Document text
MAINTENANCE BOOK
MODEL FM-9E
FREQUENCY METER
DEVIATION METER
SIGNA L GENERATOR
YT |
|
SINGER
INSTRUMENTATION
Sensitive
Research
IN Sa (28 (20 DN MANUAL
MAINTENANCE BOOK
MODEL FM-9E
FREQUENCY METER
DEVIATION METER
SIGNA L GENERATOR
6/69
Sensitive
Research’
THE SINGER COMPANY * METRICS DIVISION
*A Trademark of THE SINGER COMPANY
WARRANT Y
THE SINGER COMPANY, METRICS DIVISION, warrants each new instrument to be free from
defects in material and workmanship, effective after delivery to the original purchaser as follows:
Sensitive Research" Electrical indicating Instruments
Other Electrical and Electronic Measuring Instruments
Repair or replacement (at our option) without charge (F.O.B. factory) will be effected when our
examination satisfactorily indicates that defects are due to workmanship or materials. Electron
tubes, semiconductors, batteries, fuses, lamps, thermoelements, and RatioTran* potentiometers
are excluded from warranty coverage. Warranty returns must first be authorized by the factory.
If the instrument or any portion thereof, has been abused, misused, damaged by accident or
negligence, or if any serial number or seal has been removed or altered, the warranty is void.
This warranty is in lieu of all other obligations or liabilities expressed or implied and The Singer
Company neither assumes, nor authorizes any person to assume for them, any other liability
in connection with sales of instruments manufactured by The Singer Company, Metrics Division.
THE SINGER COMPANY › METRICS DIVISION
915 PEMBROKE STREET, BRIDGEPORT, CONNECTICUT © 3211 S. LA CIENEGA BLVD., LOS ANGELES, CALIFORNIA
ЗА Yrodomorb of THE GINGER COMPANY
REPAIR AND MAINTENANCE
Instruments should be returned only on prior written authorization from the Singer Representa-
tive or the factory"). Warranty repair will be made upon written request. Please provide the fol-
lowing information in order to expedite our processing of your instrument:
1. Model or Type 5. Approximate date instrument was placed in operation
2. Serial Number 6. Approximate number of hours of use
3. Description of trouble(? 7. Has maintenance action been previously requested?
4. Test instruments used 8. Other comments
Upon receipt of this information our Service Department will send you service data or shipping
instructions. Upon receipt of shipping instructions forward the instrument to the factory prepaid.
If requested, an estimate of charges will be made before work begins.
(1) Contact Metrics Division, Bridgeport, Connecticut for Empire’, Panoramic’, and Sensitive Research® instruments.
Contact Metrics Division, Los Angeles, California for Gertsch* instruments.
(2) Include data on symptoms, measurements taken, suspected location of treuble, maintenance action taken, and any other relevent data.
106/200
TABLE OF CONTENTS
Section
I INTRODUCTIONS боль rrt ы ара Fade...
II ЕТЕЛ МАЛИМ МАМ Е о о ТО ие v
ш SHOPIMAINTENA МСН У ровен.
IV MAIN CHASSIS Si ИК Н ен.
V *LOW FREQUENCY OSCILLATOR А1615 ..........
VI *DISCRIMINASTORZAT6030 ое.
УП *SWEEP GENERATOR AND BUFFER А1616 .........
VIII *PHASE DETECTOR AND SWEEP GATE А1614 ......
IX *300 KHZ AMPLIFIER AND LIMITER A1602 .........
X *SPIKE GENERATOR AL000 2 oues nime 2.
XI *EREQUENGYSDIVIDERS:AT612.77 Se Celso S s
XII *CRYSTALOSCIELATOR ALOLL 222222222222. 22.
XIII * POWER SUPE NYA LOO cc ноаен:
XIV *HIGH FREQUENCY OSCILLATOR А1604 ...........
XV КА ПРИЈА T606 56:95 UI да V cabe E
XVI *MEGACYCLE MULTIPLIER А1605 ..............
XVII *400 TO 500 KHZ MIXER AND AMPLIFIER A1613 .....
XVII Аа CAC ELE SELECROR ALGO ЕУ.
XIX 524010) HZ SEE АОБА О УУ 20022 070 72797292
XX ШОН 2 OSCILLATORE EE бов бон ооо с
*Each section includes а schematic, parts location view, parts
list, and circuit description.
LIST OF TABLES
1 General Specificatlonsq 0 222222252 25....4...
LIST OF ILLUSTRATIONS
Figure
Model FM-9
Дев ponts cu EM Pe x eim dee
InterconneciionsDriaeram dc M шз:
Component Location, Front Panel
Component Location, Back Panel
Component Location, Top Chassis ..............
Component Location, Bottom Chassis
Component Location, Tuning Capacitors
Component Location, Tuning Capacitors
Schematic (Low Frequency Oscillator) ............
Component Location (Low Frequency Oscillator) .....
Schematici(Disenmundtopr et) 72212722 ek. ek
Component Location (Discriminator): ............-
Schematic (Sweep Generator and Buffer) ...........
Component Location (Sweep Generator and Buffer)
Schematic (Phase Detector and Sweep Gate) .........
Component Location (Phase Detector and Sweep Gate)
Phase DetectomWavelarms ен 222222222225...
Schematic (300 KHZ Amplifier and Limiter). ........
Component Location (300 KHZ Amplifier and Limiter) ..
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Figure
10-1
10-2
10-3
11-1
11-2
12-1
12-2
13-1
13-2
14-1
14-2
15-1
15-2
16-1
16-2
17-1
17-2
18-1
18-2
18-3
19-1
19-2
20-1
20-2
LIST OF ILLUSTRATIONS (CONT)
Schematic (Spike Generator) ............
Component Location (Spike Generator) .....
Modulation Circuit Waveforms ...........
Schematic (Frequency Dividers) ..........
Component Location (Frequency Dividers) ....
Schematic (Crystal Oscillator) ...........
Component Location (Crystal Oscillator) ....
Sehematic (Power Supply) n nn nn МЕ
Component Location (Power Supply) .......
Schematic (High Frequency Oscillator) .....
Component Location (High Frequency xs
Schematic (Audio) ЕЕРЕЕ
Component Location (Audio) 222222222
Schematic (Megacycle Multiplier) .........
Component Location (Megacycle Multiplier) .........
Schematic (400 to 500 KHZ Mixer and Amplifier)
Component Location (400 to 500 KHZ Mixer and
Amplifier ie) И Я
Schematic (Megacycle selector) ...............
Component Location (Megacycle Selector) .........
Phase Lock Bridge Waveforms ..........
Schematic (100 KHZ Selector) З
Component Location (100 KHZ Selector) ...........
Sehem tC (1193 ОБЕ НО) РТО
Component оса то (1 KHZ Oscillator) mama
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Page
10-1
10-1
10-3
11-1
11-1
12-1
12-1
13-1
13-1
14-1
14-1
15-1
15-1
16-1
16-1
17-1
17-1
18-1
18-1
18-3
19-1
19-1
20-1
20-1
Figure 1-1. Model FM-9
INT
meus
pune
SECTION I
INTRODUCTION
1-1. GENERAL.
1-2. This instruction book supplements the informa-
tion included inthe Model FM-9 Operation Book. Refer
to the Operation Book for a complete description,
operation instructions, and general theory of opera-
tion.
1-3. Generalmaintenance datais included in sections
П, HI, and IV. Sections II and Ш provide checkout
and calibration procedures. Section IV includes in-
formation to identify and locate circuit boards and
components mounted directly on the chassis.
1-4. Sections Vthrough XX provide maintenance data
for the individual circuit boards. Each section includes
aschematic, component location view, parts list, and
a detail theory of operation.
TABLE I. GENERAL SPECIFICATIONS
FREQUENCY
RANGE
Fundamental 150 - 162 MHZ
Harmonic (3rd) 450 - 486 MHZ
(2nd through 6th also usable)
+ 0.0001% (+ 1 ppm)
(After 30 minutes warmup)
ACCURACY
DEVIATION MEASUREMENTS
0 to 15 KHZ
0 to 5 KHZ
SENSITIVITY, FREQUENCY, AND
DEVIATION MEASUREMENTS
ВЕ OUTPUT
RANGE
Fundamental
ACCURACY (Calibrated into
50 ohms load)
ZERO BEAT INDICATORS
Built-in audio amplifier
and speaker
Visual
INTERNAL FREQUENCY MODULATION
Deviation 0-5 KHZ at 1 KHZ
EXTERNAL FREQUENCY MODULATION
FUNDAMENTAL
300 to 3,000 HZ 5 KHZ deviation
2 KHZ minimum
HARMONIC (3rd)
300 to 3,000 HZ 15 KHZ deviation
6 KHZ minimum
Required Audio Input 1 vrms (approximate)
AUXILIARY OUTPUTS
IF ALIGNMENT SIGNAL
Frequency 400 - 500 KHZ, with
high harmonic content
3 v peak to peak
400 ohms
Amplitude
Source Impedance
CRYSTAL CALIBRATION
SIGNAL
POWER REQUIREMENTS
115/230V, 50 to 400 HZ,
7 va
11.5 to 15 v, approximate
0.3 amp average current,
NEGATIVE ground
OPERATING TEMPERATURE
82° (0:1202Е (0: ю 50 ©)
FURNISHED ACCESSORY
EQUIPMENT Built-in battery charger
and voltmeter.
Six foot coax cable, 50 ohms.
BNC to UHF connectors.
DC power cable, cigarette
lighter connector.
RFA-40 attenuator.
1-1
TABLE 2.
TRANSMITTER FREQUENCY CHECK
10.
Mite
Do not key transmitter when directly coupled
tothe FM-9. Excessive input signal will dam-
age the instrument.
With the unit plugged into a suitable power source,
allow а 30 minute warm-up to stabilize the crystal
oven. |
Extend internal telescoping antenna.
Set ANTENNA switch to IN position.
Turn FUNCTION switch to CAL position.
Set MHZ, 100 KHZ and 0-100 KHZ dials to chan-
nel frequency.
NOTE: Fundamental channels are direct reading.
Harmonic channel frequencies must be
divided by 3.
Set 0-100 KHZ dial to nearest 5 KHZ CAL point
(yellow calibration marks).
NOTE: Fundamental channels are on calibration
marks.
Adjust CAL knob for zero beat, using speaker
and beat meter.
Turn FUNCTION switch to MEAS. GEN. position.
Reset 0- 100 KHZ dial to harmonic channel divided
by 3. Ignore this step for fundamental band.
Key the transmitter. The tone heard inthe speaker
is the difference between the transmitter frequency
and the channel frequency. The antenna length
may be adjusted for optimum coupling.
The transmitter may now be set by adjusting its
frequency for a zero beat against the FM-9 setting,
or its frequency determined by adjusting ће FM-9
0-100 KHZ control for zero beat. The FM-9 dial
has three 200 cycle markers on each side of the
channel for this purpose.
TRANSMITTER DEVIATION CHECK
15
1-2
After the transmitter frequency has been set,
change the FM-9 dial readings (either up or down)
by 300 KHZ.
NOTE: Achange of only 100 KHZ is required for
fundamental channels since the 3rd har-
monic is being used.
Turn FUNCTION switch to LIM. CUR. position.
4.
BRIEF OPERATING INSTRUCTIONS
Key transmitter for limiter current reading.
Meter reading must be above red line. If not, in-
crease coupling and recheck frequency.
Turn FUNCTION switchto 5 KHZ or 15 KHZ posi-
tion. Noise will cause a residual deviation read-
ing when the transmitter is not keyed.
Key the transmitter and modulate by speaking into
the microphone. The peak deviation is read direc-
ly on the motor.
NOTE: The deviation oneither side of the channel
frequency may be read by using the
DEVIATION + - switch. The demodulated
audio is present in the speaker or phone
output.
RECEIVER CHECKOUT
16
10.
117
Connect ЕМ-9 CALIBRATE OUTPUT jack to re-
ceiver antenna connector.
Do not key transmitter while directly connected
to the FM-9.
Set ANTENNA switch to OUT position.
Turn FM-9 FUNCTION switch to CAL position.
Set MHZ,100 KHZ, and 0-100 KHZ dials to channel
frequency.
NOTE: Fundamental channels are direct reading.
Harmonic channel frequencies must be
divided by 3.
Set 0-100 KHZ dial to nearest 5 KHZ CAL point
(yellow calibration marks).
Adjust CAL knob for zero beat, using speaker
and beat meter.
Turn FUNCTION switchto MEAS. GEN. position.
Reset 0-100 KHZ dialto harmonic channel divided
by 3. Ignore this step for fundamental band.
Adjust RF OUTPUT controls to desired output
level.
Discriminator center of receiver may now be set
and sensitivity checked. The FM-9 output may be
adjusted to as low as 0.5 uv.
The output of the FM-9 may be frequency modu-
lated with the internal 1 KHZ oscillator by apply-
ingaOto1vrmstone to the EXT. MOD connector.
SECTION II
FIELD MAINTENANCE
2-1. GENERAL.
2-2. With limited field facilities, maintenance should
be limited to (1) 1 MHZ calibration, (2) calibration of
the 0-100 KHZ dial, and (3) adjustment of the battery
charge circuit. Refer to Section III for additional
maintenance and checkout procedures.
2-3. To remove the covers from the unit, proceed as
follows:
a. Unscrew the two knobs which secure the carrying
handle. Remove the handle.
b. Remove the two circular plates located under the
handle knobs. Each plate is attached with two
Screws.
c. Remove the six screws which attach the covers
to the back panels.
d. Separate the top and bottom covers from the unit.
e. Refer to Section IV for location of the various
component boards.
2-4. 1 MHZ CALIBRATION.
