response will
be received. If not, repeat the message. If still no
reply, transmit on any other available frequency until
contact is made.
Joye Speaking slowly and distinctly, say "MAYDAY, MAYDAY,
MAYDAY. This is . . ." giving the name of your vessel
and call sign three times. Then continue with the dis-
tress message, as follows, still speaking slowly and
distinctly.
c Name of the calling vessel.
d. Position (or best estimate) .
e. Assistance needed.
ifs Description of vessel (type, color, length, number of
persons aboard, etc.).
Gr Indicate end of message by saying, "Over".
37
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3.6.2
Used when the safety of a vessel or person is in jeopardy. "Man
overboard" messages are sent with this urgency signal. PAN has
priority over all other communications with the exception of dis-
tress traffic.
Se6ia5 Safety Signal: SECURITY
Used for messages concerning the safety of navigation and trans-
mission of important meteorological warnings.
Shad WEATHER BROADCASTS
Coast Guard stations transmit weather information in many areas.
Local frequencies and schedules may be obtained from the nearest
Environmental Science Services Administration (ESSA) office. The
U.S. Weather Bureau broadcasts current weather on channels W1
(162.55 MHz), W2 (162.400 MHz), and W3 (162.475 MHz). Channel
W4 (161.650) is the Canadian weather broadcast frequency.
At some shore stations, the Marine Operator broadcasts weather in-
formation. The Marine Operator may be consulted for channels used
and time schedule of broadcasts. Commercial broadcasting stations
generally broadcast weather reports and forecasts as part of their
news coverage.
NOTE
No prudent boatman ventures out of port without
the best available knowledge of weather conditions
and possible changes. Your radiotelephone can
help you obtain this important information.
38 KEEPING THE LOG
NOTE
Radiotelephone logs must be retained for at least
one year, and for three years if they contain
entries concerning marine disaster or distress.
This period may be longer if an investigation is
underway or pending.
The FCC requires the following entries in a radiotelephone log each
day underway:
13 Name of vessel.
28 Vessel's call sign.
3 Operator's signature.
te Date and listening time on Channel 16 (156.8 MHz)
using the 24 hour clock.
55 All distress (MAYDAY) messages heard or transmitted.
6. All urgency (PAN) and safety (SECURITY) messages
transmitted.
Ts Distress, urgency, and safety messages should be logged
in as much detail as possible, including date, time of
day, operating frequencies, vessel's name and position,
and nature of emergency.
8. All installation, service, and maintenance details that
affect the operation of the transmitter must be entered
by the licensed technician performing such work, includ-
ing his address and the class, serial number and expir-
ation date of his license.
sya 8) PHONETIC ALPHABET
To help make call letters more clearly understood, and to assist in
spelling out similar-sounding or unfamiliar words, radiotelephone
users usually employ the international phonetic alphabet, as shown
below.
PHONETIC ALPHABET
AS AEPHA eS WEE S - SIERRA
B - BRAVO Ke KIkOe Ti — TANGO
G GHAREIE L - LIMA U - UNIFORM
De DEETA M - MIKE Ve = VICTOR
iS = (Bene N - NOVEMBER W - WHISKEY
Fo = FOXTROT OF OSCAR eS SIRE
Ga GOEF Pe RAPA Y = YANKEE
Ieee Ones Q - QUEBEC LZ = ZUEU
1 - INDIA R - ROMEO
3-9
i ee eo ; ie
2Mr= Deeg wie pe alien
SUM? covohvnt whan -a
-S8e treo.2 ts
LOSE 6 tebe
smu}
AWAURSE
xe,
WAGKEA
AitsoeS-
£4 Ske
=yACGS..
eesy
Consisce-
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pes cat Sa “or
RULES TO REMEMBER
YOUR RADIO CAN MEAN YOUR SAFE ARRIVAL - USE IT WITH
RESPEGHE
The following are some important points of proper usage recommen-
ded by the Radio Technical Commission for Marine Services, Wash-
ington, D.C. Numbers in parentheses refer to paragraphs in FCC
Rules, Part 83.
BE SURE TO GIVE NAME AND POSITION OF VESSEL.
Emergency Situations
Distress MAY DAY -MAYDAY-MAYDAY
Urgency message concerning
safety of vessel or person(s) PAN-PAN-PAN
Safety of navigation or
important weather infor-
mation SEGURIIYeSECURITY- SECURITY:
1. Maintain Your Watch Listen to channel 16 when not in com-
munication with another vessel! (83.223)
2. Listen Before You Talk Avoid interference with calls in pro-
Gressma(SSa1(8ill)ie
3. Identify Your Vessel Give your call sign and vessel name
at beginning and end of each commun-
ication (83.364).
4. Make Calls Correctly Call other vessels on channel 16 then
switch to intership channel (83.366).
Call public shore stations, in general,
on an appropriate working channel
: (83.366).
5. Use Channels Properly Channel 16 for emergencies and brief
calls and replies (83.353). Intership
(channel 6) for safety, operational or
business communications (83.358) .
6. Watch Your Language Use of profane or obscene language is
a criminal offense.
RULES TO REMEMBER (Cont'd)
7. Be Brief At All Times Limit calls to 30 seconds; Conversa-
tions to 3 minutes (83.366).
8. Keep An Accurate Log Make entries as required by (83.366).
9. Have Documents Handy Ship Station License; Operator Lic-
ense or permit; Part 83 of FCC Rules;
Log Book (83.3670).
If both VHF and MF (single sideband) radiotelephones are installed, VHF
must be used whenever within VHF range. This is required by FCC reg-
ulations.
If you hear a MAYDAY call, respond only if in a position to render assis-
tance or relay the distress message.
False distress signals are prohifpited. Violation, under FCC regulations,
may result in a maximum fine of $10,000 and imprisonment up to two
years.
Keep your radiotelephone equipment in good working order. Have it
checked periodically by a qualified, licensed technician.
Radiotelephone messages, like telephone conversations, are private. It
is unlawful to make use of any information not intended for you.
wa? bSobeete
st
77
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Seg
SECTION 4
LICENSING
4.1 GENERAL
All radio stations aboard U.S. flag vessels must be licensed by the FCC
under Part 83 of the FCC regulations. The licensee is responsible at
all times for the lawful and proper operation of his station. Licenses
- are not granted to aliens except where the radio installation is required
by law or treaty. Ship stations are licensed primarily for safety of life
and property. Distress and safety communications must, therefore,
have absolute priority.
4.2 SHIP STATION LICENSE
Application for a ship radiotelejnone and/or radionavigation station
(radar) license is made on FCC Form 502, except that FCC Form 501
shall be used for radiotelephone stations required by Title If, Part II
of the Communications Act of 1934, as amended, or the Safety of Life
at Sea Convention, or where the applicant is also the licensee of radio-
telegraph equipment aboard the vessel. FCC Form 501 is used for char-
ter boats and commercial vessels which require a radiotelephone in-
stallation.
4.3 RENEWAL OF SHIP STATION LICENSE
An application for renewal of a ship radiotelephone and/or ship radio-
navigation (radar) station license shall be filed on FCC Form 405-B,
except that FCC Form 405-A shall be filed for renewal of a ship station
license which also authorizes radiotelegraph equipment. Insofar as pos-
sible, FCC Form 405-B is mailed to the station licensee 60 days prior to
expiration of his license. If it has not been received 30 days prior to
expiration, FCC Form 405-B may be obtained upon request from the near-
est FCC office. The application for renewal must be received by the FCC
prior to the expiration date.
4.4 INTERIM SHIP STATION LICENSE FOR RADIOTELEPHONE
~ An interim license authorizing the operation of a ship radio station for a
six-month period may be obtained at any Commission field engineering
office upon presentation (by the applicant or any person who informs the
office that he has been authorized to act in behalf of the applicant in sec-
uring an interim ship station license) of a properly completed application
and an informal request for an interim license.
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In Alaska only, an interim ship station license may be obtained by mail-
ing a properly completed application and a written request for an interim
ship station license to the Commission's field engineering office at
Anchorage.
The full-term license will be mailed to the licensee prior to the expira-
tion of the interim license.
The interim license procedure does not apply to renewal applications.
4.5 OPERATOR LICENSE
The radiotelephone transmitter in a ship station may be operated only by
a licensed radio operator. The licensed operator may permit others to
Operate the transmitter if he starts, supervises, and ends the operation,
makes the necessary log entries, and transmits the necessary identifica-
tion. The license usually held by the radio operators aboard small
vessels not required to carry a radio installation for safety purposes is
the Restricted Radiotelephone Operator Permit or verification card of a
third class or higher radiotelegraph or radiotelephone license. The
Restricted Radiotelephone Operator Permit or verification card of a higher
class license must be posted or kept on the operator's person (Rule
83.165). For vessels requiring a radiotelephone installation, the opera-
tor must have a third class radiotelephone operator permit.
4.6 APPLICATION FOR OPERATOR PERMIT
Field offices will accept applications filed on FCC Form 753 for the Re-
stricted Radiotelephone Operator Permit if the applicant makes a satisfac-
tory showing of immediate need for a permit for safety, and if the
application is presented in person by the applicant or his agent. How-
ever, this lifetime permit is usually obtained by mailing an FCC Form 753
to the FCC at Gettysburg, Pennsylvania 17325. No oral or written exam-
ination is required.
Mailing addresses for Commission field offices are listed below. Street
addresses can be found in local directories-under "United States Govern-
ment". Address all communications to "Engineer in Charge".
Alabama 36602, Mobile California 92101, San Diego
Alaska 99501: California 94111, San Francisco
P.O. Box 644, Anchorage
California 90731, San Pedro
California 90012, Los Angeles
4-2
4.7
Colorado 80202, Denver
District of Columbia
20554, Washington
Florida 33130
P.O. Box 150, Miami
Florida 33602, Tampa
Georgia 30303, Atlanta
Georgia 31402,
P.O. Box 8004, Savannah
Hawaii 96808, Honolulu
I[linois 60604, Chicago
Louisiana 70130, New Orleans
Maryland 21202, Room 819
Federal Building, Baltimore
Massachusetts 02109, Boston
Michigan 48226, Detroit
FEES
Minnesota 55101, St. Paul
Missouri 64106, Kansas City
New York 14203, Buffalo
New York 10014, New York
Oregon 97204, Portland
Pennsylvania 19106, Phila-
delphia
Puerto Rico 00903, San Juan
Texas 77701
P.O. Box 1527, Beaumont
Texas 75202, Dallas
Texas 77002, Houston
Virginia 23510, Norfolk
Washington 98104, Seattle
Applications for any license must be accompanied by the appropriate fee,
ifany. The nearest FCC office should be consulted for information regard:
ing application or filing fees.
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SECTION 5
INSTALLATION
Dial GENERAL CONSIDERATIONS
The RAY-48A may be installed in any convenient location; however, it
must not be exposed to salt spray. The mounting bracket permits both
horizontal and vertical mounting (to the Overhead, ona shelf, or to
a bulkhead, for example). Outline diagram Figure 5-1 shows dimen-
sions to drill holes for the mounting bracket,
Bae CONNECTING 12V POWER SOURCE
Refer to specifications in Section 1 for supply voltage and current re-
quirements. As shown in Figure 5-2, connect positive lead (RED) of
power cord to positive battery {+) and the negative lead (BLACK) to
negative battery (-). A fuse hatcier is connected in series with the
positive lead of the power cord. An 8 ampere fuse is provided for
short circuit protection. This fuse will blow if the battery leads are
connected incorrectly.
CAUTION
Do not connect the RAY-48A toa positive-ground
electrical system (battery (+) connected to hull).
CAUTION
Never replace fuse with greater than 8A or serious
and extensive damage will result.
The power cord is designed to carry the required current without undue
voltage drop. If a longer run is needed, use conductors of adequate
gauge for the added length under full transmitting load, and make cor-
rections directly to the battery. Wherea separate power supply is used
for converting ship's 32-volt or 115-volt supply to 12 volts DC, it should
be located within the length of the RAY-48A power cord.
Shas: GROUNDING
Special grounding is not necessary for the radiotelephone installation.
However, when the radiotelephone is mounted on an ungrounded surface,
the mounting yoke should be grounded to the hull. Bare copper wire or
shielded braid is suitable as a grounding conductor.
Br
it
22t Sag
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7
tts
ie : oett
2 is
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we
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ee
oi {
a anpsits
Seti oot Mews
“AD at
12 2p
(Cilateem)
Peoat
(7.29 cm)
Bralt25
(13.0 cm)
(sial5"em))
Figure 5-1 RAY-48A Outline and Mounting Dimension
coaxial cable
External speaker
2 conductor cable
@)
Mounting bracket
Figure 5-2 Installation of the RAY-48A
SELECTING AND INSTALLING THE ANTENNA
If in doubt concerning installation of an antenna, your dealer from whom
you purchased the RAY-48A will be able to advise which type of antenna
and mounting is best suited to your craft.
Should you install the antenna yourself, hardware and mounting instruc-
tions will be furnished with the antenna. It is recommended that type
RG-8/U coaxial cable be used where the cable length exceeds the length of
cable provided with the antenna.
Be sure that the mounting surface is strong enough, or that it is adequately
reinforced to withstand wind and heavy weather. If a backing plate is
needed, its thickness should be at least 1/4-inch for steel and 3/4-inch
for wood.
Some of the locations for the antenna on various types of craft are illustrated
in Figure 5-3. It is desirable to keep the coaxial cable as short and direct
as consistent with a good antenna location. When a compromise must be
made, the antenna should receive preference and be mounted in the highest
and clearest location, regardless of the cable length. The coaxial cable
is completely shielded and will not pick up interference. There is some
radio frequency power lost in the cable; however, the typical pleasure craft
installation will not require a cable of such length that this will be of sig-
nificance.
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ie Fag ae Sat
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Figure 5-3 Typical Antenna Locations on Various Types of Craft
535 INSTALLING ADDITIONAL CHANNELS
Installation of crystals, adjustments, tune-up and other requirements to
activate additional channels must be performed by an FCC-licensed tech-
nician. Instructions for alignment and adjustment are provided in Sec-
tion 7.
5.6 MOUNTING MICROPHONE AND EXTERNAL SPEAKER
The microphone holder provided with the radiotelephone can be mounted
to the case of the unit by removing the paper from the bracket. The bracket
has a glue already attached to the metal, and will adhere instantly to the
metal case. To mount the bracket at another location, two number 6 sheet
metal screws are provided. Plug the microphone connector into the micro-
phone jack located on the front panel of the unit.
If an external speaker is to be installed, connect the speaker (4-ohm impe-
dance and more than 3 watts input power) to the plug provided with the unit.
Connect the external speaker plug into the external speaker jack located in
the rear of the unit.
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SECTION 6
THEORY OF OPERATION
RECEIVER (Figure 6-1)
The receiver utilizes a double-conversion superheterodyne circuit with
crystal control for both local oscillators. First mixer Q12 receives channel
injection frequency at 16.9 MHz below the signal frequency from amplifier
Q23. First local oscillator (Q21) frequencies are generated in the 46 MHz
range and tripled into the 139 to 145 MHz range by tripler stage, Q22.
Weather channel crystals ¥Y213 and Y214 are in separate circuits from the
channel crystals Y201 through Y212. Center position toggle switch $2
activates the selected weather crystal and excludes operation on the two-
way channels. An example of first conversion for WI is that the local
oscillator crystal frequency at 48.5500 MHz is tripled to 145.65 MHz and
mixed with the signal frequency of 162.550 MHz, producing the inter-
mediate frequency of 16.9 MHz. This is applied to crystal filter FL-1,
which rejects the unwanted difference frequencies and provides the de-
sired passband.
Crystal filter FL-1 provides a 6dB bandwidth of 13 kHz at the 16.9 MHz
intermediate frequency. Direct-coupled IF amplifiers Q13 and Q14 am-
plify the 16.9 MHz signal which is coupled by L141 to the base of second
mixer Q15.
Second local oscillator (Q16) is crystal-controlled by Y161 at 16.455 MHz.
This frequency is coupled to the emitter of Q15. The difference between
the first IF (16.9 MHz) and 16.455 MHz generates the second IF which is
455 kHz.
The 455 kHz output from the second mixer is fed through L151 to the input
of an integrated circuit IF amplifier (Q17). The 455 kHz output of Q17
drives a double-diode discriminator. The audio output of the discriminator
is amplified by audio amplifiers, Q18 and Q19.
The audio output from the discriminator is fed to the squelch amplifier and
audio amplifier through the volume control. Audio output is provided by the
audio IC to the speaker.
The squelch circuit consists of the front panel squelch control (VR331),
noise amplifier (Q31, Q32) and two switching transistors (Q33, Q34).
The squelch circuit operates by detecting the effect a received radio signal
has upon the noise output of the discriminator. When a radio station signal
is received, this noise level is reduced in proportion to the strength of the
signal. The sensitivity of the squelch circuit is controlled by the setting
of the front panel SQUELCH control and the squelch level control (VR191)
on the PC board.
When no radio station signal is being received, the noise output from the
discriminator is fed through the two squelch controls to the input of the
noise amplifier (Q37,32). The amplified noise output is applied to the base .
of the switch transistor (Q33) causing it to conduct. When Q33 conducts,
forward bias is removed from Q34, thereby turning it off. When Q34 is
turned off, a positive voltage is applied to the emitter of the first audio am-
plifier (Q18) turning it off and silencing the speaker.
MIC
SPEAKER
VOLUME
a
=
<
2
=
When a radio station signal is received, the noise input to Q31 is reduced,
causing transistor Q33 to turn off. When Q33 is off, Q34 is forward biased,
thereby removing the positive voltage applied to the emitter of audio ampli-
fier transistor (Q18) and permitting the audio signal to pass through to the
speaker.
5 &iim>
SQUELCH
{F AMP
Qi
Q33, Q34
ve
uw
°
4
=
°
a“
CLIPPER
D622, D623
6.2 TRANSMITTER (Figure 6-1)
The transmitter crystal oscillator transistor (Q41) uses 6. 5 MHz fundamental
crystals. The oscillator output is coupled to the modulator circuit. The
signal modulated by the audio signal from the audio section is fed to ampli-
fier (Q43) and tripled by Q44. Then the 19.5 MHz output from the tripler
is inductively coupled to the following doubler Q45. The doubled 39 MHz
output is coupled to the next doubler circuit by the same method, and that
doubled 78 MHz output to the next doubler circuit. The final frequency is
obtained by the last multiplier (Q47). All multiplier circuits consist of a
transistor and double tuned tank coil to eliminate the unwanted harmonics.
The output from the last doubler is fed to the following predriver amplifier
(Q48), amplified, and then coupled to the second predriver. The second pre-
driver, driver, and power transistors (Q49, Q50, O5t)-are located on the RF
power amplifier PC board. The output of the power amplifier is coupled to
the 50-ohm antenna through the antenna filter and relay.
2ND MIX
Qis
NOISE AMP
DOUBLER
Ques
DOUBLER
Q4us
16.445M
Qf
RECEIVER
DOUBLER
Q4u7
TRIPLER
MYA AOE LET
ery
TRANSMITTER
AMP
Q23
AMP.
Qus
ein tht EAE D SOLAN ISIE
BUFFER
AMP Q43
The transmitter audio amplifier circuitry consists of a dynamic microphone,
a transistor amplifier, an instantaneous speech clipper, and an audio roll-
off filter.