2-5. To ensure accuracy, check calibration of the
1 MHZ crystal every 30 days. To checkand adjust the
crystal, either aprimary standard ora standard frequency
receiver is required. For the high frequency broad-
casts, a receiver such as Gertsch Model RHF-1 is
required. For the very low frequency broadcasts, a
phase comparison receiver such as Gertsch Model
RLF-1is required. To check and adjust the receiver,
proceed as follows:
a. Connect Model FM-9 to a power source and allow
at least 30 minute crystal warmup. Make certain
the OVEN light is cycling on and off.
b. Connect 1 MHZ OUTPUT jack J1606 to the com-
parison (Fx) input of the standard or receiver.
c. Turn FM-9 power switch ON. The remaining
controls of the FM-9 do not affect the 1 MHZ out-
put signal.
d. Proceed with the frequency check.
e. Make certain that the crystal is accurate to one
part in 10-7 or better. Adjust MHZ ADJ capaci-
tor C1648 as required to obtain accuracy within
limits.
2-6. LFO DIAL CALIBRATION.
2-7. During normal operation, the 0-100 KHZ dial is
calibrated from the front panel with the 0-100 KHZ
CALIBRATE control. If zero beats cannot be obtained
at the lowor high ends, the dial should be recalibrated,
A frequency counter or some means of measuring fre-
quencies in the 400 to 500 KHZ range is required.
Reset the low and high ends as follows:
a. Remove covers. See paragraph 2-3.
b. Turn power on and allow a 30 minute warmup.
c. Connect frequency measuring device to the LFO
OUTPUT jack J1605.
d. Set the CALIBRATE control to the approximate
mid point.
e. Set the 0-100 KHZ dial to 000 (cew).
f. Adjust coil L101 (see section 5) to set the LFO to
400 KHZ.
g. Set 0-100 KHZ dial to 000 (cw).
h. Adjust capacitor C1645 to set LFO to 500 KHZ.
The dual screwdriver controls for the capacitor
are accessible from the side of the unit.
1. Turn FUNCTION switch to CAL.
j. Check that zero beat may be obtained with the
CALIBRATE control.
k. Repeat step j with LFO dials set to 500 and 050.
2-8. BATTERY CHARGE CIRCUIT ADJUSTMENTS.
2-9. To adjust the battery charge voltage and meter
calibration, proceed as follows:
a. Connect power cord to a vac outlet.
b. Slide 115/230 volt switch to position matching the
voltage of the power source.
c. Slide dc/ac switch to ac.
d. Turn POWER switch ON.
e. Turn BATTERY CHARGE switch to CHARGE.
f. Connect dc voltmeter to DC INPUT jack J1608.
g. Adjust potentiometer R913 (see section 13) to set
battery charge voltage to the maximum charge level.
h. Adjust potentiometer R914 to set FM-9 meter to the
same reading as the external voltmeter.
2-1/2-2
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SECTION III
SHOP MAINTENANCE
3-1. GENERAL.
3-2. This section includes maintenance procedures
recommendedfor calibration laboratories or similarly
equipped facilities. The maintenance procedures con-
sist of checkout and adjustment procedures and trouble-
shooting notes. Refer to paragraph 2-3 for cover re-
moval.
3-3. ADJUSTMENTS.
3-4. FIELD CALIBRATION. Perform adjustment
procedures outlined in Section II before proceeding
with the adjustment listed below.
3-5. POWER SUPPLY. To check the 9 volt output of
the supply, a dc voltmeter is required. Proceed as
follows:
a. Connect unit to an ac power source and turn
power switch on.
b. Turn BATTERY CHARGE switch to OPERATE.
c. Measure output voltage of supply (across capa-
citor C907).
d. Adjust potentiometer R909 (see section 13) to set
voltage to 9 vdc.
e. Ifadjustment was required, repeat procedure of
paragraph 2-9.
3-6. DIVIDERS. To check the dividers, a frequency
counter is required. Proceed as follows:
a. Turn FUNCTION switch to CAL.
b. Connect counter to TP11 (see figure 3-1).
c. Center coil L701 in the range over whichthe
divider output is 100 KHZ.
d. Connect counter to TP10.
e. Center coil L702 in the range over which the
divider is 5 KHZ.
3-7. 17 TO 28 MHZ OSCILLATOR. Totune the oscil-
lator, a means for measuring signals in the 17 to 28
MHZ range 15 required. Exactfrequency measurement
isnotrequired. The measuring device need only dis-
tinguish between 1 MHZ steps. To tune the oscillator,
proceed as follows:
a. Connect de voltmeter to TP12.
b. Connect frequency measuring device to TP3.
Make certain input impedance of device is 100 k
or more.
c. Set the MHZ dial to 152 mc.
d. Check that oscillator frequency is 17 MHZ. If
required retune oscillator with trimmer capa-
citor C1601.
e. Check that a steady dc voltage (indicating lock)
15 measured at TP12 with the frequency measur-
ing device connected and disconnected.
f. Repeat procedure for the following dial settings:
KHZ OSCILLATOR TRIMMER
DIAL FREQUENCY CAPACITOR
150 17 MHZ C1601
151 18 MHZ C1602
152 19 MHZ C1603
153 20 MHZ C1604
154 21 MHZ C1605
155 22 MHZ C 1606
156 23 MHZ C1607
157 24 MHZ C1608
158 25 MHZ C1609
159 26 MHZ C1610
160 27 MHZ C1611
161 28 MHZ C1612
3-8. 2.6 TO 3.5 MHZ OSCILLATOR. To tune the
oscillator, a means for measuring signals in the 2.6
to 3.5 MHZ range is required. Exact frequency
measurement is not required. The measuring device
need only distinguish between 100 KHZ steps. То tune
the oscillator proceed as follows:
a. Connect de voltmeter to TP6.
b. Connect frequency measuring device to TP5.
c. Set the 100 KHZ dial to 9.
d. Check that oscillator frequency is 3.5 MHZ. If
required, retune oscillator with trimmer capa-
citor C1644.
e. Check that a steady dc voltage (indicating lock) is
measured at TP6 with the frequency measuring
device connected and disconnected.
f. Repeat procedure for the following dial settings:
100 KHZ OSCILLATOR TRIMMER
DIAL FREQUENCY CAPACITOR
C1644
C 1643
C1642
C1641
C 1640
C 1639
C1638
C1637
C1636
C1635
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3-9. 20 TO 32 MHZ AMPLIFIER. Totunethe ampli-
fier, ameans for measuring relative signal amplitudes
in the 20 to 32 MHZ range is required. 'To tune the
amplifier proceed as follows:
a. Set 0-100 KHZ dials to 000 and 100 KHZ dial to
205
b. Connect amplitude measuring device to ТР2.
c. Set MHZ dial to 152 (152.5000 MHZ).
d. Tunefor maximum amplitude and trimmer capa-
citor C1613.
e. Repeat procedure for the following dial settings:
DIAL TRIMMER
SETTINGS CAPACITOR
150.5000 C1613
151.5000 C1614
152.5000 C1615
153.5000 C1616
154.5000 C1617
155.5000 C1618
156.5000 C1619
157.5000 C1620
158.5000 C1621
159.5000 C 1622
160.5000 C1623
161.5000 C1624
3-10. 3 TO4 MHZ AMPLIFIER. To tune the ampli-
fier, a means for measuring relative signal ampli-
tudes in the 3 to 4 MHZ range is required. To tune
the amplifier proceed as follows:
a. Setthe LFO dials to 500.
b. Connect amplitude measuring device to TP4.
c. Set 100 KHZ dial to 9.
d. Tune for maximum amplitude with trimmer сара-
citor C1634.
e. Repeat procedure for the following dial settings:
100 KHZ TRIMMER
DIAL CAPACITOR
C1634
C1633
C1632
C1631
C1630
C1629
C1628
C1627
C1626
C1625
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3-11. DEVIATION METER ZERO SET. To set the
circuit to a center frequency of 300 KHZ, proceed as
follows:
3-2
a. Connect 300 KHZ signal to INPUT/OUTPUT Jack
J1601.
b. Turn FUNCTION switch to 1.5 KHZ.
c. Adjust potentiometer R210 to obtain a zero indi-
cation on the meter.
3-12. DEVIATION METER CALIBRATION. To cali-
brate the meter, a signal with a precisely known FM
deviationis required. To calibrate the meter proceed
as follows:
a. Set the FM-9 to the incoming signal as outlined
in the transmitter deviation check portion of
table 2.
b. Turn FUNCTION switch to 5 KHZ.
Apply a deviation of 5 KHZ to the incoming signal.
d. Adjust potentiometer R226 to obtain a 5 KHZ in-
dication on the meter.
e. Turn DEVIATION switch to alternate position
and check meter indication. If required, adjust
potentiometer R236 for a compromise setting.
f. Turn FUNCTION switch to 15 KHZ.
g. Apply a deviation of 15 KHZ to the incoming
Signal.
h. Adjust potentiometer R224 to obtain a 15 KHZ
indication on the meter.
i. Turn DEVIATION switch to alternate position
and check meter indication. If required, adjust
potentiometer R236 for a compromise setting.
Turn FUNCTION switch to 1.5 KHZ.
Apply a deviation of 1.5 KHZ to the incoming
signal.
1. Adjust potentiometer R238 to obtain a 1.5 KHZ
indication on the meter.
m. Turn DEVIATION switch to alternate position
and check meter indication. If required, adjust
potentiometer R238 for a compromise setting.
3-13. TROUBLESHOOTING.
3-14. The following procedure is intended to assist
in localizing troubles to a stage or series of stages.
The procedure may also be used as a final checkout
procedure for the unit.
3-15, POWER SUPPLY.
a. Check that OVEN light cycles on and off after a
suitable warmup. To check all power input
circuits, check with 115 vac, 230 vac, and 12
vdc inputs.
1. Failure of the light to cycle indicates
troubles in the crystal oven circuit or the
power input circuit.
b. Check 13.5 vdc per paragraph 2-9 апа 9 vdc per
paragraph 3-5.
1. Failure to obtain required output voltages
indicates troubles in the regulator circuit.
3-16. 1 MHZ CIRCUITS.
a. Check 1 MHZ output per paragraph 2-5.
3-20.
1. Erratic or inaccurate output indicates
troubles in the crystal oscillator A1611,
crystal CR1601, or with the crystal oven
Circuit.
2. No output indicates troubles in the crystal
oscillator A1611 or the spike generator
A1608.
Check divider output per paragraph 3-6.
1. Erratic 100 KHZ output indicates troubles in
the buffer Q701 or the 10:1 divider.
2. Erratic 5 KHZ output indicates troubles in
the 20:1 divider.
LFO (INTERPOLATING OSCILLATOR).
Check LFO end points per paragraph 2-7, steps
a through g.
1. Erratic output indicates troubles in the LFO
А1615.
2. No output indicates troubles in the LFO or
buffer Q303.
Check LFO calibrate beat notes per paragraph
2-7, steps i through k.
1. No beat notes indicates troubles with the
audio circuits A1606.
2. Lackof beat note control indicates troubles
in the LFO.
17 TO 28 MHZ OSCILLATOR.
Check tuning of oscillator per paragraph 3-7.
1. No output at TP3 indicates troubles in os-
cillator Q1403.
2. A varying dc output at TP12 indicates loss
of lock. The trouble is probably in shaper
Q1401 and Q1402 or the phase detector.
3. An erratic dc output at TP12 indicates
troubles in sweep generator Q301 and Q302
or in the phase detector.
2.6 TO 3.5 MHZ OSCILLATOR.
Check tuning of oscillator per paragraph 3-8.
1. Nooutput at TP4 indicates troubles is oscil-
lator Q1504.
2. Avaryingdc output at TP6 indicates loss of
lock. The trouble is probably in blocking
oscillator Q1502 or the phase detector.
IF CHECK.
With a frequency measuring device, check that
output at TP1 is between 20 and 32 MHZ.
3-21.
3-22.
1. Anoutput varying in frequency within the 20
to 32 MHZ range indicates loss of lock. Pro-
ceed with the checkout procedure.
2. No output in the range indicates troubles in
the multiplier circuits, HFOQ1004 or mixer
Q1003.
Tune 20to 32 MHZ amplifier per paragraph 3-9.
1. No output indicates troubles in amplifier
Q1404.
Tune 3 to 4 MHZ amplifier per paragraph 3-10.
1. Nooutput indicates troubles in mixer ©1501
or amplifier Q1503.
With a frequency measuring device, check that
output at TP7 is between 400 and 500 KHZ.
1. Nooutput indicates troubles in mixer-ampli-
fier A1613.
Check dc voltage at TP8.
1. A varying dc voltage indicates troubles in
phase detector A1614 or the HFO Q1004.
OUTPUT CHECK.
Check frequency of a transmitter with a known
frequency.
1. No beat notes indicates troubles in buffer
Q1002, the harmonic generator, or beat
detector Q1001.
2. Erratic beat notes indicates troubles in the
HFO.
Measure output at J1601 as the RF OUTPUT
control is varied.
1. No output indicates troubles in the attenua-
tors.
2. Lack of control indicates troubles in the at-
tenuator or buffer Q1002.
DEVIATION METER CHECKS.
Operate equipment per steps 1, 2, and 3 of the
transmitter deviation check section of page
1-2.
1. На limiter current reading above the red
line cannot be obtained, the trouble is proba-
ble in the IF amplifiers Q501 and Q502 or
limiter Q503 and Q504,
Check meter calibration per paragraph 3-12.
1. Inability to calibrate the meter indicates
troubles in the detector drive circuits or in
the meter.
3-3
3-23.
(ALTERNATE METHOD).
DEVIATION METER CALIBRATION CHECK
To check the full scale
readings of the meter, proceed as follows (carrier null
method):
3-4
Operate transmitter ata convenient carrier fre-
quency.
Connect audio oscillator to the external modula-
tion input of the FM generator. Operate audio
oscillator at 577.8 cps and zero amplitude.
Operate the Model FM-9 as a frequency meter
and zerobeat against the carrier frequency (see
Operation Manual).
Adjust Model FM-9 to obtain a low but clearly
audible beat frequency note. A beat note of ap-
proximately 200 to 300 cps should provide ade-
quate results. Use headsetto monitor beat note.
Increase amplitude of audio oscillator until the
beat note against carrier disappears. Amplitude
should be increased slowly and the beat note
should be monitored carefully to make certain
that the correct beat note disappearance is se-
lected.