FILTER IF AMP
Q13, Ql4
osc
Q16
-e 6-1 RAY-48A System Block Diagram
Figur
r
The RF power reduction is made by reducing the DC voltage supplied to |
the driver and power amplifier. The 25W and 1W power change circuit |
consists of changeover switch and voltage control VR711. When the switch |
is in the 25W position the DC source power is directly supplied to the RF |
circuit. When in the 1W position the DC voltage is reduced so that the RF |
|
|
|
|
|
|
|
|
1ST MIX
Qi2
TRIPLER
Q22
AMP.
Q4u9
MOD
pai
power output is not more than 1 watt.
OoIKAH
osc
Q2)
AMP
Q50
osc
Qui
CO
—)
i
RF AMP
Qi
POWER
AMP Q51
\l/ ANTENNA
FILTER
SECTION 7
MAINTENANCE
Ze GENERAL
For optimum performance, periodic checks should be performed by qual-
ified personnel. Servicing may be simplified by reference to the sche-
matic diagram. To localize the cause of trouble, eliminate those sections
of the equipment which are operating normally. When the faulty section
is localized, its individual components are tested to identify the problem.
Wiwd BASIC MAINTENANCE PROGRAM
For maximum performance a bimonthly program of preventive maintenance
should include the following:
ie Check plugs, connectors, fuses, and fasteners for pro-
per seating. Clean electrical connections.
7 Remove any accumulated dust with a small brush or dry
compressed air.
3%, Check battery connections. Add water and clean term-
inals as required.
4, Check the antenna system carefully. Look for corroded
coaxial plugs or socket connections as well as cracked
coax jacketing. Check isolation of center coax conductor
and outer shield. Check resistance between connections.
De Check input power system for loose fuse connections and
corrosion at plugs and receptacles. Check wiring for
kinks, pinches, and abrasions.
6. Check radiotelephone for optimum performance. Receiver |
sensitivity should be better than 0.5 uV for 20 dB quiet-
ing. Transmitter output should be 25 watts at nominal
input voltage (13.6V).
Te: Check transmitter power to antenna system using a thru-
line type RF wattmeter. Power should be 25 watts at
nominal input voltage (13.6V).
ts » z BAL 5 7
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wii 3-2 y a aa Se pa
Ht so FS LOE SES
we Check antenna reflected power using a thru-line type
wattmeter. Reflected power should be negligible if the
antenna and transmission line are working properly.
The following test instruments and acc
essories are required for aligning,
checking and maintaining the RAY-48A.
Equipment
AC VTVM (RF) /Voltmeter
Frequency Counter
Oscilloscope
Power Supply
(1356.VDG.07.5 amperes)
Signal Generator (AF)
Signal Generator (RF)
VOM
Dummy Load (50-ohm)
Wattmeter
Frequency Meter /Signal
Generator)
Deviation Meter
Sweep Generator
Manufacturer and Model No.
Hewlett Packard HP410
Hewlett Packard HP5382A
Tektronix 475 (200 MHz) or 335
(35 MHz)
Sorensen
Hewlett Packard HP200CD
Hewlett Packard HP202H
Simpson 260
Bird 8130
Bird 43 (with model 50C ancdeLG
element)
Singer FM10C
Measurements 920
As available
Tax) INSTALLING ADDITIONAL OR NEW CHANNELS
Crystals for six transmit and receive channels (6, 16, 22A, 68, 26 and
28) and two weather channels (162.550 MHz and 162.400 MHz) are al-
ready installed for immediate operation.
Additional or new channels will require installation of a transmit and re-
ceive crystal for each channel. Your local marine, USCG Auxiliary, or
USCG office will be able to furnish information on new channels in your
area.
Installation of new crystals requires that your unit be aligned for the
exact transmit and receive frequencies. FCC regulations require that
frequency adjustments be made by the holder of a First or Second Class
Commercial Radiotelephone License, and that the change or addition be
logged in by the licensed technician.
To determine the crystal frequency needed for the channel desired use
the following formulas:
Receive crystal oscillation freq (MHz) = Channel receive freq (MHz)
3
Transmit crystal oscillation freq (MHz) = Adjustment freq (MHz)
24
NOTE
A channel decal sheet, on which numbers for all
VHF/FM marine band channels are printed ona
transparent paper, ts supplied with the unit. When
adding new channels, peel off the required channel
numbers from the decal sheet and affix them to the
channel selector dial.
When replacing crystals the basic part number, 394-7224-G (x), which
identifies the crystal pair, must be specified as well as the specific
channel designation.
NOTE
Only crystals designed specifically for this
equipment should be installed. Other crys—
tals may appear to function satisfactorily,
but will not be dependable under all condt-
tions and will not maintain carrier frequency
stability within legal limits.
|
COREL, poate
eat AA
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a See Tet, Cee eer
ech Aon tee
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|
L
Selector
Channel Position Use
6 1
16 : 2
22A 3
26 4 (Refer to Table 7-1)
28 5
68 6
WX (W1)
(W2)
Table 7-1 furnishes a suggested plan for installing additional or new
channels.
Table 7-2 specifies Simplex and Duplex channels and their corresponding
crystals. To determine the crystal frequency required use the formulas
which follow.
Receive crystal oscillation freq (MHz) = Ghanne) a ina: es,
Transmit crystal oscillation freq (MHz) = Adjustment freq (MHz)
24
Table 7-1 Recommended Commercial and Noncommercial :
Channels for the RAY-48A
TYPE OF COMMUNICATIONS
Points of Communications
Channel
Number
Commercial | Noncommercial
DISTRESS, SAFETY & CALLING
Intership, ship-to-shore
16
(mandatory)
INTERSHIP SAFETY
Intership, ship-to-coast
06
(mandatory)
USCG LIAISON
22A
26, 28 Marine Radiotelephone Operators
PORT OPERATIONS
Intership, ship-to-coast
6571667, 12703,
14,74, 20
NAVIGATIONAL
Intership, ship-to-coast
ifs
ENVIRONMENTAL
W1, W2 Receive only| Receive only
Ship receive only (2)
077.097. 110) COMMERCIAL i
lh Ge Oe Intership, ship-to-coast
79, 80
i OS, 2 COMMERCIAL
88 Intership
NONCOMMERCIAL 1
Intership, ship-to-coast
057 697 71, NONCOMMERCIAL 2
78
LO 2 NONCOMMERCIAL 1
Intership
Table 7-2 Crystal Frequencies Required for Essential Channels toh FREQUENCY ADJUSTMENT
RECEIVER FREQUENCY (MHz) TRANSMITTER FREQUENCY (MHz) the Install the receive and transmit crystals in accordance )
Frx Shey Fx ay (RX) Fry FXTAL (TX) with Tate Pe. Allow 15 minutes for the crystal oven
i to stabilize, after which the channel frequency may be
z 156.3 139.4 46. 46667 6.51250 set by adjusting the capacitors listed in Table 7-3.
: 7 156.35 139.45 | 46.48333 6.51458
i 8 156.4 139.5 46.50000 TS56Gnu GES GGT : Table 7-3 Crystal Trimmer Capacitors for Each
9 156.45 139-55 HG E5667 156055 Gunes Position of Channel Selector Switch
10 156.5 139.6 46.53333 156.5 6.52083
11 156.55 139.65 46.55000 156.55 6.52292
12 156.6 139.7 46.56667 156.6 6.52500 Channel Trimmer Capacitor
13 156.65 139.75 | 46.58333 156.65 6.52708 Position Transmit Receive
14 156.7 139.8 46.60000 156.7 6.52917
15 156.75 139.85 HG Ot G67 = |) een ee eee eee 1) (ehis6) VC411 VC201
16 156.8 139.9 46. 63333 6.53333 2 16 VC4I2 VC202
a 156.85 139.95 46.65000 6.53542 Ba 45: VC413 VC203
18 156.9 140.0 46.66667 6.53750 i = 26 VC414 VC204
19 156.95 140.05 46. 68333 6.53958 5 28 VC415 VC205
20 161.6 144.7 48 . 23333 6.54167 6 68 VC416 VC206
22A Teal 140.2 46 .73333 6.54583 Z VC4I7 VC207
24 161.8 144.9 48. 30000 6.55000 8 VC418 VC208
25 161.85 144.95 48.31667 6.55208 9 VC419 VC209
26 161.9 145.0 48 . 33333 6.55417 10 VC420 VC210
DY 161.95 145.05 48.35000 6.55625 11 VC421 Ve214
28 162.0 145.1 48. 36667 6.55833 12 VC422 VC212
. 68 156.425 139.525 | 46.50833 157.425 6.51771 W1 Ve2i3
70 156.525 139.625 | 46.54167 157.525 6.52188 W2 VC214
W2 48.50000 Dee Set the transmitter frequency by sampling the transmitter
output with a frequency counter, adjusting the frequency
to within + 50 Hz of the assigned frequency.
48.55000
Se Set the receiver local oscillator frequency by connecting
a frequency counter to a pickup loop set near the local
oscillator or to TP231.
7-6 4_7
PRELIMINARY ALIGNMENT AND CHECKOUT
Receiver
a.
Sensitivity
Quieting: Not more than 0.5 microvolt for
20 dB quieting.
Sinad: Not more than 0.35 microvolt for
12 dB Sinad.
Audio Power Output
A one-millivolt RF signal, modulated with 1000
Hz at 3.3 kHz deviation should produce not less
than 1.5 watts audio at the speaker.
Squelch Sensitivity
Not more than 0.5 microvolt at threshold.
Tight squelch not more than 2 microvolts.
Transmitter (Figure 7-1)
Power Output
Te Connect RF wattmeter and 50 ohm load to
antenna jack.
I. Set POWER switch to HIGH and channel
selector switch to channel 16. Key the
transmitter and check for rated output
power (25W nominal) at 13.6 volts.
os Set POWER switch to 1W. Check for not
more than 1W output. If necessary adjust
VR711 to obtain no more than 1W output.
Modulation Deviation
itis Connect an audio signal generator across
microphone input terminal and adjust fre-
quency to 2500 Hz at 4 mv with suitable
capacitive isolation.
RF OUTPUT POWER ( watts )
2 Key transmitter on channel 16 and increase
audio level until deviation is 3.5 kHz. IJn-
crease audio level an additional 20 dB.
Si Swing generator frequency from 1 to 4 kHz
and set deviation control VR622 such that
5 kHz is not exceeded. Check remaining
channels to assure that 5 kHz deviation is
not exceeded.
4, Replace microphone.
Dy. Check that + 5.0 kHz is not exceeded on
a loud whistle or yell, and the deviation
does not go below + 3.5 kHz when a
normal soft voice is used.
1
T
10 11 12 13 14 15 16 17
POWER SUPPLY VOLTAGE ( volts )
Figure 7-1 Output Power Vs Supply Voltage
TRANSMITTER ALIGNMENT
NOTE
Microphone PRESS TO TALK switch must be de-
pressed to obtain drive.
SerWeegs.
seca ss j
~
a
a é
&
= Gra
622
ORS
Oscillator and Buffer
Set channel selector to any position where a crystal is
installed.
Using VOM, check dc drive developed at TP441 (input
of the transmit multiplier). If oscillator is operating
properly, voltage will be approximately 4.2 Vdc. With
no drive it will be approximately 0.2 Vdc.
Tune L412 and L431 for a maximum dc indication at TP441
with channel selector set to channel 16.
Transmit Multiplier
Set channel selector to channel 16.
Connect VOM to TP451 and tune L441 and L442 for maximum
indication. Readjust L441/L442 as necessary for ap-
proximately equal indications on channels 6 and 26.
Voltage should be approximately 0.25 Vdc with drive
from the transmit oscillator and approximately 0.12
Vde with no drive.
Connect VOM to TP461 and tune L451 and L452 for maxi-
mum indication. Readjust L451/L452 as necessary for
approximately equal indications on channels 6 and 26.
Voltage should be not less than 0.5 Vdc with drive.
Connect VOM to TP471 and tune L461 and L462 for maxi-
mum indication. Readjust L461/L462 as necessary for
approximately equal indications on channels 6 and 26.
Voltage should be not less than 0.6 Vde with drive.
RE Peweis-Ampiifier.
Connect RF wattmeter and 50 ohm load to antenna con-
nector J1.
Set channel selector to channel 16.
Set RF PWR switch to 25W.
If power output is indicated at J1, adjust trimmers VC471,
WCHss) VCHoI, VC492, VC501, VC502, VC5i2 and, VC513
for maximum power output.
TOK.
so
1Oz
NOTE
If no rf power output is indicated on the watt-
meter, tune the individual stages (steps 5
through 10).
Connect VOM to TP501.
Adjust capacitors VC471, VC483, VC491, and VC492 for
maximum indication.
Transfer VOM to TP502.
Adjust VC501 and VC502 for maximum indication.
Adjust VC512 and VC513 for maximum rf output on the
wattmeter.
Again touch up all tuning capacitors for maximum rf
output.
Low Power Output Adjustment
Set RF PWR switch to 2W.
Adjust VR711 for one watt RF output.
Modulator Deviation
Connect 50 ohm RF load to antenna terminal.
Connect AF frequency generator to microphone input term-
inal using 0.47 microfarad for DC isolation.
Adjust AF generator for 2500 Hz at 4 mV output.
Preset deviation control VR622 for maximum deviation.
Preset deviation balance control VR621 to its center posi-
tion.
Adjust microphone gain control VR611 to obtain 3.5 kHz
deviation.
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Ts Increase audio level by 20 dB and adjust VR622 to limit fe Connect AC VTVM to TP211. Carefully adjust L215
deviation to 4.5 kHz, making sure of plus and minus for equal output indications with channel selector
deviation. on channels 6 and W2 (if installed, otherwise on W1).
ds. Connect oscilloscope to TP121. |
NOTE
a. Connect a sweep generator (138-146 MHz) to TP211. :
Balancing must be done by adjusting 4, Carefully adjust L221, L231 and L232, L233 for maximum
VAR GOM: ; amplitude, and waveform pattern shown below.
8. Replace microphone and check that deviation does not |
exceed + 5.0 kHz ona loud whistle or yell. Also check
SaoNae E 3dB
that deviation does not go below + 3.5 kHz during nor-
mal quiet speech.
S66 18.5 kHz Filter (L621)
Filter L621 is located between the limiter and modulator circuits, and is
factory-tuned to 18.5 kHz (per FCC regulations, Part 83). The tuning
of this filter is quite broad, and will normally require no field servicing.
To check this function, proceed as follows: 139.400 142.500 145.650
MHz
ike Connect AC VTVM across R627. Wes ber RF Amplifier
A). Preferred Method
Pe Insert a 1000 Hz, 4 mv signal at the microphone Eee
ication across R627. ue Connect a sweep generator (155-163 MHz) to antenna
input connector J1, and an oscilloscope to TP121.
ci Adjust input signal frequency to 18.5 kHz at 4 mV.
The output across R627 should be no less than 50 dB 2. Carefully adjust coils L111, L112, L113 and L121 for
below that at 1 kHz. maximum amplitude and waveform pattern shown below.
Lod RECEIVER ALIGNMENT f
CAUTION 3dB
Use extreme care when tuning the tank
cotls of the local oscillator and rf amplifier.
The alignment of these circuits is critical.
eel eel Local Oscillator
NOTE F 156.275 159.400 162.550
MHz
In some sets the PCB marking incorrectly
imaicates 2 Meron Lots, Loti ts not :
n ; Alternate Method (sweep generator not available)
adjustable.
I Connect rf signal generator, set to mid-band (159.4
MHz) at 100 mV, to antenna input J1.
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Temporarily connect a 1000 pF capacitor across L113.
Connect AC VTVM to the junction of C102/C105 (top
Of lSIu ee. P
Adjust L111 and L112 for peak/minimum indications
respectively.
Connect AC VTVM to gate of Q11 (at junction of C104/
R111/R112). Retune L111 for peak indication.
Remove 1000 pF capacitor from L113.
Connect AC VTVM to drain (D) of Q11 (junction of C119/
L113). Adjust L113 and L121 for maximum/minimum
indications respectively.
Connect AC VTVM to gate of Q12 (junction of C123/C124).
Retune L113 for peak indication.
IF Amplifier
NOTE
The channel 16 receiving crystal frequency
must be accurately adjusted prior to align-
ment.
Connect VOM, set to the 1V scale, to TP181.
Connect audio voltmeter across speaker terminals.
Connect a signal generator to TP151. Set frequency
to 455 kHz +50 Hz. Set the channel selector to a
channel without a crystal.
Tune L151 and L171 for maximum indication at speaker
~ output.
Tune L172 for zero discriminator voltage at TP181. Re-
move the 455 kHz generator.
Connect rf signal generator to antenna connector (J1).
Set output for 156.8 MHz +50 Hz, modulated 3.3 kHz
deviation at 1000 Hz.
Set channel selector to position 2 (ch 16) making sure
that the receive frequency has been set within limits
(+ 100 Hz).
le
LA
8.
8.
i
2
10.
Recheck discriminator for zero voltage at TP181 without
modulation. If not within 0.15 volt, reset L172. This
will produce a symmetrical waveform at the speaker.
Fine tune signal generator so that a symmetrical audio
waveform is observed on oscilloscope. Reduce generator
level so that the audio waveform becomes noisy.
Tune L122 and L141 for maximum audio output.
TROUBLESHOOTING
Receiver Operational Checks
Inject a dc-isolated, 1 kHz 1 mV rms signal at TP181.
Approximately 5V rms should appear at speaker
terminals with VOLUME control advanced fully clock-
wise.
To check injection from local oscillator, connect DC
VTVM to TP231. This voltage should be approximately
1 Vdc, and 1.5 Vdc in ch 6 and WX positions.
With channel selector in position 1 (ch 6), inject a sig-
nal at the antenna connector. Receiver quieting should
be 20 dB quieting for a 0.5 microvolt input. With no
signal, noise should be present.
With no signal, rotate SQUELCH control clockwise to
quiet the noise. Inject ch 6 signal again and note that
squelch appears with less than 0.5 microvolt input.
Transmitter Operational Checks
Key transmitter on ch 16, and check following dc vol-
tages:
Test Point DC Voltage
TP 441 ed)
TP 441 0.2 (without osc drive)
essa 0.25
TP 461 OAs
slates tava 0.6
ne S04 0.1
TE 2 0.3
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Tes, Check for 25W/1W power output at antenna connec-
tor J1.
Bee Check for proper deviation: insert an audio tone
of 2.5 kHz at not less than 40 millivolts into the
microphone input. A frequency-modulated devia-
tion meter should indicate 5 kHz deviation.
NOTE
Se et ee a
If an AF signal generator is unavailable,
oie
whistling will provide an approximate
indication of deviation.
pores
Tas) Receiver DC Voltages
taba eie met
Set up the front pane! controls as follows:
Control Position
Channel selector 1 (ch 6)
VOLUME midrange
SQUELCH fully CCW
WX OFF
Using a VTVM, check voltage at points indi-
cated in Table 7-4.
TAG
Table 7-4 Receiver DC Voltage Chart
Transistors
Emitter Collector
on
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2
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Field Effect Transistors (FET)
Gate 1 Gate 2 (V) Source
Weg
3156
Integrated Circuits (IC)
Transmitter DC Voltages
Set channel selector position 6 (ch 16) RF PWR
switch to 1W.