Continue increasing amplitude until the third dis-
appearance of the beat note against carrier oc-
curs. Carefully adjust amplitude to center the
control in the range of the beat note disappear-
ance. Atthis point, the FM generator is operat-
ing with a deviation of 5 KHZ.
Reset the Model FM-9 to a frequency 300 KHZ
below the carrier frequency of the transmitter.
Turn FUNCTION switchto the FREQ. SET posi-
tion.
Operate the FM generator with no modulation
applied. This may be accomplished by discon-
necting the audio oscillator. Do not change fre-
quency or amplitude settings of audio oscillator.
Adjust Model FM-9 as required to set the devia-
tion meter to the FREQ. SET red line.
Turn FUNCTION switch to the 5 KHZ position.
Turn DEVIATION switch to the + position.
Apply modulation to the FM generator.
The peak deviation meter should indicate 5 KHZ
+ 5%.
Reset the Model FM-9 to a frequency 300 KHZ
above the carrier frequency of the transmitter.
Repeat steps В, i, j, and k.
The peak deviation meter should indicate 5 KHZ
+ 5%.
1. Н the readings of steps п and p differ, this
indicates trouble in the input signal (distor-
tion, unequal sidebands, etc.).
2. H the readings are equal but out of specifi-
cation, the most probable source of trouble
is the discriminator and meter drive.
Turn DEVIATION switch to the - position.
The peak deviation meter should indicate 5 KHZ
+ 5%.
Check that audio signal of approximately 577.8
cps is present.
Repeat procedure for the 15 KHZ range using a
modulation frequency of 1.7333 KHZ.
TP12
ТРЗ
E
a
=
Test Points (Sheet 1 of 2)
Figure 3-1.
3-5
~
218
上 一
ТР 11
ТР10
Test Points (Sheet 2 of 2)
Figure 3-1.
3-6
SECTION IV
MAIN CHASSIS COMPONENTS
(See figures 4-2 through 4-7)
ITEM PART NO. MFR
Board Assy, IF Amplifier and limiter (See Section IX) AA-1127
Board Assy, Discriminator and meter (See Section VI) 1-002552-001
Board Assy, High frequency oscillator (See Section XIV) АА -1129 Singer
A1605 Board Assy, 1 MHZ multiplier (See Section XVI) AA-1130 Singer
A 1606 Board Assy, Audio (See Section KV) ; AA-1131 Singer
А 1607 Board Assy, 1 MHZ selector (See Section XVIII) AA-1132 Singer
A 1608 4-4 | Board Assy, 1 MHZ spike generator (See Section X) AA-1133 Singer
А 1609 4-4 Board Assy, Power supply (See Section XIII) AA-1134
A1610 4-5 Board Assy, 100 KHZ selector (See Section XIX) AA-1135
A1611 4-4 Board Assy, Crystal oscillator (See Section XII) AA-1136
А1612 4-4 Board Assy, Frequency dividers (See Section XI) AA-1137 Singer
А 1613 4-5 Board Assy, 400 to 500 KHZ IF (See Section XVII) AA-1138 Singer
+
A1614 4-4 Board Assy, Phase detector and sweep gate (See АА -1139 Singer
Section VIII)
A1615 | 4-4 Board Assy, Low frequency oscillator (See Section V) AA-1140 Singer
= -十 一 一 一 一 一
A1616 4-4 Board Assy, 3 cycle sweep and LFO buffer (See AA-1141 Singer
Section VII)
| А 1617 4-4 Board Assy, 1 KHZ oscillator (See Section XXI) AA-1312 Singer
AT1601 4-2 Attenuator, variable АА -2437 Singer
AT1602 4-6 Attenuator, fixed, 20db AA-1313-2 Singer
C1601
thru 4-7 Capacitor, trimmer, 3 to 35 pf 403 Elmenco
C1606
C1607
thru 4-6 Capacitor, trimmer 402 Elmenco
©1512
Capacitor, Elmenco
de So
Capacitor, Elmenco
ИГ
Capacitor, dual trimmer, 5 to 25 pf 3153-000-NPO
Capacitor, variable, 17 to 360 pf
Capacitor, trimmer, 1.8 to 8. 7 pf 160-104
REF
DESIG NO ITEM
Capacitor, variable, 0. 6 to 14 pf
Capacitor, mica, 150 pf 2
2
4-6
e
-
Oo
+
со .
3
C1650 4-6
Capacitor, mica, 120 pf
4-6 Capacitor, mica, 82 pf `
4-6
Capacitor, mica, 27 pf
C1658 Capacitor, mica, 10 pf
Capacitor, mica, 82 pf
Capacitor, mica, 68 pf
Capacitor, mica, 47 pf
Capacitor, mica, 43 pf
C1659 Capacitor, mica, 33 pf
C1660 Capacitor, mica, 27 pf
C1661 Capacitor, mica, 27 pf
C1662 Capacitor, mica, 15 pf
C 1665 КЕЕ Part of FL1601
C1666 4-4 Capacitor, electrolytic, 100 uf, 15 v
C 1667 Capacitor, electrolytic, 25 uf, 15 v
4-4
Ai
Capacitor, ceramic disc, . 001 uf
5
CR1601 4-5 Crystal Assembly, 1 MHZ, 12 vdc oven
CR1602 4-4 Diode
CR1603 4-4 Diode, Zener 9 v
2
DS1601 4- Lamp
F1601 4-3 Fuse, 0.25 amp
F1602 4-3 Fuse, l amp
FL1601 4-4 Filter
| 71601 4-2 Connector, BNC
J1602 4-2 Jack, phone
J1603 4-3 Jack, red
J1604 4-3 Jack, black
J1607 4-2 Connector, BNC
J1608 4-3 Connector, phono
PART NO.
VC-11GF
рМ15Е1517
ГМ15Е1217
DM15E820J
DM15E820J
DM15E680J
DM15E470J
DM15E430J
DM15E270J
DMI15E150J
DMI15E100J
DM15E330J
DM15E270J
DM15E270J
DM15E150J
P65AN2610015
P65AG122515
86127541077
TCO-11RD-4
SC-2
1N1511A
344
MDL-1/4
MDL-1
AA-1125
2230-7
12A
108-902
108-903
108-903
108-902
27
1
nj
1
о
UG-911/U
S-PM-1
MFR
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
Elmenco
MEC
MEC
Erie
|
Bliley
Semtech
GE
Bussmann
Bussmann
Singer
Dage
Switchcraft
Е, Е. Johnsons)
Е. Е. Johnson
E. F.Johnson
Е. Е. Johnson
Singer
МАЯ ATTENUATOR|
ATI6O!
一 一 CALIBRATE
OUTPUT
ею
DISCRIMINATOR OUTPUT
41603
)
DEVIATION
= 602 -
DISCRIMINATOR
Е 0201,9202
Е AMPLIFIER IF AMPLIFIER NUR Ë
440 KHz 46Окн: 0505,
0502 19
050 504
IF AMPLIFIERS AND LIMITER | DISCRIMINATOR AND
5 S 5 - METER DRIVE
I
LOWER
SIDE BAND
DETECTOR
十 9yB
1
8 eae 本
= 2 525355 тен
FUNCTION کے
FFER TIMES 13
HARMONIC HIGH FREQUE! MIXER TIMES 2 BUFFER МЕНЕНЕ um E log
TI < MULTIPLIER AMPLIFIER MULTI ' А LIFIER MULTIPLI
GENERATOR | nurrens. OSCILLATOR 20-30мн: МН 68 MHz 65NHz 13мн: Тамна
A 9100 areas 91005 91204 01203 01202
|
oo | теа
PRE AMPLIFIER
оно, 01102
TWIN TEE
NOTCH FILTER
AUDIO
AMPLIFIER
91103
О CALIBRATION
BEAT DETECTOR
СА 103
LFO
AUDIO DRIVER
9104 , 01103
AUDIO
BHORES
41602
NOTES:
1. Ж PROGRESSIVELY SHORTING CONTACTS.
2. UNLESS OTHERWISE SPECIFIED RESISTOR
VALUES ARE IN OHMS +10% 1/4 WATT.
3. UNLESS OTHERWISE SPECIFIED CAPACITOR
VALUES LESS THAN ONE ARE IN MICRO-
, FARADS, THOSE MORE THAM ONE ARE IN
PICOFARADS.
умна
TP 2 SELECTOR
!
САР VALUE 1,5-20,( 12 PLACES (С1613- 1624)
сєз сем cie с66
2176 св? сев Acisi “| сл6807/|с1621 Ж стег
1 се 1 с,662
|| 5 T
2 3 4 5 8 9 10
САР. VALUE 3-35 1606)
2 [4]
37101624
4
01201
3b Ба
= GENERATOR
OPERATE
BUFFER
9605
[BATTERY CHARGE
И ПЕ
5
Cl601 __ стог с 6 (Сі607 (608 С1609 С16|0
47 аз М 15 10
04654 | cie55 | с1656 | cies7 Í cie58
* в °
isoL_4izol_4 2 e2
CI649] С9650 | cies! | с1652 ci
о 2 3 4 6 7
^ RES.VALUE 270 11 PLACES (81604 -RIGI4)
o 4
1 5 7 8 10
YA 1604 PRIGOS QRI606 981607 9RIEOB $91609. 0 1610 081611 9RIEI2 ?RI613 ORIGIA ©
Т 3 O
ó! 62 63 05 o6
ут CE САР VALUE 1-5 TO 20 Рі 10 PLACES (5123-6639) _ _________
Ci&25 01628 (06527 (С1828 „C1629 „СЗО „сёз! „C1632 (01655
Е Ї Ї Ї H
' 2 | 4 5 Š 295 1 9
ےت ددع | | مو T uL
AMPLIFIER
91503
'
0 SS AM cd MM M
i
PHASE
pete DETECTOR
TP 6 O
100 KHz
51
ума D
c 801,0802
SELECTOR CRYSTAL |OSCILLATOR
o J1606
[M
BLOCKING
UTPUT
OSCILLATOR 5
Q 604 Pa
! cJ
SHAPER re
FREQ
9602, q eos — CONV
400-500 KHz
AMPLIFIER
Q1302
LOCKED NORMAL
LFO e
! +9V0
3 HERTZ
SWEEP AND
LFO BUFFER
400 - 500
KMz IF
C 647
15 то5
CRYSTAL
{ LFO OUTPUT
BUFFER IF DETECTOR | | o
D Ga жол шэн
17 TO 560 Ж a E
Ci645 Ф
то
d -4-02881-4- acca EP Gene |
SWEEP GENERATOR a
93,0502 | || d
T
о:
1
PHASE
ETECTOR
ТРЕ о D ===
0401,0405
ТР 9 о
LFO BUFFER
Q 303
[PHASE DETECTOR 8 SWEEP GATE)
к ово 522
2N669
У 1605
І
41609 |o
|
! orev
AMPLIFIER 1 E
d ви
[81
мн: ADJUST o —0*9VA
5 o2
3
с1648 A O EXT MODULATION
CRYSTAL 5 41607
OSCILLATOR тоның !
зүв
ا
91602 x
pee Са} zh1465 =
MES. зтакову
BUFFER
o
1 !
А о
2160? | |
ТА
1
|
DIVIDER AC 706
BTH
705 1
| — -(sii6os |
157 230
25MFD |
C1867
RIGIG — RI6I7
22K 470 4 Қаса
THERMOSTAT |
CRYSTAL ОУЕМ
|
|
Figure 4-1. Interconnection Diagram
|
4-3
—
ВЕЕ FIG.
DESIG NO, ITEM PART NO,
E
J1609 4-3 Connector, receptacle 403BT5
ne | 42 | Gmaector, BNC 2230-7
|2
1,1601 Choke, 3.9 uh (Part of FL1601)
TUE Ser тб
1,1603 Choke, 1.8 uh (Part of FL1601) Z-144 Ohmite
LS1601 Speaker, 100 ohm coil
22A06Z100
2-301836-001
2N669
2N1485
JU1021 Allen-Bradley
Transistor
Transistor
Potentiometer, 47 ohms
R1602 4-5 Resistor, composition, 4. 7K x 10%, 1/4 watt
R1603 4-2 Potentiometer, 1K
R1604
thru 4-5 Resistor, composition, 270 ohms + 10%, 1/4 watt
R1614
R1615 4-4 Resistor, wirewound, 20 ohms + 10%, 5 watts
| R1616 4-4 Resistor, composition, 2.2K + 10%, 1/4 watt
| R1617 4-4 Resistor, composition, 470 ohms + 10%, 1/4 watt
R1618 4-4 Resistor, composition, 330 ohms + 10%, 1/4 watt
R1619 4-5 Resistor, composition, 1, 8K + 10%, 1/4 watt
R1620 4-5 Resistor, composition, 4.7K + 10%, 1/4 watt
R1621 4-6 Resistor, composition, 820 ohms + 10%, 1/4 watt
R1622 Resistor, composition, 4. 7K + 10%, 1/4 watt
R1623 Resistor, composition, 2.2K + 10%, 1/4 watt
R1624 4-2 Resistor, variable
R1625 4-5 Resistor, composition, 10 ohms + 10%, 1/4 watt
$1601 4-2 Switch
4-2 Switch
$1607
51608
51609
51610
51611
»
-4
4-2 Switch, slide, DPDT
Switch, slide, 4PDT
Switch, slide, DPDT
Switch, slide, DPDT
a
4
n
VF-45
SW-251
4-40257-001
SW-253
SW-252
4603-A2 Muter
3615 Muter
9604
4633
4603-A2
4603-A2
4603-А2,
DESIG
FIG
ITEM PART NO. MFR
NO.
$1607 Switch, slide, 4PDT Muter
$1608 i
Switch, slide, DPDT Muter
Switch, slide, DPDT
Switch, slide, DPDT 4633 Muter
4603-A2
4603-A2
Switch, slide, DPDT
Muter
4603-A2 Muter
TP-19 Singer
17238 Belden
XDS1601 EE Lampholder 162-8430-931
БЭЛ irgend 12:20 a
LS1601 R1603 DS1601 M1601
C1646
$1603
POWER {f0 DEVIATION MODULATION 7 5 ] 602
ANTENNA FC
iN OUTPUT , LEVEL EXT MOD.