Using VTVM, check voltage at positions indicated
in, ables /—5.
Tay
Table 7-5 Transmitter DC Voltage Chart*
Base Emitter
w
5meGOu. 7)
Dan On65)
(0.65)
(0.65)
aon
ON NN ST oO
SO SO © SS 2 So So =
1
AzaO)
0.3
Opat
eee
O57.
0.2
0.7
0.6
0.4
* Transmitter must be keyed on an active channel.
Collector
Geo
10.0
10.0
10.0
10.0
13%
135
1335
USE, &
13z-5
SECTION 8
SCHEMATIC DIAGRAM AND PARTS LIST
This section contains the schematic diagram and a list of electrical and mech-
anical components arranged according to their circuit symbols. Components
in the 100 series are in the receiving circuit, while components in the 400
series are in the transmitter. Note that on schematic diagram, Figure 8-1,
electrolytic capacitor values and working voltages indicated (e.g., C191
1/16; C621 (emitter of Q62) 22/6.3) the first number is the value in micro-
farads; the second is the voltage rating.
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RAY-48A PARTS LIST
Ql2 Q13 Qi4 als QI7 Q18
3SK39 2SC381 2SC38! 28C38! TA7O61 28c372
Ist MIXER IFAMP IF AMP 2nd MIXER IF AMP ache ees AUDIO AMP cies 1/16
lize *s 8 Ciss ce! 5 Circuit Circuit
x eee 3 SNe. 5 g iS . Symbol Description Part Number Svmbol Nescrintion Part Number
sl 3 2] at x ciaz I/16 rs
ae = to 10 BS. Bien M Capacitor, Fixed Capacitor, Fixed
F zlsfole! “Ts erate § slo] 8% xl] oy 3
8352548 38 ssa ale BSoSh aiepelal S 8155 afte] 8 “ z p C101 5pF, Mica 235-7053P1 c184 100uF/6.3VDCH, Electrolvt.235-7199P12
= Ss OL6 o}N + $ aes 2 o
a7slels7e Sic ate x Sls one Beet ral of erelelse elgilsec S = €102 1OpF, Mica 235-7355P401 ¢185 luF/16VDCW¥, Electrolytic 235-7395P46
a “a ES c 313 z[z/8 3/8] 5/5) 5] e[s]e/=] ef eYns8 s)2|] 3 C103 7pF, Mica 235-7053P3. C186 .O2uF, Mylar 169256-48
= Fie is | ols le z 5 C104 47pF, Mica 235-7355P6 «C187 Not tuced
eon 1 105 .5pF, Mica 587968-75 188 Not used
RI88 100 R $ els 218 2 3 C106 Not used C189 Not used
2 Seats oy
ore sje 88 os C107 Not used C190 Not used
= 108 Not used C191 luF/16VDCW, Electrolytic 235-7395P46
ae
us ie eS S C109 Not ase: ‘ 192 100uF/6.3VDCW, Electroly. 235-7199P12
Q22 923 Qi6_ gx Q3! 10mx mae aes 2 < 110 .00luF, Ceramic 235-7195P C19 10uF/6.3VDCW, Electrolyt. 235-7199P4
25C381 TRIPLER: 95 15P 2SC381 AMP casy op 2sc3si 29 250372) exiaiGol NOISE i 2 ou SQUELCH : ait eee ee nes aes Med St EES eee
| c221 47° Bit 3 L231 7P L238 a +fve3y 3 x . c112 .02uF, Ceramic 235-7207P32 C195 ylar 235-7396P13
ae Sac fle || ee elds a a ela = 5 ' C113 .001luF, Ceramic 235-7195P2 C196 6VDCW, Electrolytic 235-7199P4
ce NP os GON ne phn gee | = = T 2 = fiat TR Is © —HoX (5523) » 3 wee ’ 114 .02uF, Ceramic 235-7207P32 C197 330uF/16VDCW, Electrolvt. 169256-45
no8, 8(e4 | eee = enn o: | 2 bdx 8 § bs Mar S8%3o4 < won 8 | C115 Not used cigs Electrolytic 235-7305°55
Shas crus oy as 3 847 erase OSS a te x gusset S| 1aTy al C116 .O01uF, Ceramic 235-7195P2 C100 235-7396P13
f| © be Ok Swe Face asl R22647 “mea | get R236 47 | ek: S o 2 t ae ODF, Mi ae Seana, 620) 235-7053P)
if = pF, 1ca a! 20 =-/033°)
es RS ae Genie S25 218 as ars —— Bes c119 lpF, Mica 235-7355P31 c2n2 235-7053P1
Wy eas avo | Sie Sto a £ C120 Not used C203 235-7N53P)
a ei sg zt C121 5pF, Mica 235-7053P1 C204 235-7N53P}
C122 -O2uF, Ceramic 235-7207P32 C25 235-7053)1
Q24 043 Q45 Q46 Qi9 | 45 i on 53D}
Se 28¢38! a. 2Sc784 . 2SC784 eel AN2I4 AUDIO AMP | ae pe nee Pee ee oe
= BLER O i a 2 JM - n7 235-7053)
ee eee a pS Se ee ag 3 oh tae a ee ree g C125 -O0luF, Ceramic 235-7195P2, 208 235-7053
5 5 gs 2 ext s x : z C126 .02uF, Ceramic 235-7207P C290 235-7053?)
z : BF heals 33 S -7207P32 C210 ~75 391
mi " Ss ft es es OSN 1! cig 1716 =) C127 .O2uF, Ceramic 235 C21 235-7053
3 : = pe aeal w |. SE ip a = C1238 .OOluF, Ceramic 235-7195P2 C211 235-7053P1
Teste 4 La ow AY Sie os ais 8 ie 3 €129 “OOluF, Ceramic 235-7195P2¢212 235-7052? 1
P| Béks0 lols Pat tate ole) OF vin “25s Sin | 19/8 2 y ao3i ) C130 Not used C213 235-7053?)
b nsec. & tito Cb Slot ole Oo.” * m2 Ale 2 AS mr Pe arcr) © = Tv > z SOs ee pai chs thal
a= ast =! 2 ne 3 3 mee 223 stat Sr 5 Shalt oral 2T3 Saal 3 Sts] C131 1000F, Mica 235-7355P33 C216 235-7053P
|} sf8[ 25 F2inda Svar eeea ed ae rj}ol 3/8 2 o/s) e]e ca a aa Eh ba je 5 «;o| C132 .02uF, Ceramic 235-7207P32 C215 .OQOluF, Ceramic 235-7195P2
’ Zizhe a -[¢ vit a a tie] oe 2 z]=} f=] ol} a] 2° | | U 3 - 1 igs ore
+ lk ok mole] & *|%s cae om || la Sra 5 nC Sige oe as ae ” a C133 -O2uF, Ceramic ae c2l6 -OOluF, Ceramic 235-7195F2_
T RLS 27 atest elx 22 Sian ail t C13 -O2uF 235-7207P32 C217 100pF., 235-7355P33
78 TO Pesez2 sa ae C135 33p 235-7053P41 = c218 5pF, Mica 235-7053P12
° 5 6 volo > pasted bs 5 = eS
3 on om C136 0 235-7207P32 C219 .OOluF, Ceramic 235-7195"2
= eS | laeielal »
| Q62 Q6! C220 Not used
= Tal 25¢372 28¢372 C137 through C150 aT 22] 235-7355?6
<< y C229 A265 Q5D7
O50 mm 949 aaa Q47 se MiC AMP = MIC AMP. : C222 235-71952
ae ta ascset Sl nas Seite y c151 .O0luF, Ceramic 235-7195P2 (223 235-7355P201
AMP OUBLER ~¢ 8 | 3 152 47pF, Mica 235-7355P6 (224 235-71 9552
30! vcag: 3OP } rel ax ae 0 } - c . 169256-49 on 935 _762072
om 2 g $454 5 .luF, Ceramic = C225 239-/053P 42
rae 2 & Hori I | | C154 .02uF, Ceramic 35-7207P32 ¢226 935-71 0522
2 = Ba ave (Ale2e( te |p ee. S32 G C155 OOluF, Ceramic 235-7195P2 6227 235-7] 9002°2
iS 2 3 £/a737 ST3Ts St 458) 438 1s ¢228 flot used
35 5 Somer Smee om a? | S018 Bla % C156 through C160 Not used 229 Not usec
a aay a nN py olN © aE “
3 T 2» 6 R628 100 om ™ 13 8 C239 lot used
S 3s | — aa | 2 ; C161 3300F , Mi 235-7053P305 (231 Ink, Mica 235-75202
o - = = C SSQ0DF, Mica Ecol Dine ca 3 23
“ a 8 Sas = C162 47pF, Mica 235-7355P6 C232 4InF, “ica 235-7355°6
2 | = C163 330F, Mica 235-7053P41 6933 .O2uF, Ceramic 235-72N7232
«5 Sot C164 0.02uF, Ceramic 235-7207P32 C224 -N01luF, Ceramic 235-719552
i J C165 100uF, 16V, Electrolytic 35-7199P12 C225 Not used
: C166 Not used 236 235-7355°201
C167 .047uF, Mylar 235-7352P185 ¢237 .ON1luF, Ceramic 235-719552
ee C168 Not used C238 pee Mica 235-705222
C169 Not used 239 2pF, Mica 235-7355]
BL 6 O | : a74_ | C170 Not used C240 Not used
; ' Q73 Q74 = PSR
is LAN 35 | SCHEMATIC DIAGRAM ; C171 .047uF, Mylar eee ga ne C241 -QOluF, Ceramic fie te
2 MIC_INPUT [x 25/ S C172 .047uF, Mylar 3o-/ C242 .O2uF, “vlar 9256-48
& ae ae el 3 VHF—FM RADIOT C173 047uF, Mylar 235-7352P185 ¢243 1OuF/16VDCH, Electrolvt. 235-7199°4
is = iS lhe Er EEHOME C174 O47uF, Mylar 235-7352P185 C244 .O0luF, Ceramic 235-719522
re NOTES C175“ 6BOpF, Mica 235-7355P422 C245 -O0luF, Ceramic 235-719592
ZO | C176 330F, Mica 235-7053P41
FUSE ea REO x \& 1) ALL RESISTORS ARE IN OHMS AND “«W7-S UNLESS OTHERWISE SPECIFIED . C177 470pF, Mica 235-7355P272 ¢301 through C310 Not used
SrAcKA {7 ' ; Feat Lies Ri) ee ae 178 470pF, Mica 235-7355P272
mi [oo * 8 2) CAPACITANCES FOLLOWED BY P ARE IN *.}CRO M.CRO FARADS OR PICO FARAOS ie ee Sse Thoepia: | "Ea4 ANF: Nites eo aes
ema te Cenrtute CONTRGE UNLESS OTHERWISE SPECIFIED C180 Not used es 22 33uF/6.3V, Electrolytic 235-7395°26
: re C181 .047 Mvlac 235-7352P185 313 .OluF, Mylar 235-7396P13
3) # SUBJECT TO CHANGE IN INDIVIOUAL UNIT C182 luF/16VDCW, Electrolytic 235-7395P46 C314 .OluF, “ylar 235-7396P13
C183 100uF/16VDCW, Electrolvtic 235-7199P12 C315 .OluF, Mylar 235-7396P13
r Figure 8-1 RAY-48A VHF FM Marine Radiotelephone Schematic Diagram
on
SSMS Hearth er SalI MEA AL denn
Circuit
Symbol Description
Capacitor, Fixed
C316
C317
C318
C319
C320
C321
C322
C323
C324
C331
C332
C333
C401
C411
C412
C413
c414
C415
C416
C417
C418
c419
C420
C431
C432
C433
C434
C435
C441
C442
C443
c444
C445
C446
C447
C448
c449
C450
C451
C452
C453
C454
C455
C456
C457
C458
C459
C460
C461
c462
C463
c464
C465
C466
C471
C472
C473
C474
C475
C476
.OOluF, Mylar
33uF/6.3V, Electrolvtic
-OluF, Mylar
22uF/6.3V, Electrolvtic
through C330
22uF/6.3V, Electrolvtic
33uF/6.3V, Electrolytic
.O2uF, Mylar
thorugh C410
15pF, Mica :
330pF, Mica
82pF, Mica
100pF, Mica
0.02uF, Mylar
0.02uF, Mylar
0.0022uF, Mylar
47pF, Mica
0.02uF, Mylar
through C430
0.02uF,
47pF, Mica
-O2uF, Mylar
-O2uF, Mvlar
threugh C440
82pF, Mica
-O2uF, Mvlar
47pF, Mica
-O2uF, Mvlar
.O2uF, Mvlar
I5pF, “ica
270pF, Mica
68pF, Mica
-O2uF, “4vlar
15pF, Mica
-OOluF, Mylar
.02uF, Mylar
O0.5pF, Mica
22pF, Mica
82pF, Mica
.O2uF, Mylar
22pF, Mica
-OOlUF, Mylar
0.5pF, Mica
-O2uF, Mylar
through C470
47pF, Mica
47pF, Mica
0.001luF, Mvlar
47pF, Mica
-OOluF, Mvlar
.O2uF, Mylar
Part Number
235-7396P1
Not used
Not used
Not used
Not used
235-7395P26
235-7396P13
235-7395P25
Not used
235-7395P25
235-7395P26
169256-48
Not used
235-7053P12
235-7053P305
235-7053P245
235-7355P33
169256-48
169256-48
235-7352P121
235-7355P6
169256-48
Not used
169256-48
235-7355P6
169256-48
169256-48
Not used
235-7053P12
235-7053P297
235-7355P25
‘ot used
Not used
169256-48
235-7053912
235-7396°F1
169256-46
587968-75
235-7355P201
235-7053P245
Not used
Not used
Not used
169256-48
235-7355°201
235-7396? 1
589968-75
169256-48
Not used
235-7355P6
235-7355°6
235-7396P1
235-7355P6
235-7396P1
169256-48
RAY-48A PARTS LIST
Circuit
Svmbo1 Description
Capacitor, Fixed
C477 -O2uF, Mylar
C478
C479
C480
C481 15pF, Mica
C482 7oF, Mica
C483
C484 -OOluF, Mvlar
C485 .O2uF, Mvlar
C486 O01luF, Mvlar
C487 -O2uF, Mvlar
C488 47uF/16VOCW, Electrolvtic
C489
c490
C49] -O01uF, Feedthru
c492 -OOluF, Mvlar .
C493 47uF/16VDCW, Electrolvtic
C494 -O2uF, Mvlar
C495 56nF, Mica
C496 33pF, Mica
C501 -47uF/25V, Electrolytic
C502 .O2uF, Mvlar
C503 -OOluF, Feedthru
C504 -OO0luF, Feedthru
c505 47uF/16V, Electrolytic
C506 .O2uF, Mylar
C507 -OOluF, Mvlar
C508 33pF, Mica
C509 5pF, ‘tica
C510
C511 .47uF/25V, Electrolytic
C512 .O2uF, Mvlar
C513 0.001uF, Mvlar
C514 0.001uF, Mvlar
C515 -O2uF, Mvlar
C516 47uF/16V, Electrolytic
eo lT -25nF/250V, Ceramic
C518 SOMDF , Mica
C519 INpF, Mica
c520 OO1UF, Feedthru
C521
C522 1NpF, Mica
C523 7oF, Mica
C524 1OnF, Mica
C525 7nF, Mica
C526 7oF, Mica
C527 1OpF, Mica
cs28
C529 l0pF, Mica
C530
C531 470F, Mica
C532 -OOluF, Feedthru
C601 through C610
C611 -OOlUF, Mvlar
C612 JuF/16V, Electrolvtic
C613 33uF/6.3V, Electrolvtic
C614 luF/16V, Electrolvtic
C615 through C620
C621 22uF/6.3V, Electrolvtic
C622 100uF/16V., Electrolytic
C623 1OuF/16V, Electrolvtic
C624 INuF/16V, Electrolvtic
C625 -O15uF, Mvlar
C626 -N022uF, Mvlar
C627 2200F , Mica
8-4
Part Number
169256-48
Not used
Not used
Not used
235-7053P12
235-7053P3
Not used
235-7396P]
169256-48
235-7396P]
169256-48
235-7]0000
Not used
Not used
587968-9]
235-7396? 1
235-7199
169256-48
235-7053P65
235-7053P4)
235-7395P74
169256-48
587968-91
537968-91
235-7199P6
169256-48
235-73°6P)
235-7953P41
235-7953P1
Not used
235-7395P74
256-48
-7396P]
ba Db
fem
remeaman)
WWAW
35-7] OF PA2
63-78
-7355P49
kP.9]
is)
2
pies
©
a
om
a
wid
oi
al
SO ON er ON TON Non et SO So
, Liay
MMMM ENN UM Nm = Fh Mr a
=e}
C9 OO CO LO
‘
wea
ADOM NMA nin”
is)
=
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—~u
fea)
OVO 22M St mM
mwo wo
'
2) i i ie i ie
Own wu
irs)
-73952.46
235
235-735
235-7395P55
235
35-7395P25
235-7199012
235-7199P4
235-71 99P4
235-7352P161
235-7352P121
235-7355P215
RAY-48A PARTS LIST
Circuit
Symbol Description
Capacitor, Fixed
C628 -0022uF, Mylar
C629 .O15uF, Mylar
C630 -47uF/25V, Electrolytic
C701 through C710
C711 -OOluF, Mylar
C712 thorugh C720
C721 -OOluF, Mylar
C722 -O2uF, Mylar
C723 47uF/16V, Electrolytic
c901 500pF, Ceramic
c902 0.02uF, Mylar
C303 .OOluF, Mylar
304 2200uF/16V, Electrolytic
C905 -OOluF, Mylar
C906 -O0luF, Mylar
C907 .OOluF, Mylar
c€908 .OOluF, Mvlar
Filter
FL-1
Connector
oh Antenna MR-1
J2 Earphone Jack, SJ-296
Coil
L101 through L110
Bi 150M Rec
L1i2 Rec
(De Rec
L114 through L120
£121 150M Pec
L122 16.9M Pec
L123 through L140
L14] 16.9M Rec
L142 through L150
L151 455K Rec
L152 through L170
L171 455K Rec
L172 455K Rec
L201
L202
L203
t204
L205
L206
L207
L208
L209
L210
L211
L212
Part Number
235-7352P121