(00% 2 4
1 4 : í UT
سے ° (б.
J1610 С M ©. -----11607
CALIBRATE EASURE QUT PHONES TAN 400-500
OUTPUT INPUT BY
J1601 51601 51606 Ј1602 51604 51609 1605 51605 R1624
Figure 4-2. Front Panel
1091М
eit
1VWSON
; @
dWY I ИУ v/1
90 ду | |
033001
6091f
8912 9091r 8091Г 20914 10915 80915 10914 £091f
Back Panel
Figure 4-3.
4-6
FL1601 A1608 CRI603 R1615 C1666 T1601 A1609
A1612
A1602 А1614
Figure 4-4, Top Chassis View
R1602
СК1601
К1601
A1607 - C1668 A1610
Figure 4-5,
A 1605
Bottom Chassis View
A1613
C1647
C1645
C1646
A1606
C1618
C1622
C1616
C1662
C1623
C1613
C 1659
C1624
R1621
C1630
Figure 4-6. Tuning Capacitors
C1629
C1632
C1627
C1633
C1625
C1634
C1626
C1631
C1628
2509
C1611
C1612
C1644
Figure 4-7. Tuning Capacitors
C1643
C1636
C1638
C1641
C1639
C1640
O+9V
400-500 KC
OUTPUT TO
BUFFER AMPL.
СІ646 СІ647
2X(5-25)
L МАІМ £ — CALIBRATION
TUNING CONTROL
TO MAIN 17-360 15-5
二 LOCK PHASE
= DETECTOR
TO LOCKED
NORMAL SWITCH
NOTES:
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS + 10 Yo 1/4 WATT.
2, UNLESS OTHERWISE SPECIFIED CAPACITOR. VALUES LESS THAN ONE ARE IN MICROFARADS,
THOSE MORE THAN ONE ARE IN PICOFARADS,
Figure 5-1. Schematic (Low Frequency Oscillator)
RIO3 R101 C104 R109 C101
1101--- iS
Q101
cie R105
R108 C107
C105 R104
C106
C102 C108 К107 9102
Figure 5-2. Component Location (Low Frequency Oscillator)
SECTION V
5-1
C101 Capacitor, mylar, 25 uf, 15 vdc P65AG122515 E
C102 Capacitor, ceramic disc, 0.01 uf 8512501032
EM Capacitor, ceramic disc, 0.01 uf 851 2 5U70595Z
Capacitor, ceramic disc, 0.01 uf 851750310357
Capacitor, ceramic disc, 0.01 uf 8512501037,
a
=
°
о
С106 Capacitor, mica, 390 pf DM15E391J
AUN Capacitor, mylar, 0.022 uf, 200 vdc 192P22392
C108 Capacitor, 100 pf | TCN-100
Transistor 2N3904 NE d d
R101 Resistor, composition, 27K +10%, 1/4 watt
Resistor, composition, 10K £109», 1/4 watt
o
=
o
N
©
P
o
ES
Resistor, composition, 2.2K +10%, 1/4 watt
s
@
С»
„ә
R104 Resistor, composition, 100 ohms 4107, 1/4 watt
ve)
2
©
сл
Resistor, composition, ІК +10%, 1/4 watt
Resistor, composition, 470 ohms +10%, 1/4 watt
Resistor, composition, 15K +10%, 1/4 watt
108 Resistor, composition, 4.7K +10%, 1/4 watt
R109 Resistor, composition, 150 ohms +10%, 1/4 watt
ж ze) 20
о ce
> с
9-1. The low frequency oscillator is а multivibrator c. High and low dial tracking controls capacitor
type of oscillator with a tuned LC network in the base C1645 and coil L101.
of the second stage Q102. Four controls tune the LC
network: 9-2. TYPICAL VOLTAGES.
a. Тһе 400 to 500 KHZ output to the buffer amplifier
a. 0-100 KHZ capacitor C1646 which functions as (measured at C104) should be approximately 1.5
the main tubing control. volts peak-to-peak.
b. The signalto the main lock phase detector (meas-
uredat the junction of C106 and C107) should be
approximately 0.1 volt peak-to-peak.
b. CALIBRATION control capacitor C1647 which
sets the circuit to the 5 KHZ calibration points.
5-2
(5215
| | Я R220 Et . " - = C2 1 6
NOTES: о Р----- 4 z ( —
1. ALL TRANSISTORS ARE TYPE МЕ 217. | do CR205 ge + [n $1
+9V (SW) R221 me
о AQ | R238
一 一 -一 一 一 一 一 一 一 一 一 一 — — SCOPE C206 сол ERE mE
+9V (SW) ХН (О) output
R201 C207. CR202 CR204 C209 R211 R210
220 DISCRIMINATOR TO POINT "А Ч хаа в C205
9203 cere Ае LIMITER NN
INPUT A | R234 44 Ж 2 | ОН CR201 \ "y R203
“ГА 10 AUDIO AMPL 3 209
= 三 BOARD — ` CR203~ R | R
m F = 270 KC F = 330 KC ваа DETECTOR DRIVE |PEAK DETECTOR ‘sox Пе управа C208 4 ” C201
Ji 1 Ji Wet EM R235- = | 1201
i
R203 | с2о: |caoe.lceos.l R2 L202 | R206 = Q202
ок T 270 ,ol T 220T юк | R205 R204
IR 1 | Q201 coos El
= 100 |o = | | R208 » | R212
| dr чю umo |0 ee ca qe үсгэн 1202 oa ИРИНЕ ER rd
1252 7 CHG.SW. | R207 3 ОТ я 1202
K
9201 330 550 | C202 t- 4 R213
CR202 CR204 3 — 7 ІШ! R233
| ын E ( Za соо ÉS „аф R214
mazo L203 R224
K) ТЕ авг” М к225
ERE Е паз — T ЗОМРО/ I5V | R216— < 5 —- R096
| 3) | DEVIATION | C211 - Ж 204 “
өше) de EE| Deep dee | E s
R209 470 |
R208 22K caos | (32112
REI 8211 О AUDIO OUTPUT | R215 f k 3 F E j R227
| 220 | О206-т T T = C214
|
|
|
|
2. ALL DIODES ARE TYPE 1М273. | Ya 5 CR206
3. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS +10% 1/4 WATT. C217
4. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICRO- dum SERM (2 R231 : =>
5. FUNCTION SWITCH; FARADS, THOSE MORE THAN ONE ARE IN РІСО- : E
FARADS. + 7 H CR208 = ^ C218
CR207
C219
R236
Figure 6-1. Schematic (Discriminator) Figure 6-2. Component Location (Discriminator)
SECTION VI
6-1
PART NO.
Capacitor, mica, 270 pf DM15E271J
Capacitor, ceramic disc, 0.01 uf 8512501032
mica, ГМ15Е2417
Capacitor,
Elmenco
Capacitor, mica, 56 pf DM15E560J
Capacitor, mica, DM15E560J
Capacitor, 330 pf DM15E331J
Capacitor, 330 pf DM15E331J Elmenco
[emen pue |
DM15E750J
EC
P65AK125015 MEC
EC
Capacitor, mica, 100 pf DM15E101J
Capacitor, mylar, 0.1 uf C280AA/P100K
Capacitor, plastic, 0.5 uf
Capacitor, electrolytic, 6.8 uf, 15 V
Capacitor, mica, 75 pf
DM15E131J
Capacitor, mica, 130 pf
Capacitor, electrolytic, 10 uf, 15 V P65AG101015
15 У P65AN1610015
Capacitor,
electrolytic,
Capacitor, electrolytic, 50 uf, 15 V
15 v
electrolytic,
Capacitor,
M
WA БЕР;
R201 Resistor, composition, 220 ohms +10%, 1/4 watt =:
R202 Resistor, composition, 12K +10%, 1/4 watt — 5
R203 Resistor, composition, 22K +10%, 1/4 watt
R204 Resistor, composition, 15K +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
R207 Resistor, composition, 470 ohms +10%, 1/4 watt
R208 Resistor, composition, 2.2K +10%, 1/4 watt
R209 Resistor, composition, 2.2K +10%, 1/4 watt
2
6-
ITEM PART NO. MFR
Resistor, variable, 1K MTC-4-1K Mallory
R211 Resistor, composition, 1. 5K +10%, 1/4 watt
R212 Resistor, composition, 470 ohms +10%, 1/4 watt
Resistor, composition, 2.2K +10%, 1/4 watt
R214 Resistor, composition, 22K +10%, 1/4 watt
R215 Resistor, composition, 4.7K +10%, 1/4 watt
R216 Resistor, composition, 10 ohms +10%, 1/4 watt
R217 Resistor, composition, 10 ohms 410%, 1/4 watt
R218 Resistor, composition, 100 ohms 4100, 1/4 watt
R219 Resistor, composition, 22K+10%, 1/4 watt
R220 Resistor, composition, 15K +10%, 1/4 watt
R221 Resistor, composition, 2.7K +10%, 1/4 watt
R222 Resistor, composition, 4.7K 4100, 1/4 watt
R223 Resistor, composition, 12K +10%, 1/4 watt
R224 Resistor, variable, 25K MTC-4-25K
R225 Resistor, variable, 39K +10%, 1/4 watt
Mallory
R226 Resistor, variable, 50K MTC-4-50K
Mallory
R227 Resistor, composition, 1K +10%, 1/4 watt
R228 Resistor, composition, 27 ohms +10%, 1/4 watt
R229 Resistor, composition, 1K +10%, 1/4 watt
R230 Resistor, composition, 12K 10%, 1/4 watt
R231 Resistor, composition, 4.7K £107», 1/4 watt
R232 Resistor, composition, 15K +10%, 1/4 watt
R233 Resistor, composition, 150K +10%, 1/4 watt
R234 Resistor, composition, 10 ohms +10%, 1/4 watt
R235 Resistor, variable, 5K MTC-1-5K
R236 Resistor, variable, 10K MTC-1-10K
Mallory
Mallory
R237 Resistor, composition, 120K +10%, 1/4 watt
R238 Resistor, variable, 50K
MTC-1-50K Mallory
6-1. Thediscriminator receives a signal from ampli-
fier andlimiter A1602 and delivers a dc voltage to the
meter with an amplitude determined by frequency
deviation. The unit also delivers demodulated audio
to the discriminator output (scope) jack and to the head
phone jack.
6-2. The input signal is applied to the two sides of the
discriminator through transistors Q201and Q202. The
low side Q201 is tuned to 270 KHZ and the high side
Q202 is tuned to 330 KHZ. The outputs of the two
transistors are applied to peak-to-peak detectors
(CR201, CR202, CR203, CR204). The rectifier cir-
cuitis referenced to a dc level by potentiometer R210.
6-3. Atthe center frequency of 300 KHZ, the signals
developed by the two sides are equal and therefore the
audio output of the circuit is zero. As the frequency
deviates, one side or the other will develop a greater
signal and therefore an audio output. The amplitude
of audio signal is determined by the amount of devia-
tion from the center frequency. The audio output is
delivered to the audio circuits through emitter follower
Q203. The audio signal is delivered to the discrimi-
nator output jacks J1603 and J1604 through resistor
R233.
6-4. Athree stage audio amplifier consisting of tran-
sistors Q204, Q205, and Q206 is used to drive the
voltmeter circuits. Direct coupling is used between
stages anddegenerative feedback stabilizes gain. The
voltmeter circuit is calibrated by setting the gain
throughthe amplifier. Potentiometer R226 calibrates
the meter for a full scale indication of 5 KHZ, poten-
tiometer R224 calibrates the meter for 15 KHZ, and
potentiometer R238 calibrates the meter for 1.5 KHZ.
6-5. Two peak reading voltmeter circuits are included
for detection of upper and lower side bands. Capaci-
tor C219 is charged positive to a peak value through
diode CR207 and slowly discharges through resistor
R232. Capacitor C218 is charged negative through
diode CR208 and slowly discharges through resistor
R230. Either circuit may be connected to the meter
by deviation switch S1605.
6-3
Mes q
ОАО 5| 0 4 т a
d | u Ма/
“Ёл IM m hon " ^
! ya " | њи
к
4 "об
1
4 Lig !
ЇГ аль уай
m bed |
b few
1222
Ф:
P чин, ий Лы з wor?
0 ult: ММ: бр ову CE
а Ай. м ба? мені СЕТ ДИ. MUS
LEM LX EI DL. һе ig E E
таг? om ONE әү: жы, 12 ove PL
% гоё ка 871! „ диви i КУТ MAA av Mu E К й E D "y 27
"TOM I ҮТ. reise Meum 4 To м
Е |
"UT
u
| D
А I Í i
21 ' :
LI M | p
ТА... НЬ?!
Y iH | T
ҮЙ mv E |
m т ма = a гэ | |
Ero cux
Ч 7 і | | Е
OUTPUT TOLFO
274570 OUTPUT
L.F.O. BUFFER AMPLIFIER
SWEEP GENERATOR
+ ЭМО
TO LFO "CAL"
| BEAT DETECTOR
C306
-Ol ^ EXTERNAL
i v LFO OUTPUT
R313 R314 $ 二
IK IK
5 |
IMFD — | МЕО = |
NOTES:
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS +10% 1/4 WATT,
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICROFARADS,
THOSE MORE THAN ONE ARE IN PICOFARADS.
Figure 7-1. Schematic (Sweep Generator and Buffer)
R313 R314 R307 Q302 C304 C301 R301 Q301
R312 C302
Q303
R311 (303
R310 R302
R303
: » © pooo
R309 C306 R305 R308 R306 R304
Figure 7-2. Component Location (Sweep Generator and Buffer)
SECTION VII
7-1
Capacitor, electrolytic, 1 uf, 15 V
Capacitor, electrolytic, 5 uf, 15 vdc
Capacitor, electrolytic, І uf, 15 уде
Capacitor, electrolytic, 10 uf, 15 vdc
Capacitor, mylar, 0.1 uf
[memes [me
Resistor, composition, 39K 51095, 1/4 watt
Resistor, composition, 5. 6K +10%, 1/4 watt
Resistor, composition, 18K +10%, 1/4 watt
Resisto-, composition, 6.8K +10%, 1/4 watt
Resistor, composition, 10 ohms +10%, 1/4 watt
Resistor, composition, 3.3K +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 2.2K +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 22K «100, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
7-1. The sweep generator and buffer supplies the sweep 7-2. Sweep generator Q301 is a phase shift type of
voltage to assist the phase detectors in locating locks and oscillator which supplies a very low frequency (approx-
a buffer for the auxiliary LFO outputs. imately three cycles) signal. The signal is applied to
the load through emitter follower Q302.