235-7352P161
235-7395P74
Not used
235-7396P1
Not used
235-7396P1
169256-48
235-7199P9
587968-78
169256-48
235-7396P1
169256-46
235-7396P1
235-7396P1
235-7396P1
235-7396P1
587968-92
169256-51
169256-55
Not used
587968-34
587968-35
587968-37
Not used
587966-36
587968-4)
Not used
587968-42
Not used
587968-43
Not used
587968-44
587968-45
169256-34
169256-34
169256-34
169256-34
169256-34
169256-34
169256-34
169256-34
169256-34
169256-34
169256-34
169256-34
8-5
Circu
Symbo
L213
L214
L215
L216
L221
E22
L231
L232
L233
L301
L311
L401
L411
L412
L413
L431
L432
L44]
L442
L443
L451
L452
L453
L461
L462
L463
L472
L473
L474
L482
L483
Lae4
L485
L486
L49]
L501
L502
L503
L504
L505
L511
L512
L513
L514
L515
L516
L517
it
1 Description
48M Rec
through L220
140M Rec
through L230
140M Rec
140M Rec
140M Rec
through L310
10 MH
through L410
47uH
TR 6.5M
through L430
TR 6.5M
through L440
TR 19.5M
TR 19.5M
through L450
TR 39M
TR 39M
tnrough L460
TR 78M
TR 78M
through L471
10uH
through L481
through L490
through L510
Part Number
169256-34
169256-34
587968-38
Not used
587968-39
Not used
587968-40
587968-39
587968-39
Not used
169256-38
Not used
587968-65
587968-46
Not used
587968-47
Not used
587968-48
587°968-49
Not used
587968-50
587968-51
Not used
587968-52
587968-53
Not used
169256-26
587968-62
Not used
169256-31
169256 -26
Not used
169256-31
Not used
169256-24
169256-106
169256-24
169256-27
169256-32
Not used
169256-106
169256-35
169256-25
Not used
169256-28
169256-29
169256-30
Jen, =n pete
& } i Gy
[hiacae) sperneilicheeiienss ee Meal
7 ‘ Pinas y
ne
ae en ee Oe on
nena
ha etre fm
j
rf
ij
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i
Circuit
Symbol Description
Coil
L601 through L620
L621
L901
L902 Heat
Crystals
Y101 through Y160
Y161 16.445
¥201 46. 4666MHZ ,RO6
Y202 46 .6333MHZ,R16
¥203 46.7333MHZ,R22A
Y204 48.3333MHZ R26
Y205 48 . 3666MHZ R28
Y206 46. 5083MHZ R68
Y207 through ¥212
Y213 48. SSOOMHZ,,WxT
Diode
0101 through D140
0141 181588
0142 through D170
0171 1N60
0172 1N60
0201 181588
0202 181588
0203 1$1588
0204 through D240
024) Zenner WZ081
0301 through 0330
0331 1N60
0332 1N60
0401 through 0410
041] 1$353/152689
D412 Zenner WZ081
0601 through 0620
0621 181588
0622 181588
D623 181588
0701 through 0720 ;
0721 1$1588
0723 Zenner 0229.1,
0901 v068
0902 u05B
Resistors, Fixed Como. Ohms
Ses Fixed Comp. Ohms
R101 through R110
RAY-48A PARTS LIST
Part Number
Not used
169256-23
169256-33
169256-32
Not used
587968-93
169256-10
169256-11
169256-12
169256-13
169256-14
169256-15
Not used
169256-22
Not used
169327-14
Not used
169327-12
169327-12
169327-14
169327-14
169327-14
Not used
587968-18
Not used
169327-12
169327-12
Not used
169256-8
587968-18
Not used
169327-14
169327-14
169327-14
Not used
169327-14
587967-14
587967-11
587967-15
Not used
8-6
Circuit
Svmbol]
R111 56K
R112 56K
R113 82K
R114 270
R115 100
R116 10
R117
R118 10
R119
R120
R121 100K
R122 150K
R123 270
R124 12K
R125 100
R126 180K
R127
R128
R129
R130
R131 680
R132 33K
R133 IK
2134 4.7K
R135 3.3K
2136
R137 220
2138 through P150
2151 33K
R152 5.6K
R153 1K
R154 10
R155 100
R156 220
R157
2158
2159
2160
2161 1K
2162 33K
2163 5.6K
2164 “YK
2165 220
2166 330
2167
2168
3749
2170
217] 220
2172
2173 47k
2174 47%
2175 56K
5176 5.6K
P77. 220
2178
2179
218
2181
2138
2183
2184
P18
R186
R167
2188
P1869
2199
219] 22K
2192 39K
Description
Part Number
280-1171P136
280-1171P136
280-1171P142
280-1171P52
280-1171P37
280-1171P1
Not used
280-1171P1
Not used
Not used
280-1171P145
280-1171P151
280-1171P52
280-1171P112
280-1171P37
280-1171P155
Not used
Not used
Not used
Not used
280-1171P67
280-1171P127
280-1171P73
280-1171 P07
280-1171P9]
Not used
28N-1171P4a
Not used
280-1171P127
280-1171P100
€80-1171P73
280-1171P]
280-1171P37
280-1171P49
Not used
Not used
Not used
Not used
280-1171P73
280-1171P127
280-1171P100
280-1171P73
280-1171P49
280-1171P55
Not used
Not used
Not used
Not used
280-117104a
Not used
28N-11712} 33
289-1171P133
280-1171P136
280-1171 91Nn
280-117140
Not used
Not used
Not used
280-1171P109
280-1171P100
280-1171P127
280-1171P73
280-1171P73
280-1171P97
280-1171P49
280-1171P85
280-1171P73
Not used
280-1171P121
280-1171P130
Circuit
Symbol Description
Resistors, Fixed Comp. Ohms
R193 12K
R194 220
R195 560
R201 47K
R202 47K
R203 47K
R204 47K
R205 47K
R206 47K
R207 47K
R208 47K
R209 47K
R210 47K
R211 47K
R212 47K
R213 47K
R214 47K
R215 33K
R216 10K
R217 270
R218
R219 100
R220
221 3.9K
R222 18K
R223 1K
R224 3.3K
R225 330
R226 47
R227
R228
R229
RZ30
R231 4.7K
R232 18K
R233 470
R234 5.6K
R235 330
R236 47
R237
R238
R239
R250
R24) 1K
R262 820
253 1K
P2ss 1.8K
2255 1.8K
R256 47K
R287 47K
R248 3.9K
2249 470
R301 through 2310
R31 33K
R312 6.8K :
R313 470
2314 47
R321 39K
R322 6.8K
R323 470
R324 2.2K
R325 through R331
R332 10K
RAY-48A PARTS LIST
Part Number
280-1171P112
280-1171P49
289-1171°64
585108-133
585108-133
585108-133
585108-133
585108-133
585108-133
585108-133
585108-133
585108-133
585108-133
§85108-133
585108-133
585108-133
585108-133
280-1171P127
280-1171P10
280-1171P52
Not used
280-1171P37
Not used
280-117
fee}
WO Ws
Not used
Not used
Not used
Not used
280-1171°97
280-1171P118
280-1171PF}
280-1171P100
280-1171P2
Not used
Not used
Not used
Not used
280-1171°73
280-1171P79
280-1171P73
280-1171P82
280-1171P82
280-1171P133
280-1171P133
280-1171p94
280-1171P6)
Not used
280-1171P127
280-1171P102
280-1171P6]
280-1171925
ot used
280-1171P130
280-1171P193
280-1171P61
280-1171Pe85
Not used
280-1171P109
Circuit
Svmhol Nescrintion
R333 10K
R334 through °340
234] 2.2K
P401 through R410
R41] 56K
R412 18K
R413 470
R414 330
R415 5.6K
R416 22K
R417 56K
R418 100K
R419 56K
R420 330
R421
R422 22
R423 through R430
R43] 4.7K
R432 22K
R433 10K
R434 470
R435 33n
R436 through °440
44)
2442
R443
O4ag
R445
R446
R447
R448
R449
R450
R451
R452
R453
R454
R455
R456
R457
R458
R459
R460
R461
R462
2463
R464
RAB5
met
2
s
re)
MMOS
MMW
~
=
“9K
~I
On
M wold &
Mo.