7-2
LFO
INPUT
PHASE DETECTOR (MAIN LOCK)
+A O* 9V
R416
R413
Q406 gaos 22K 100
C408
E | 400-500KC
4- || © iF INPUT
= C412 Вагі
4] 47K - TEST POINT
@ | 8409 21414 TET
500 47K =
AC BALANCE
R420 JE = 1 + ото LOCK LINE
JE C413
R415 =
R410 3 TEST POINT
47K :
CR402 R408
47K
4
CR 403 C409
01 R417 ТР 8
C404 C405 C406
330 T 100 330
CR 401 CR404 сан
SWEEP GATE ЗЭВ
C403
5МЕО/15У
A NOTES:
|. UNLESS OTHERWISE SPECIFIED RESISTOR
R407 VALUES ARE IN OHMS È IO % 1/4 WATT,
2. UNLESS OTHERWISE SPECIFIED CAPACITOR
VALUES LESS THAN ONE ARE IN MICRO-
FARADS, THOSE MORE THAN ONE ARE IN
PICOFARADS.
NOMINAL VALUE SHOWN.
о !
TO TRACKING
BIAS
Figure 8-1. Schematic (Phase Detector and Sweep Gate)
3. * INDICATES FACTORY SELECTED COMPONENT.
TEZ
R406
C401-
(402 $
« j
C410
R419 C411 Q404 R418 |R417
ЕУ А
R413 / R407 / R401/ R402
Q403 C403 К409 R415 Q401
R412 C407 C413 C406
TP9 / Q405
R405 | CR402
CR403
TP8
CR404
R410
C412
Q406
C409
R411
R420
R421
C404
N R408
CR401
C402 C405
Figure 8-2. Component Location (Phase Detector and Sweep Gate)
REF
DESIG
ITEM
PART NO.
C401 Capacitor, 0. 1 uf С280АА/Р100К | Amperex
[em |
C402 Capacitor, ceramic disc, 0. 01 uf
C403 Capacitor, 5 uf, 15 vdc
Capacitor, ceramic disc, 0.01 uf 8512501032
Capacitor, ceramic disc, 0.01 uf 851Z5U103Z
Capacitor, electrolytic, 10 uf, 15 v P65AG101015
Capacitor, mylar, 0.022 uf, 200 v 192P22392 Sprague
Capacitor, 0. 1 uf C280AA/P100K
UL EE RT АИ oe TR АИ
эс ЫЫ оС aep om oen e ST o
p ae LI Т IMEEM aa A
en Selon ger cs c em [Xe А ИСЕ єг!
R401 Resistor, composition, 10K +10%, 1/4 watt БЕСТІ
R402 Resistor, composition, 2. 2K +10%, 1/4 watt Dnm
R403 Resistor, composition, 27K +10%, 1/4 watt
R404 Resistor, composition, 6. 8K +10%, 1/4 watt
R405 Resistor, composition, ІК 10%, 1/4 watt
R406 Resistor, composition, 10 ohms +10%, 1/4 watt (nominal)
R407 Resistor, composition, 10K +10%, 1/4 watt
R408 Resistor, composition, 47K +10%, 1/4 watt
R409 Resistor, variable, 500 ohms
MTC-1-500 Mallory
R410 Resistor, composition, 47K +10%, 1/4 watt
R411 Resistor, composition, 22K +10%, 1/4 watt
8-2
REF
DESIG ITEM
PART NO.
R412 Resistor, composition, 2.2K 410%, 1/4 watt
R413 Resistor, composition, 22K +10%, 1/4 watt
R414 Resistor, composition, 47K +10%, 1/4 watt
R415
R416 Resistor, composition, 100 ohms +10%, 1/4 watt
R421 Resistor, composition, 47K %10%, 1/4 watt
TP9
VO мана
Resistor, composition, ІК +10%, 1/4 watt
Mallory
Ucinite
Ucinite
Ucinite
IN PHASE IF SIGNAL
мултам ос OUTPUT
Л
————— ——— A
wo" OUT OF PHASE IF SIGNAL JEY.
US
тилтант ос OUTPUT
terence LEVEL
4
wf ол OF PHASE IF SIGNAL СА
RESULTANT DC OUTPUT
Figure 8-3. Phase Detector Waveforms
8-1. The phase detector receives a 400 to 500 KHZ
signal from the 400 to 500 KHZ IF and from the low
frequency oscillator. The two signals are compared
and deliver a de tuning voltage to the high frequency
oscillator. To assist in locating locks, three addi-
tional inputs are supplied through the sweep gate.
8-2. The LFO signal is applied directly to the diode
circuit through Q401. As a result of the common col-
lector circuit, the signal applied through Q405 tothe
other side of the diode circuit is inverted 180°. Di-
odes CR402 and CR403 form peak-to-peak detectors,
similar to the deviation meter discriminator (see
Section 6). Dcfiltering is provided by resistors R408
and R410 and capacitors C404, C405, and C406. The
rectifier is referenced to a dc level by the sweep gate
circuit.
8-3. The 400to500KHZ from the IF amplifier A1613
is applied to the phase detector through emitter-fol-
lower Q403. The dc output level of the phase detector
is determined by the phase relationship of the two input
signals as shown in figure 8-3. As long as the phase
relations remain stationary, the dc output level will
remain stationary. If either signal drifts in frequency,
the phase relations will change and the de output level
will change. This change in dc level results in a re-
tuning of the HFO.
8-4. To assist the phase detector in locating a lock,
a tracking bias voltage is applied as a dc reference
voltage through Q404. The voltage is supplied from
divider network R1604 through R1614.
8-5. Tofurtherassistinlocating locks, a three cycle
sweep voltage is also applied through transistor Q404.
When lock is achieved, the IF signal into the phase
detector willbe between 400 and 500 KHZ. IF detector
Q1304 will develop a dc output large enough to allow
Q402to conduct. WhenQ402 conducts, the three cycle
sweep voltage is effectively eliminated.
o+9V (SW)
CR503 | С8504
IN273 | IN273
!
С 514
Ol
TO DISCRIMINATOR
БЭЭ
2504
360
R50I
47K
С501 C507 R5II C509
Кој al IK 220
Ф
ho cec. ЕРЕ ПЕ Р”, А Tr ix |
TO HFO BEAT
DETECTOR
1
NOTES:
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS + IO % 1/4 МАТТ. | TO FUNCTION
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICROFARADS, с ЕСИМ SWITCH
THOSE MORE THAN ONE ARE IN PICOFARADS.
3. X INDICATES FACTORY SELECTED VALUE,
Figure 9-1. Schematic (300KC Amplifier and Limiter)
R501
R504
L501
C504 4
R506
C506
CR502
R508 J
R507
Q501 R502 C503 C502
Q502-
R510 —
R511
C507
R509
R512
C508
L502
Figure 9-2
~
~
WI
C505 C509 R514 C510 Q503
|
Component Location (300KC Amplifier and Limiter)
| е БЕСТІОМ ІХ
9-1
REF
DESIG ITEM
Capacitor, ceramic disc, 0.01 uf
Capacitor, mylar, 0.1 uf
Capacitor, mylar, 0.1 uf
PART NO.
MFR
8512501032
Erie
C280AA /P100K
Amperex
C505 Capacitor, mylar, 0.1 uf
C506 Capacitor, mica, 1000 pf
Capacitor, mica, 220 pf
Capacitor, mica, 220 pf
Capacitor, mylar, 0.1 uf
C511 Capacitor, ceramic disc, 0.001 uf 86127,50 102 7,
Capacitor, mica, 24 pf
Transistor
Resistor, composition, 47K +10%, 1/4 watt
Resistor, 22101203 22K +10%, 1/4 watt
Resistor, composition, 6.8K +10%, 1/4 watt
Resistor, composition, 470 ohms +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 47 ohms +10%, 1/4 watt
Resistor, composition, 47K 2100, 1/4 watt
C280AA/P100K
Amperex
DMI5E361J3
Elmenco
C280AA/P100K
рМ15Е1027
Amperex
Elmenco
Amperex
Wells
Electronics
Wells
Electronics
REF
DESIG
R508
R509
Resistor, composition, 100K +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 27K +10%, 1/4 watt
Resistor, composition, 270 ohms +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
| R522 |
РАКТ МО, MFR
Resistor, composition, 56K £107», 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 5. 6K 4107), 1/4 watt
9-1. Whenthe instrument is setupfor deviation meter 9-3. TYPICAL VOLTAGES. With the unit adjusted
operation, the amplifier and limiter receives a signal asadeviation meter and the limiter current set to the
with a 300 KHZ center frequency from the beat detec- red line, the following are typical voltages:
tor. Theunit delivers an amplified and limited signal
to the discriminator. a. 200 mv peak-to-peak measured at the collector
of Q501.
9-2. The two amplifiers Q501 and Q502 are stagger
tuned (L501 tuned to 270 KHZ and L502 to 330 KHZ) to
provide broad band amplification of a frequency modu- b. “ЮЛ е асс у: measured ut ie са
lated signal. The limiter Q503 and Q504 provides a 2
fixed output level. The auxiliary output to the meter
from diode CR501 provides a means for measuring c. 400 mv peak-to-peak measured at C514 (approxi-
the input level to the limiter. mately square wave).
| MHZ
INPUT
AMPLIFIER
SHAPER
R605
IK
BLOCKING OSCILLATOR
Ф ——Ф-
BUFFER
了
R609 I C604
C605
R610
IK 220 220
Q604
5
2NI742
LA
十 9V
TO 13 MHZ HARMONIC
MULTIPLIER
TO ! MHZ CALIBRATION
OUTPUT JACK
Et $ |= GENERATOR 07:28 MHZ)
5 MFD 421 f à
E — wa E Ын
Figure 10-1. Schematic (Spike Generator)
R601 R605 Q601 R602
R603
R604
C601
C603 C602
R607
Q602 R606
C605 Харх
R609 Q603
R610 Q604
C604
T601
C606
R611 R612
Q605 R614
C608
C607
R613 R615
Figure 10-2. Component Location (Spike Generator) SECTION X
10-1
DESIG
C602 Capacitor, electrolytic, 5 uf, 15 vdc
C603 Capacitor, mica, 33 pf
C605 Capacitor, mica, 100 pf 1
R603 Resistor, composition, ІК 4107, 1/4 watt aou s ERU:
R604 Resistor, composition, 100 ohms +10%, 1/4 watt MOSES ETE
C
R605 Resistor, composition, 1K +10%, 1/4 watt
R606 Resistor, composition, 390 ohms +10%, 1/4 watt
R607 Resistor, composition, 15K +10%, 1/4 watt EDGE
R608 Resistor, composition, 1K +10%, 1/4 watt Шинэ 214
R609 Resistor, composition, 1K +10%, 1/4 watt КК ИШЕ eee
R610 Resistor, composition, 220 ohms +10%, 1/4 watt ЖОЛА Ж Ed
R611 Resistor, composition, 27 ohms +10%, 1/4 watt ОЕ Жам
R612 Resistor, composition, 2.2K +10%, 1/4 watt Pe eee
R613 Resistor, composition, 330 ohms 410%, 1/4 watt BABIES
R614 Resistor, composition, 100 ohms +10%, 1/4 watt Epis) АЗЕ
DEN TE
R615 Resistor, composition, 100 ohms +10%, 1/4 watt
іре)
tj
2
10-2
10-1. The spike generator receives a 1 MHZ sine
wave signal from crystal oscillator assembly A1608
anddelivers 1 MHZ spikes to MHZ selector assembly
A1607, MHZ multiplier assembly A1605, and 1 MHZ
OUTPUT connector J1606. Audio from a modulation
Source is converted to frequency modulation and ap-
plied through the time base to the output signal.
10-2. The incoming signal is amplified by amplifier
Q601 and applied to shaper stage Q602 and Q603. Since
the transistors are opposite types, the direct coupling
provides positive feedback and the stage operates simi-
lar to a multivibrator. The square wave output is con-
verted to spikes by the differentiator in the output cir-
cuit.
10-3. When audio is applied through the external
modulation connector, the audio functions as a vari-
| MHZ
I MHZ- 30 HZ —— | MHZ - 30 HZ
able bias on the shaper (see figure 10-3). The change
in bias affects the point in time when the shaper is
triggered to the opposite state. The change in trig-
gering time affects the time between pulses and thus
effectively the pulse frequency. The amount of fre-
quency change is determined by the amplitude of the
audio input. This type of circuit is sensitive also to
the frequency of the audio input. To provide a rela-
tively constant deviation regardless of the audio fre-
quency, RC circuit (C602 and R606) operates as a de-
emphasis circuit.
10-4. The spike output of the shaper is applied to
blocking oscillator Q604. The blocking oscillator
provides output pulses with sharp rise and fall charac-
teristics. The output of the blocking oscillator is ap-
plied directly to the MHZ selector and through buffer
Q605 to the MHZ multiplier and the output connector.
TRIGGER LEVEL
| MHZ INPUT
WITHOUT AUDIO INPUT
OUTPUT SPIKES
WITHOUT AUDIO INPUT
OUTPUT SPIKES
WITH AUDIO INPUT
TRIGGER LEVEL
| MHZ INPUT
PLUS AUDIO INPUT
Figure 10-3. Modulation Circuit Waveforms
10-3
bt
A A +: EUM
д T И n.
» ШЫ» I у и
ОДРА
BUFFER => 10 (100 KC)
= 20 (SKC)
15К
47K Е“
+9v © * * = ын
R7IO
100
R701 ae M c704 L701 ie | + | стов R713
470 bite
сто! R712
IOO 2.2K
IMC o нь | ean
стоз
100
1 | =
R702 R703 R714 €709
4.7K IK 15K Ї Ко]
E
|
R717 R719
330
R718
15 К
ТРИ
$—— V TEST POINT
L r то I00KC
NOTES HARMONIC SELECTOR
. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS EIO% 1/4 WATT.
2.. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICROFARADS,
THOSE MORE THAN ONE ARE IN PICOFARADS.
, INDICATES FACTORY SELECTED VALUE *
4. ALL. TRANSISTORS ARE TYPE 2N3904-5
ы
Figure 11-1. Schematic (Frequency Dividers)
L702
TO 9V THROUGH
FUNCTION SWITCH
TP 10
TEST POINT
5KC SPIKE
OUTPUT
C706 C708 R715
C704 C703 9701
Figure 11-2. Component Location (Frequency Dividers)
SECTION XI
11-1
ITEM PART NO. MFR
Capacitor, ceramic disc, 0.01 uf 8512501032
Capacitor, mylar, 0.1 uf C280AA /P100K
Capacitor, mylar, 0.1 uf C280AA /P100K | Amperex
Capacitor, mica, 360 pf DM15E361J Elmenco
Capacitor, mylar, 0.1 uf C280AA/P100K | Amperex
Capacitor, mica, 1000 pf DMI5E102J Elmenco
C507 Capacitor, mylar, 0.1 uf C280AA/P100K | Amperex
C508 Capacitor, mica, 220 pf DM15E221J Elmenco
C509 Capacitor, mica, 220 pf DM15E221J Elmenco
C510 Capacitor, mylar, 0.1 uf C280AA /P100K
Capacitor, ceramic disc, 0.001 uf 8617501027,
DM15E240J
CR 503 Diode 1N273 EX
Q502
thru Transistor 2N3904
Q504
R501 Resistor, composition, 47K +10%, 1/4 watt
Capacitor, mica, 24 pf
Electronics
Wells
Electronics
R502 Resistor, composition, 22K +10%, 1/4 watt
R503 Resistor, composition, 6. 8K. +10%, 1/4 watt
R504 Resistor, composition, 470 ohms %10%, 1/4 watt
R505 Resistor, composition, 100 ohms +10%, 1/4 watt
R506 Resistor, composition, 47 ohms +10%, 1/4 watt
R507 Resistor, composition, 47K +10%, 1/4 watt
ITEM
R508
R509
R510 Resistor, composition, 100K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
[| хонь ee О О AR T P
R515 Resistor, composition, 150 ohms +10%, 1/4 watt ШЕ _
56K +10%, 1/4 watt
Resistor, composition,
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
R517 Resistor, composition, 1.5K 41076, 1/4 watt
R518 Resistor, variable, 10K
Resistor, composition, 27K +10%, 1/4 watt
R520 Resistor, composition, 270 ohms 4107, 1/4 watt
R521 Resistor, composition, 10K +10%, 1/4 watt
R522 Resistor, composition, 5. 6K +10%, 1/4 watt
9-1. Whenthe instrument is setupfor deviation meter 9-3. TYPICAL VOLTAGES. With the unit adjusted
operation, the amplifier and limiter receives a signal asadeviation meter and the limiter current set to the
with а 300 KHZ center frequency from the beat detec- red line, the following are typical voltages:
tor. Theunit delivers an amplified and limited signal
to the discriminator. a. 200 mv peak-to-peak measured at the collector
of Q501.
9-2. The two amplifiers Q501 and Q502 are stagger
tuned (L501 tuned to 270 KHZ and L502 to 330 KHZ) to
provide broad band amplification of a frequency modu-
lated signal. The limiter Q503 and Q504 provides a
fixed output level. The auxiliary output to the meter
from diode CR501 provides a means for measuring с. 400mv peak-to-peak measured at C514 (approxi-
the input level to the limiter. mately square wave).
b. 4 v peak-to-peak measured at the collector of
Q502.
TO SPIKE
GENERATOR
TO 100 KC
DIVIDER
NOTES:
|.
2.
BUFFER 1 MC OSCILLATOR
IMC
CRYSTAL |
UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS + IO Yo 1/4 WAT T.
UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICROFARADS,
THOSE MORE THAN ONE ARE IN PICOFARADS.
Figure 12-1. Schematic (Crystal Oscillator)
C803 R803 C802 C801 C806
fau — C808
4/ as 所 R807
2013)
1801
C804
R804
Q801
R801 R805 CR801 R802 C807
Figure 12-2. Component Location (Crystal Oscillator)
SECTION XII
12-1
ITEM PART,NO. MFR
Capacitor, mica, 100 pf рМ15Е1017 Elmenco
Capacitor, electrolytic, 5 uf Р65АС10515 | MEC
Capacitor, mica, 100 pf рм15Е1017 Elmenco
Capacitor, mica, 1600 pf DM19E162J Elmenco
Elmenco
MEC |
Erie
Capacitor, mica, 680 pf DM15E681J
5 uf P65A10515
Capacitor, electrolytic,
ceramic disc, 0.01 uf 851Z5U103Z
Capacitor,
Capacitor, plastic, 0.05 uf PVC215 Mallory
0.01 uf 8517501032 Erie
Capacitor, ceramic disc,
Capacitor, mica, 8200 pf DM30E822 Elmenco
1N273
L703 Coil, 2.5 uh 70F253AI Miller
Q701 Transistor 2N3904
Q702
thru Transistor 2N3904
Q705
Resistor, composition, 39K +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 47K +10%, 1/4 watt
Resistor, composition, 15K +10%, 1/4 watt
Resistor, composition, ІК +10%, 1/4 watt
Resistor, composition, 470 ohms +10%, 1/4 watt
Resistor, composition, 15K +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 100 ohms, +10%, 1/4 watt
Resistor, composition, 470 ohms +10%, 1/4 watt
11-2
PART NO,
DM19E332J
8512501032
DM15E621J
8512501032
C280AA/P100K
DESIG ITEM
Capacitor, mica, 0.0033 uf
Capacitor, ceramic disc, 0.01 uf
Capacitor, mica, 620 pf
Capacitor, ceramic disc, 0.01 uf
C805 Capacitor, mylar, 0.1 uf
C806 Capacitor, ceramic disc 861250102 2
Capacitor, ceramic disc, 0.01 uf 8512501032
C808 Capacitor, ceramic disc, 0.01 uf 8512501032
Capacitor, ceramic disc, 0.001 uf 8617501027,
С810 Capacitor, mica, 500 pf DMI15E501J
Capacitor, mica, 500 pf DM15E501J
C812 Capacitor, 68 pf TCZ-68
Q801 Transistor 2N3904
Q802 Transistor
Resistor, composition, 470 ohms %10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 100 ohms 4100, 1/4 watt
Resistor, composition, 33K +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 3, 3K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 270K +10%, 1/4 watt
Resistor, composition, 100K +10%, 1/4 watt
2N3904
12-1. The crystal oscillator supplies a stable, ac- rectified (CR801) AGC voltage to the oscillator through |
curate 1 MHZ signal to spike generator assembly A1608 resistors R802 and R809 and capacitor C807. The `
and to frequency divider assembly A1612, buffer is tuned by coil L801. The crystal is adjusted
to frequency by MHZ ADJ capacitor C1648.
12-2. The oscillator Q802 is a modified Pierce cir-
cuit designed for stable performance regardless of 12-3. The output of the crystal oscillator (measured
supply voltage changes. . The oscillator is isolated at C801) should be between 0.8 and 1.0 volts peak-to-
from the load by buffer Q801. The buffer supplies a peak.
12-2
CRYSTAL OVEN
NOTES
|. UNLESS OTHEWISE SPECIFIED RESISTOR VALUES ARE IN
OHMS 110% 1/4 WATT: |
THERMO-
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS STAT
°
THAN ONE ARE IN MICROFARADS, THOSE GREATER THAN
ONE ARE IN PICOFARADS.
HEATER
05 1601 |
#344
L— AV
RI6I8 RI6I5
330 20/5W OPERATE
re = ово! о-ВАТТЕВҮ CHARGE
2N669 AMM e o
81617 RI6IG |
_| 470 22K |
CRI602 C1667 |
sc-2 (50 MFD |
15У |
+
DC INPUT VERNIS $1607 |
me --- Сю p------- сева
| 100 MFD/I5V
Г 1 aes
= 91602 | =
AC INPUT 2NI485 |
W 160! = = = Ба! 5 +
|
|
УДА / 15У 4- + + +9۷
922230 R904 R906 + | сө05 R 908 |
21601 1.5 К 470 -Т юмғо 680 CR904 1 TO
SC-2 FUNCTION
= + К} | I SWITCH
л | 902 Е
25MFD
225% ко 9 | TO
270K FUNCTION
4 ДЕБЕ AAA АМ © SWITCH
с 903 2NII84 50K
= 20 gt
= xm cr e MI6OI
R909
— D + 0-50 UA
*— IK R9I2 1 р @)
Ж! | ns ° 470 >
FLI60I |
[эле] |
9901 E
ME 217 IK R913 FUNCTION
4— — A^ + IK ) SWITCH
CR 902 9 Jn
sc-2 890? YA +1 с904 |с906 L ceo7 [+ R910 =
IK -Т юомЕо | ,ol IOOMFD | 一 1K
| 890! CR903 | |5 y 15У
| M3 IW |
4— ~- -$- X > P E e
Figure 13-1. Schematic (Power Supply)
C901 Q901 R903 CR902 R909 C906 C907 CR903 C904
pt
[^
4»
+ ШИ НӨ
ъ КЇНЇ
R905
R914 CR904 CR901 R912 R913 R908 C905 R910 Q902 R906 Q903
Figure 13-2. Component Location (Power Supply) SECTION XIII
13-1
ITEM
Ox
Е EJ
onu
о
C901 Capacitor, electrolytic, 1000 uf, 25 vdc
5199 Diodes, Inc.
EE Fu sia
5% ШЕСІ
C902 Capacitor, electrolytic, 25 uf, 25 vdc
C
C903 Capacitor, ceramic dise; 0.01 uf
C904 Capacitor, electrolytic, 100 uf, 15 vdc
C905 Capacitor, electrolytic, 10 uf, 15 vde
C906 Capacitor, ceramic dise, 0.01 uf
C907 Capacitor, electrolytic, 100 uf, 15 vde
CR901 Diode Bridge
CR 902 Diode
u
Су
ко
СВ903 Diode, Zener
CR904 Diode
CR905 Diode, Zener
Q901 Transistor
2N3904
Q902 Transistor 2N3904
n
@
~
0903
Transistor
2N4234
R901 Resistor, composition, 1.3 ohms +10%, 1 watt
R902 Resistor, composition, ІК 51095, 1/4 watt
R903 Resistor, composition, 10 ohms +10%, 1/4 watt
R904 Resistor, composition, 1.5K +10%, 1/4 watt
R905 Resistor, composition, 8.2K +10%, 1/4 watt
R906 Resistor, composition, 470 ohms %10%, 1/4 watt
R907 Resistor, composition, ІК 4100, 1/4 watt
R908 Resistor, composition, 680 ohms +10%, 1/4 watt
R909 Resistor, variable, 1K MTC-4-1K
Mallory
R910 Resistor, composition, ІК 10%, 1/4 watt
R911 Resistor, composition, 270K +10%, 1/4 watt
R912 Resistor, composition, 680 ohms +10%, 1/4 watt TERN
R913 Resistor, variable, 1K MTC-4-1K Mallory
R914 Resistor, variable, 50K MTC-4-50K Mallory
13-2
13-1. The power supply provides 9 vdc regulated and
12 vdc unregulated power for normal operation or
12 to 15 vdc power for battery charge.
13-2. When ac power is used, the power isconverted
to dc by the power supply (transformer T1601 and
rectifier bridge CR901). When 115/230 switchis turned
to the 115 position, the dual primaries of transformer
T1601 are placed in parallel. With the switch in the
230 position, the primaries are placed in series.
13-3. Either rectified ac or a dc input is filtered and
regulated in the power supply. Transistor Q1602 is
the series element and transistor Q902 provides dc error
amplification. Transistor Q902 is referenced by Zener
diode CR903 and the error signal is applied through
transistor Q903. Potentiometer R909 sets the output
voltage to 9 vdc when the battery charge switch S1606
is turned to the OPERATE position. With the switch
in the BATTERY CHARGE position, potentiometer R913
is placed in parallel with R909 and sets output voltage to
approximately 15 vdc.
TIE
К 13) ї uet
E
ЖТ
( Ton
= io
C1006 Q1006 C1022
OUTPUT TO
о 20-32MHz IF C1005 T1001 ©1001 R1009 R1003 C1020
IXER FREQ MULT
0-32 MHz) (130MHz)
MEASURE
INPUT ©
M
JI6OI (2
Nm T C1002
# У R1001
5 2 | CR1001
T ك 20 R1005
C1007 br
сина 21002 Ч
Ds 11001
| C1001
| R1004
— Ви | R1010 R1006
| | С1011 C1004
| | T1003 £ R1002
eem Te 11 момак, ups CR1004 R1018
! CR1003 L1002
CR 1004
чоо Е е 8) “рс UR С1012 R1011
| % E e, = d Ec Leos сюз Е #1022 ©1003
Е 5 1205 Юк . E 1 Ер K
eM M. CRIOn2 тсс1 | 2-8 аниа У 2 R1013 R1014
SWITCH 100 -------- Тр R1016 R1024
| 21005 Ма OTHERWISE SPECIFIED RESISTOR VALUES C1019
ARE IN OHMS + 10% 1/4 WATT.