~~
SO Bw
~
R466 throuah 947]
2472 3.9K
R473 47K
2474 47
R475 throuah R480
R481
R482 1K
R483 through R490
R491 2
R492 3
R493 3
R501 332
R502 270
R503 330
Part “umber
289-1171 1N9
Not used
289-1171985
Not used
280-11719138
280-1171P118
280-1171P61
280-1171P55
280-1171P100
280-1171P121
280-1171P136
280-1171P145
280-1171P136
280-1171P55
Not used
280-1171P13
Not used
280-1171P97
280-1171P121
28N-117191N9
28N-1171P61
289-1171°55
Not used
280-117) 004
280-11719133
289-1171 PA]
28N-1171955
28N-1171913
280-1171P13
Not used
Not used
Not used
Not used
280-1171P133
-1171P25
-1171P100
)-1171P55
0-1171P13
ot used
ot used
‘lot used
Not used
280-1171P133
280-1171094
28N-1171°25
289-11719100
28N-1171937
~~
3°]
oO
=
© © co
22O090
oO
MMM rwr
0
a
‘ot used
289-1177 °94
22N-11719133
28N-1171225
Not used
280-1171P73
280-1171P73
Not used
585326-87
280-1171P22
585326-92
280-7212P19
585326-87
585326-96
ee ae ee a Sekt 6 Ai NMA ARS
Sa ef seat
Sena enn na
Circuit
Symbol Description
Resistors, Fixed Comp. Ohms
R504 through R510
R511 560
R512 3.3 Ohms ‘:W
R513 330 Ohms 1W
R601 through R610
R611 1K
R612 33K
R613 1.5K
R614 10K
R615 47
R616 through R620
R621 4.7K
R622 22k
R623 1K
R624 47K
R625 47k
R626 5.6K
R627 4.7K
R628 100
R701 through R710
R71] 100 Ohms 1W
R712 220 Ohms
R713 through R720
R721 270 Ohms
R722 100 Ohms 1W
R723 through R730
R731 39 Ohms ‘W
R732 1k
R733 270
R734 4.7K
R735 470
Resistor, Variable
VR101 through VR190
VRI9) Volume Control -
Wei EVHBOBS25A14
VR301 through VR330
VR331- Squelch Control -
332 KVSF10-SDMB 10KB
YREO] through VR610
R611 KVSF10-5DMB SKB
VR612 through VR620
VR621 EVHBOAS-25814 10KB
VR622 EVHBOAS-25814 10KB
VR701 through VR710
VR711 EVT-TOAAQOB13 1K
Thermistor
ana an dS
TH701 through TH730
RAY-48A PARTS LIST
Part Number
Not used
280-1171P64
280-7217P64
585326-92
Not used
280-1171P73
280-1171P127
280-1171P79
280-1171P109
280-1171P25
Not used
280-1171P97
280-1171P121
280-1171P73
280-1171P133
280-1171P133
280-1171P19N
280-1171P97
280-1171P37
Not used
169256-44
280-1171P49
Not used
280-1171P52
169256-44
Not used
585326-47
280-1171P73
280-1171P52
280-1171P97
280-1171P61
Not used
169256-39
Not used
169256-43
Not used
169256-42
Not used
169256-40
169256-40
Not used
169256-41
Not used
Circuit
Symbol Description
TH731 PTH60u
Switches
S$] Rotarv
S2 Toggle DPST - Center
$3 Toggle SPST
Transistor
Q1 through 910
Qi] MOS - FET 3SK39/3SK49
Ql2 MOS - FET 35K39/3SK49
Q13 2SC381
Q14 2SC381
gis 2SC381
Q16 2SC381
Qi7 TA706]
Q1s 28C372
Q19 AN214
Q20
121 2S8C381
N22 2SC381
023 280381
N24 280372
925 through 030
931 28C372
32 28C372
33 28C372
N34 280372
935 through 140
941 28C381
42
N43 28C381
44 2S8C381
045 2S8C784
046 280784
947 25C387
048 2SC994
Q49 2$C998
Q50 2SC1241A(c)
Q51 28C1379(c)
52 through 60
061 280372
062 28C372
63 through 970
"71 280235
N72 280372
73 2SA495
74 28235
Trimmer
ve201 39pF, Ceramic
vC202 30nF, Ceramic
VC203 300F , Ceramic
vC204 30pF, Ceramic
vc205 30pF, Ceramic
YC206 30pF, Ceramic
VC207 30pF, Ceramic
VC208 30pF, Ceramic
vc209 30pF, Ceramic
vC210 30pF, Ceramic
vC211 30pF, Ceramic
Part Number
169256-9
169256-57
169256-58
169256-59
Not used
587968-12
587968-12
587968-5
587968-5
587968-5
587968-5
587968-16
587968-134
169327-11
Not used
587968-5
587968-5
587968-5
587968-134
Not used
§87968-134
587°RB-134
587968-134
587968-134
Not used
587968-5
Not used
587968-5
587968-5
587968-6
587968-6
587968-7
169256-1
169256-2
169256-3
169256-4
Not used
587968-134
587968-134
Not used
169256-6
587°68-134
169256-5
169256-6
587968-87
587968-87
587968-87
587968-87
587968-87
587968-87
587968-87
587968-87
587968-87
587968-87
587968-87
Circuit
Symbol Description
Trimmer
VC212 30pF, Ceramic
VvC213 30pF, Ceramic
VC214 30pF, Ceramic
VC401 through VC410
vc411 1OpF, Ceramic
vC412 10pF, Ceramic
vC413 10pF, Ceramic
vc414 10pF, Ceramic
VC415 10pF, Ceramic
VC416 10pF, Ceramic
VC417 10pF, Ceramic
Vce418 10pF, Ceramic
VC419 10pF, Ceramic
vc420 10pF, Ceramic
VC421 10pF, Ceramic
vc422 10pF, Ceramic
VC423 through VC470
VC471 1OpF, Ceramic
VC472 through VC482
VC483 30pF, Ceramic
VvC484 through VC430
VC491 30pF, Ceramic
VC492 30pF, Ceramic
vcs0l 10pF, Ceramic
vcs02 1OpF, Ceramic
VC503 through VC511
vc512 40pF, Ceramic
VC513 40pF, Ceramic
Miscellaneous
Relay MX2P-0 12V
Power Connector 4P
Microphone Connector 4P jack FM-144
Microphone 22-383-30
Speaker 6A100 8 Ohms 0.2W
Earphone Plug SD-059
Crystal Holder S-00107-2
Crystal Holder SZ-101P-00
Fuse Holder S-N1101
Fuse 8A
Pilot Lamp RM5-14V80-150YB
Transistor Radiator for TO-39
Printed Circuit Board NETO90 P3-2
Printed Circuit Board NETO90 P4-2
Printed Circuit Board NET103-3
Printed Circuit Board NET103-2
Printed Circuit Board NET103-1
Printed Circuit Board NET103-3A
RAY-48A PARTS LIST
Part Number
587968-87
587968-87
587968-87
Not used
587968-88
587968-88
587968-88
587968-88
587968-88
587968-88
587968-88
587968-88
587968-88
587968-88
587968-88
587968-88
Not used
587968-88
Not used
587968-87
Not used
587968-87
587968-87
587968-88
587968-88
Not used
169256-47
169256-47
587968-21
587968-22
587967-56
$87967-124
587968-27
169256-60
169256-61
169256-62
343-7174P1
226-7176P48
169256-64
169256-65
169256-66
169256-67
169256-68
169256-69
169256-70
169256-71
Microphone, Connector, 4P Plug FM-144 169256-72
Terminal for Printed Circuit Soards
59BS8806
Hermetic Seal Terminal A102
Transistor Spacer SJ-5
Front Panel
Support Plate of Overlay Panel
Microphone Plate
Channel Knob
Control Knob
169256-73
169256-74
169256-75
169256-76
169256-77
169256-78
169256-79
169256-80
Circuit
Svmbol Description
Speaker Net
Chassis
Front Chassis
Rear Chassis
Cover Chassis for PA Stage
Heat sink for 250235
Heat Sink for AN214
Heat Leader
Speaker Bracket
Mic. Connector Bracket
Filter Cover
Crystal Oven
Filter Case
Mic. Hook
Cushion for Crvstal
Heat Sink
Cabinet
Cabinet Side Plate
Mounting Bracket
Clin
Rubber Bush
Pole for Oven Case
Mic. Connector Spacer
Power Cable
Transmit Output PCB
Receiving PCB
Transmitting PCB
Part Number
169256-81
169256-82
169256-83
169256-84
169256-85
169256-86
169256-87
169256-88
169256-89
169256-90
169256-91
169256-92
169256-93
587968-121
587968-120
169256-96
169256-97
169256-98
169256-99
169256-100
169256-101
169256-102
169256-103
169256-107
169256-108
169256-109
169256-110
ay
os
fe tas MTS OC TERA oes oe Ae lead Sealing d
a a
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id ’
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SECTION 9
MARINE MOBILE ANTENNAS
Jol GENERAL
The antennas and mountings described in this section were designed spe-
cifically for marine use, therefore are encased in fiberglass and specially
sealed to prevent vibration and the penetration of salt atmosphere. All
antennas are pretuned during manufacture and require no adjustments
when being installed. The coaxial cables are RG-58/U (273-1022P1),
terminated in PL-259 (276-7177P1) connectors.
The specifications and base mounting types are listed below and shown in
Rigure Gai
MODEL M68A, for pleasure craft.
3dB gain
58" long
20' cable/connector
Vertical/horizontal split ball mount.
MODEL M69, for pleasure craft.
:
}
i
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j
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|
6dB gain
8' long
20' cable/connector
Uses ratchet mount model AM18 for deck, bulkhead, or
extension mounting.
MODEL M70, for pleasure craft and small commercial vessels.
9dB gain
20' long
20' cable/connector
Uses ratchet mount model AM18 for deck, bulkhead, or
extension mounting.
MODEL M71A, for sailboats.
3dB gain
54' long (5/8" fiberglass waveguide)
60! cable/connector
A 2" x 3" stainless steel "L" bracket and mounting hardware
for installation on an aluminum or wooden sailboat mast are
included.
i = = Ee ey e E = A . by eae eeuet al tse
Ws
sa we beowei
.
Es
i
SEZ ANTENNA MOUNT MODEL AM18
This unit is a chrome plated, laydown mount which offers a high resistance
to marine environments and has sufficient strength to support the M69 an-
tenna. As an added feature, this mount has a quick-release handle which
allows the antenna to be mounted ona slanted deck or against a bulkhead.
os ANTENNA MOUNT MODEL AM-1W
This mount provides the strength and holding power necessary to withstand
rough water conditions. The deluxe universal swivel base mount swings is |
a full 90 degrees in all directions away from the cabin for laydown. The AM-1W Swivel Mount
base is chrome plated brass, and the top mount is durable Delrin witha A For use with M70 Antenna | |
rapid lock-up and release. When using this mount with the M70 antenna, i |
the insulator should be removed. i
9.4 ANTENNA MOUNTING/INSTALLATION
Attach mount to craft in a convenient position using 1/4" hardware. If
hardware extends through a panel, use large diameter flat washers under
nuts (on inside). Only stainless steel or chrome plated hardware should
be used.
To prolong the life of the mounting, all hardware should be encapsulated
with a silicone rubber compound.
.
| M69 M70
AM18 Mount . (> >
For use with M69 Antenna a d
M68W
Figure 9-1 Antennas and Mount Illustration
9-2 9-3
iG Boas:
ian Se
.
saad ie
SERVICE RECORD AND RADIO LOG
The concluding pages of this manual provide the logs necessary for proper
operation and maintenance of your radiotelephone.
12 SERVICE RECORD - Enter date, type of maintenance, service
mans' signature, license number, and expiration date.
2s RADIO LOG - Enter date, time called, and call letters of the
station contacted.
Service Record
ADJUSTMENTS MADE, IF ANY
TECHMICIAN’S
LICENSE SIGMATURE
NUMBER DATE & ADORESS
INSPECTION
OR SERVICE DATE
|
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