Cy UR 2. COMPONENTS MARKED WITH Ж HAVE A FACTORY R1012 C1015
Sa u ЕЕ: RICI3 SELECTED VALUE. NOMINAL VALUE SHOWN. -
CR (со! C1001 = 4.7K сїог2 | 3. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES C1008 $1027
-00 | НАДЕ ео = LESS THAN ONE ARE IN MICROFARADS. THOSE / = R1023
H. с1006 ; ‚ ©1009 272 GREATER THAN ONE ARE IN PICOFARADS. Q1004 р
= 100 со! š 4
| [сое] | 5 R1017
| 21005 1904 15 аюов( 7 = 81016 С1009
EH e woe | C1017
= 9921 л C1013
= 100 Т нозо овоз К1025
cioo4 | | = 270 222K |
— .001 RIO32 CIO23 , - R1020 R1019
+9V
10 001
1
АХ R1026
C1018
T1002 C1010 C1016 ©1005 C1014 #1021
Figure 14-1. Schematic (High Frequency Oscillator) Figure 14-2. Component Location (High Frequency 7
=
н>
REF
DESIG
C1001
C1002
C1004
C1005
C1006
C1007
C1008
C1009
C1010
C1011
C1012
C1013
C1014
C1015
C1016
C1017
C1018
C1019
C1020
C1021
C1022
C1023
CR1001
CR1002
CR1003
ITEM PART NO. MFR
Capacitor, ceramic disc, 0.001 uf 861Z5U102Z Erie
Capacitor, mica, 100 pf DM15E101J Elmenco
Capacitor, ceramic disc, 0,001 uf
8612501027,
Capacitor, trimmer, 2 to 8 pf
538-006NP02-8
Capacitor, mica, 100 pf
Capacitor, mica, 100 pf
рМ15Е1017
Elmenco
DM15E101J
Elmenco
Capacitor, mica, 100 pf
DM15E101J
Elmenco
Capacitor, ceramic disc, 0.001 uf
Capacitor, mylar, 0.1 uf
Capacitor, ceramic disc, 0.001 uf
Capacitor, 6.8 pf
Capacitor, ceramic disc, 0.001 uf
Capacitor, mica, 100 pf
Capacitor, mylar, 0.1 uf
Capacitor, 2.2 pf
Capacitor, ceramic disc, 0.001 uf
Capacitor, mylar, 0.01 uf
Capacitor, mica, 100 pf
Capacitor, mica, 24 pf
Diode, capacitive reactance
Diode, capacitive reactance
8612501027,
C280AA /P100K
Erie
86127501027.
TCZ-6.8
8612501022,
рм15Е1017Ј
С280АА /P100K
TCZ-2R2
8612501022
Capacitor, ceramic disc, 0.001 uf 861250102 2,
C280AA /P10K
Capacitor, ceramic disc, 0,001 uf 8617501027,
рМ15Е1017
DMI5E240J
Capacitor, ceramic disc, 0.001 uf 861Z5U102Z
5С2
SC2
70F276A1
DDO-33
2N3904
Amperex
Erie
===
Em
pec
PART NO. MFR
2N3283
Transistor
2N3283
Transistor
2N3283
2N3283
R1002 Resistor, composition, 100 ohms +10%, 1/4 watt
КИ ео Н
Resistor, composition, 1.8K +10%, 1/4 watt
R1006 Resistor, composition, 56K +10%, 1/4 watt
R1007 Resistor, variable, 1. 5K +10%, 1/4 watt
Resistor, composition, 1. 8K £107», 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 150K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 150 ohms +10%, 1/4 watt
330РС15282
REF || |
DESIG ITEM PART КО. МЕК
R1028 Resistor, composition, 150 ohms +10%, 1/4 watt
R1029 Resistor, composition, 6.8K +10%, 1/4 watt
R1030 Resistor, composition, 220 ohms +10%, 1/4 watt
R1031 Resistor, composition, 2. 2K +10%, 1/4 watt
a R1032 Resistor, composition, 100 ohms 4100), 1/4 watt
R1033 Resistor, gormposition, 4.7K +10%, 1/4 watt
| 151 001 Transformer
| T1002 Transformer
T1003 Transformer
14-1. The high frequency oscillator board receives а
66 MHZ signalfrom megacycle oscillator A1608 and a
dc tuning (lock) voltage from phase detector A1614.
The HFO produces the 152 to 164 MHZ standard signal.
14-2. The 66 MHZ signal is applied to multiplier
Q1005. The output circuit of the multiplier is tuned
to the second harmonic (132 MHZ) by transformer
T1002. The132MHZ output signal is applied to mixer
Q1003. The 152 to 164 MHZ signal from HFO Q1004
is also applied to the mixer. The 20 to 32 MHZ dif-
ference frequency is applied to MHZ selector A1607.
14-3. The HFO Q1004 is a tuned collector oscillator
which uses voltage tunable, capacitive reactance di-
odes CR1003 and CR1004 as the tuning elements. The
lock voltage from the phase detector is applied to the
diodes through a dc filter circuit. The output of the
oscillator is applied through buffer Q1002 to the input/
output circuit.
14-4. The output circuit of the buffer is tuned by ca-
pacitor C1005. The output of the buffer is applied
through diode CR1002, operating as a harmonic gen-
erator, to the output circuit through capacitor C1003
or to beat detector Q1001 through capacitor C1002.
The beat detector is designed for good response to low
frequency beat notes.
14-5. Outputlevelis set by the attenuator and by bias
control of buffer Q1002. 'The attenuator consists of
four 20 db pads which may be added in series. When
the attenuator switch is turned to the antenna position,
one section of the switch selects a fixed bias voltage
for the buffer. In the remaining positions the bias
may be varied by potentiometer R1601.
14-3
Y
) М
un Ls
ü
7 ы.
I ї
|
1
1
u № -
0
vq
Е -
4 p
TO HFC
BEAT DETEC
TOR
Figure 15-1. Schematic (Audio)
sn FUNCTION SWITCH те 一 一 一 一
| S 1602 | !
!
ail le IC (0
г< : та
о о oe TO EXTERNAL fu.
| ЭРХ: 3 6 OC INPUT 3 z
TI № | tan C1106
| -
EI | Seg) > ТО FM 15
TO FM TO FM
L PUT
? AUDIO OUTPU DEV. CKT. Еа
n Ни E 5 o
- | Спо! BATTERY CHARGEI-N- — — — — — xY alle
+T 5MFD/1 PRE - AMPLIFIER 8167 AUDIO OUTPUT А -
Ш
, --” cue | + -— — Е Но + (UNREG)
| 470 Ino T
]
во! $ RuC4 VERA n
27K 22K "е Feto "e
25MFD/I5V Ц + 一
си02 сиоз pice ЕНЕ 14273 六
EE ТС MI60I
5 | I RIII4
IOMFC | .005 0-50MA
у — 2N3904- 33K 3
RIIO2 7 ا Ane VOLUME
j
27K 91102 Yes CONTROL
2N 3904-5 сии
Gom 1000 MFD
- I T 15У РНОМЕ5
2N3906 31602
2N3904-5
*
.— 0 WA
воз ГЭ RIOS > С!105|-- Rilo6 |+ CIIO6 Leue
8.2K .001 2.7K 100 F- *3K T. IOCMFC RIHO Б
MFD/ 15V 3.3K
115 -
+ 2 + +
TWIN TEE NOTCH FILTER LFO BEAT DETECTOR NOTES!
15:55) 1. ALL RESISTOR VALUES ARE IN OHMS + 10%
81115 RIIG 8117 Rus RII2I RII22 ви T E
A ER RIA IK 1124 ee SKC 1/4 WATT UNLESS OTHERWISE SPECIFIED,
l
>ШУУҰ--? ! 4 2. FUNCTION. SWITCH:
си? INPUT
四 [7] 100 FUNCTION
cus ӨТТЕ Ме а Lro
047 ,047 10K IN273 (ЗОО
сша pu
2991 Е FREQ SET
5 KC DEV
15 KC DEV
3. UNLESS OTHERWISE SPECIFIED CAPACITOR
VALUES LESS THAN ONE ARE IN MICRO-
FARADS, THOSE GREATER THAN ONE ARE
IN PICOFARADS.
CR1103 CES. ceto
cius
C1114
R1120
R1122
Q1104 \ C1108
(21102 R1112 Q1105 Q1103
Figure 15-2. Component Location (Audio)
GI
R1119
#1416
К1115
С1104
К1103
R1105
R1121
C1103
К1117
R1106
R1118
R1108
R1109
C1109
R1110
R1113
SECTION XV
15-1
ITEM
PART NO.
Capacitor, electrolytic, 5 uf, 15 vdc
Capacitor, electrolytic, 10 uf, 15 vdc
Capacitor, ceramic disc, 0.005 uf
MFR
P65AG10515 MEC
C1104 Capacitor, ceramic disc, 0.001 uf 861Z5U102Z
C1105 Capacitor, electrolytic, 100 uf, 15 vdc P65AN1610015
C1106 Capacitor, electrolytic, 100 uf, 15 vdc P65AN1610015
Capacitor, electrolytic, 100 uf, 15 vdc
Р65АМ1610015
86125171022.
DM15E101J
P65AG122515
P65AR24100015
C280AA/P47K
C280AA/P47K
C280AA/P10K
C280AA/P10K
С280АА /Р47К
DM15E101J
C1108 Capacitor, ceramic disc, 0.001 uf
Capacitor, mica, 100 pf
Capacitor, mylar, 0.047 uf
Capacitor, mylar, 0.047 uf
Capacitor, mylar, 0.01 uf
Capacitor, mylar, 0.01 uf
Capacitor, mylar, 0,047 uf
Diode
Diode
Q1101 Transistor
Capacitor, electrolytic, 25 uf, 15 vdc
Capacitor, electrolytic, 1000 uf, 15 vdc
Capacitor, mica, 100 pf
8612501022,
Capacitor, ceramic disc, 0, 001
Capacitor, 0.022 uf 192P22392
Ол
a
1
N
1N273
1N273
Q1102 Transistor 2N3904
Q1103
Q1104
Q1105
R1101 Resistor, composition, 27K +10%, 1/4 watt
R1102 Resistor, composition, 27K £107», 1/4 watt
R1103 Resistor, composition, 8.2K +10%, 1/4 watt
Transistor 2N3904
2N3904
Transistor
Transistor
15-2
ЕЗІ ee |.
DESIG ITEM PART NO, MFR
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 2.7K 4100, 1/4 watt
Resistor, composition, 3.3K +10%, 1/4 watt
Resistor, composition, 470 ohms + 10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 2.2K 4107, 1/4 watt
Resistor, composition, 3.9K +10%, 1/4 watt
Resistor, composition, 10 ohms +10%, 1/4 watt
Resistor, composition, 33K +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 10 ohms +10%, 1/4 watt
Resistor, composition, 2.7K +10%, 1/4 watt
Resistor, variable, 1K
Resistor, variable, 500 ohms
Resistor, composition, 1.2K +10%, 1/4 watt
Resistor, variable, 1K
Resistor, composition, 2.7K 4100, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 27K +10%, 1/4 watt
Resistor, composition, 3,3K +10%, 1/4 watt
Mallory
Mallory
Mallory
preamplifier. Audio from the preamplifier or from
the detector driver of the discriminator is amplified
by amplifier Q1103 and push-pull amplifiers Q1104 and
MTC-4-1K
MTC-4-500
MTC-4-1K
15-1. The audio circuit receives signals from the beat
detector or the discriminator and applies audio output
to a speaker or the meter. The circuit can also re-
ceive 5 KHZ signals from the frequency divider and Q1105.
the LFO and deliver beat notes to the speaker and
meter, 15-4. TYPICAL VOLTAGES. With the FUNCTION
switch set to CAL and with a beat frequency of ap-
proximately 200 HZ (one division of the LFO dial), the
15-2. With the function switch 51602 in position 1, tallowinz are typical vol es
the LFO output signal is compared to harmonics of
the 5 KHZ spike input in the LFO beat detector. The
audible 5 KHZ component is eliminated in the twin tee
notch filter. The beat notes are applied to the audio
preamplifier consisting of transistors Q1101 and
a. 9 mv peak-to-peak measured at the base of
Q1101.
b. 150 ту peak-to-peak measured at the emitter of
Q1102. Q1102.
15-3. With the function switch in position 2, beat c. 15 v peak-to-peak measured at the emitter of
notes from beat detector Q1001 are applied to the audio 91104.
MULTIPLIER (X13)
ھچ *
BUFFER AMPL (I3MC)
* * +
MULTIPLIER (X5)
BUFFER AMPL (65 MC)
+ +
TO 130 MC
7 MULTIPLIER
O+9V
Ale + + A
Е нігоі | с1202 сын | ci 05 $81205 WALi202 | слов | стао нігію Ж гоз |сігіз C1214 RI2I5 Иб гоа | сәт
IK — pu E == аты
1 100 IK 620 вк | 620 100 I5K | 100 100 юк H 100
l
— --% —
RI203 Ci207 сігі2 1216 =
100 по 10 10
1
ТМС и 9120! 91202 91203 01204
SPIKE o. oi 5 2N3906-5 2N3283 2N3283
DU Md
С" Cl203 R1208 вїгї3
по 568 10 10
IO! 7 1
1
VA го! de RI207 в\2\! RI2I2 RI2I6 RI2I7
= 220 IK IK 1
| RI204 „вк Mar RI209 81214 RI2I8
и ioo 100 100 100
Ф t + » + AAA. + + =]
-Lci2o4 ci206 L cien CI2I5 |
01 T оо! ШІ
== m
NOTES;
1, UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS +10% 1/4 WATT.
2, UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICROFARADS,
THOSE MORE THAN ONE ARE IN PICOFARADS,
Figure 16-1. Schematic (Megacycle Multiplier)
C1212 L1203 C1210 C1208
Q1204 L1204 C1214 С1213 Q1203 C1207 L1202 R1203 R1205
L1201
C1205
C1203
Q1202
C 1204
Q1201
C1202
R1202
C1201
R1214 РИ // CAT R1209 R1207 C1206 К1206 #1204 #1201
R1211 R1210 R1208 C1209
Figure 16-2. Component Location (Megacycle Multiplier)
SECTION XVI
16-1
REF
DESIG ITEM PART NO,
Elmenco
DM15E331J
C1201 Capacitor, mica, 330 pf
рМ15Е1017 Elmenco
851Z5U103Z
8512501032 Erie
DMI5E131J Elmenco
СТ
СТ
СТ
С1202 Capacitor, mica, 100 pf
C1203 Capacitor, mica, 130 pf DM15E131J
C1204 Capacitor, ceramic disc, 0.01 uf
C1205 Capacitor, mica, 620 pf
C1206 Capacitor, ceramic disc, 0.01 uf
C1207 Capacitor, mica, 130 pf
C1208 Capacitor, mica, 620 pf
C1209 Capacitor, ceramic disc, 100 pf
C1210 Capacitor, mica, 100 pf
C1211 Capacitor, ceramic disc, 0.001 uf
C1212 Capacitor, mica, 10 pf
C1213 Capacitor, mica, 100 pf
C1214 Capacitor, ceramic disc, 100 pf
C1215 Capacitor, ceramic disc, 0.001 uf
C1216 Capacitor, mica, 10 pf
C1217 Capacitor, mica, 100 pf
L1201 Coil
Coil 3370-9
Coil 3370-6
(еј
11202 С
11203 C
Coil 3370-6 С
Transistor
Transistor 2N3283 ЕСЕСІ
11204
01201
01202
01203
2N3283
Q1204
R1201 Resistor, composition, 1K +10%, 1/4 watt
R1202 Resistor, composition, ІК +10%, 1/4 watt
R1203 Resistor, composition, 100 ohms +10%, 1/4 watt
R1204 Resistor, composition, 100 ohms +10%, 1/4 watt
R1205 Resistor, composition, 18K +10%, 1/4 watt
16-2
PART NO. MFR
DESIG ITEM
Resistor, composition, 1. 8K +10%, 1/4 watt
Resistor, composition, ІК 2100, 1/4 watt
Resistor, composition, 10 ohms +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 15K 4100, 1/4 watt
Resistor, composition, 220 ohms +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 10 ohms +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
16-1. The megacycle multiplier receives 1 MHZ multiplier is tuned to the 11th harmonic by coil 1,1201.
spikes from the spike generator and delivers a 66 The 11 MHZ signal is amplified by buffer amplifier
MHZ sine wave to high frequency oscillator board Q1202. This stage is tuned to 11 MHZ by coil L1202.
А1604. The 11 MHZ signal is applied to multiplier 91203,
whichistunedto the 6th harmonic by coil L1203. The
16-2. The 1MHZ spike which is rich in harmonics is 66 MHZ signal is amplified by buffer-amplifier Q1203
appliedto multiplier Q1201. The output circuit of the which is tuned to 66 MHZ by coil L1204.
11302 #1312 #1307 C1306 #1308 #1305 C1301 #1303
十 9V
L1301
AMPLIFIER BUFFER DETECTOR Q1302
БІЗІ! RI3I4
C1306 pu 2 100 100 | сізі C1308 ЕЕЕ
5 || 4.7K 4 C1307 C1304
R1315 |o R1301
100K = R1310
IF INPUT CI302 R 1306 C1309 e R1306
| 1 47 001
(3-4 MHZ) + £j RISO! VENT 91302 п فاا С/503 81316 SA
Б 19 d R1311
RI309
етае vid 330 R1315 R1317
pis x ү ©1303 R1302
ЕЕ ли cin Яр:
| С1303
-一 +
2
ТО PHASE DET TO SWEEP
(MAIN. LOCK) GATE
NOTES: #1314 C1310 СК1301 ©1304 C1302
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS + IO % 1/4 WATT.
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICROFARADS ,
THOSE MORE THAN ONE ARE IN PICOFARADS,
Figure 17-1. Schematic (400 to 500 KC Mixer and Amplifier)
Figure 17-2. Component Location (400 to 500 KC Mixer and Amplitier)
| x SECTION XVII
| 17-1
REF
DESIG
ITEM
PART NO.
MFR
C1301
Capacitor, mylar, 0.1 uf
C1302
Capacitor, mylar, 0.1 uf
C280AA/P100K
А
Amperex
C280AA/P100K
Amperex
Capacitor, mylar, 0.1 uf
Capacitor, mica, 130 pf
C1306
C1307
Capacitor, mica, 820 pf
Capacitor, mylar, 0.1 uf
Capacitor, mylar, 0.1 uf
C280AA/P100K | Amperex
DM15E131J Elmenco
DM15E821J Elmenco
C280AA/P100K | Amperex
C280AA/P100K
Amperex
Capacitor, mica, 270 pf
C1308
C1309
C1312
CR1301
L1301
L1302
Q1301
Q1302
Q1303
Q1304
R1301
Capacitor, ceramic disc, 0.001 uf
Capacitor, ceramic disc, 0,001 uf
Capacitor, mylar, 0.1 uf
Capacitor, mylar, 0.1 uf
Diode
Coil
Coil
Transistor
Transistor
Transistor
Transistor
Resistor, composition, 47K +10%, 1/4 watt
R1302 Resistor, composition, 10K +10%, 1/4 watt
R1303
Resistor, composition, 4.7K 2100, 1/4 watt
Resistor, composition, ІК %10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 47 ohms +10%, 1/4 watt
Resistor, composition, 47K +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 330 ohms %10%, 1/4 watt
Resistor, composition, ІК +10%, 1/4 watt
17-2
DM15E271J Elmenco
8612501022 Erie
8612501022 Егіе
С280АА/Р100К
С280АА/Р100К
1N273
387-1300
387-1300
2N3904
2N3904
2N3904
2N3904
Amperex
Amperex
Wells
Electronics
Wells
Electronics
ITEM
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 4. 7K +10%, 1/4 watt
R1314
17-1. The mixer and amplifier receives two signals
from 100 KHZ selector A1610 and delivers the 400 to
500 KHZ difference signal to phase detector and sweep
gate A1614. The assembly also furnishes a sweep
gate control voltage.
17-2. A З to 4 MHZ and a 2.6 to 3.5 MHZ signal are
applied to mixer Q1301 which produces a 400 to 500
KHZoutputsignal. This signal is applied to the phase
detector through amplifier Q1302 and buffer Q1303.
The output circuit of the mixer is tuned by coil L1301
and the output circuit of the amplifier is tuned by coil
Resistor, composition, 100K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
R1315 Resistor, composition, 100K +10%, 1/4 watt
R1316 Resistor, variable, 5K MTC-1-5K Mallory
R1317 Resistor, variable, 10K
L1302. Potentiometer R1316 provides control of out-
put signal level.
17-3. Detector Q1304 produces a dc output with a
level determined by the frequency of the buffer output
signal. With a signal within the 400 to 500 KHZ range,
amplification is maximum and therefore the output of
the detector is maximum. When the signal out of the
buffer is outside the 400 to 500 KHZ range, the de-
tector dc output voltage willfall below a predetermined
threshold voltage. This threshold voltage is used to
prevent false locks on harmonics of the IF signal or
harmonics of the LFO frequency.
MC TO SWEEP GATE
SELECTOR = —— — —— — — م
SWITCH
| $ 1603
|
САР. VALUE 1.5 -20 pf |2 PLACES (0/613-01624)
Clel3 Сєз СІбІ5 cl6I6 — С67 CI6I8 CI6I9 CI620 CI621 CI622 СІ623 CI624
ITI
TEST POINT TPZ
CAR VALUE 3-35 pf 6 PLACES (CI60I - СІ606) CAP. VALUE 1,5-20 pf 6 PLACES (CI607 — СІ6І2)
1601 cl602 СІ603 СІ604 Ї 21606 60607 01608 | Ї Cl6ll ci6i2
с
1р5
C1849 0160, свз, 223 Ч 01654 ze ese, n a
TO 3 TO 4
MC MIXER
17 TO 28 MC
OSCILLATOR
t RI4IG
-T1401 l RI4IO 5K
<! | жатк
SNI
I
TO 3TO 4
MC MIXER
С1421 | сласт
e А ya 1 И +001
552 азо | RIATA = INPUT FROM
POINT Е ЕЈ ААХ Эр MER, Du
cl408 | ий .00
680 $ s Ae
= в CRI407
| = 2; sc 5
R1403 oE o+9v
ыг JE C1403 RI4I3 С1412 T
- «0! ок „Ol
RI4I9
+9v o Riz 150 К 5 INPUT
R 1404 = 100 G
100 3 CYCLE
RIOT 22 二 = | SWEEP
І = =
C1406 cl409
330 100 TEST
Ез 1404 gaci L criso CR J SS TTT POINT
М IN273 1403 X AN CRI405
INSI4
1
TMoe || 1№914
er aos (d 21 1425 NOTES:
3 Rae 220K cuis 1. UNLESS OTHERWISE SFECIFIED RESISTOR VALUES ARE IN OHMS
IMC SPIKE уу CRI402 | AN 六 Ян ŁO% 1/4 WATT.
14273 ENG CRI š ! 2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE
1406
do 1м94 син
001 ARE IN MICROFARADS, THOSE MORE THAN ONE ARE IN PICOFARADS.
RI406 RI4I5 3, Ж SELECTED VALUE.
IK 2:2K
|
| _ SHAPER _ _______- PHASE DETECTOR ___
Figure 18-1. Schematic (Megacycle Selector)
#1416 C1420 C1418 ТРІ ©1404 C1416 #1421
R1404 C1413
|
Figure 18-2. Component
C1414 R1419
Location (Megacycle Selector)
T1403
R1403
SECTION XVIII
18-1
WA ITEM PART NO. MFR PART NO. MFR
eps Capacitor, ceramic disc, 0.001 uf 8612501022 Егіе Тгапѕіѕїог 233283
ET Capacitor, ceramic disc, 0.01 uf 851Z5U103Z Erie R1401 Resistor, composition, 56K +10%, 1/4 watt
C1403 Capacitor, ceramic disc, 0.01 uf 851Z5U103Z Erie R1402 Resistor, composition, 22K +10%, 1/4 watt
R1403 Resistor, composition, 100 ohms 410%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 470 ohms +10%, 1/4 watt
Capacitor, mica, 33 pf DM15E330J
Capacitor, ceramic disc, 0.001 uf 851Z5U102Z Erie R1404
330 pf DM15E331J Elmenco R1405
DM15E101J Elmenco
Capacitor, mica,
R1406 Resistor, composition, 1K +10%, 1/4 watt
Capacitor, mica, 33 pf N750
R1407 Resistor, composition, 15K +10%, 1/4 watt
R1408 Resistor, composition, ІК +10%, 1/4 watt
R1409 Resistor, composition, 680 ohms +10%, 1/4 watt
Capacitor, mica, 390 pf
Capacitor, mica, 100 pf
Capacitor, mica, DM15EI101J
*R1410 Resistor, composition, 4, 7K +10%, 1/4 watt *selected value
R1411 Resistor, composition, 2.2К +10%, 1/4 watt
R1412 Resistor, composition, 100 ohms +10%, 1/4 watt
430 pf DM15E431J
Capacitor, mica,
8512501032
Capacitor, ceramic disc, 0.01 uf
R1413 Resistor, composition, 10K +10%, 1/4 watt
R1414 Resistor, composition, 4.7 10%, 1/4 watt
R1415 Resistor, composition, 2.2K +10%, 1/4 watt
R1416 Resistor, variable, 5K MTC-1-5K
R1417 Resistor, variable, 5K MTC-1-5K Mallory
R1418 Resistor, composition, 100 ohms +10%, 1/4 watt
R1419 Resistor, composition, 150K £109», 1/4 watt
R1420 Resistor, composition, 1K +10%, 1/4 watt
R1421 Resistor, composition, 3.3K +10%, 1/4 watt
R1422 Resistor, composition, 39K +10%, 1/4 watt
R1423 Resistor, composition, 10K +10%, 1/4 watt
R1424 Resistor, composition, 100 ohms +10%, 1/4 watt
CR1403
thru
CR1406
R1425 Resistor, composition, 220K 4109, 1/4 watt
2
:
ако | mem E E o9 o -
o| төвөө — pm | S
Га meme 2 (ээ
18-2
18-1. The megacycle selector receives a 20 to 32
MHZ signal from mixer Q1003 and a 1 MHZ spike from
the spike generator. The selector delivers two sig-
nals with a difference frequency between 3 and 4 MHZ,
to mixer Q1501 of 100 KHZ selector A1610.
18-2. The 20 to 32 MHZ signal from mixer Q1003 is
amplified by IF amplifier Q1404. The output circuit
is tuned by transformer T1403 and by selection of
capacitors. MHZ selector switch S1603 selects a
trimming capacitor tuned for maximum response
within a one megacycle range.
18-3. Oscillator Q1403 is tuned to approximate fre-
quency by selection of capacitors (C1613 through
C1624) and to an exact multiple of 1 megacycle by the
phase detector. The oscillator supplies a 17 to 28
MHZ signal to the 3 to 4 megacycle mixer and to the
diode bridge of the phase detector.
18-4. The shaper Q1401 and Q1402 receives a 1 MHZ
Spike from the spike generator and supplies a gate
pulse with a very narrow pulse width to the diode
bridge. As in the shaper of the spike generator (see
Section 10), the back-to- back transistors provide posi-
tive feedback and therefore sharp rise and fall charac-
teristics. The pulse is applied to the diode bridge
through transformer T1402.
18-5. When the gate pulse is applied to the bridge,
the four diodes conduct and apply a portion of the os-
cillator signal to reactance diode CR1407. This por-
tion is filtered by capacitors C1413 and C1414 and is
a ас voltage. As shown in figure 18-3, the dc output
levelis determined by the phase relations between the
gate pulse and the oscillator signal. If the local os-
cillator drifts, the phase relations change and pro-
duce a change in dc output. The change in dc output
changes the effective capacitance of the reactance di-
ode and automatically corrects the frequency drift.
18-6. This type of bridge has a very narrow lock
range. To assist the circuit in locating a lock volt-
age, athree cycle sweep voltage from sweep generator
Q301 and Q302 is applied to diode CR1407. Before
lockis achieved, this three cycle signal is effectively
ade sweep voltage which sweeps the oscillator over a
broad frequency range. Once lock is achieved, the
circuit compensates for the dc change and effectively
cancels the sweep action.
18-7. Resistors R1416, R1417, and R1418 are part of
the voltage divider network for the final phase detector.
The network supplies a dc reference voltage to the
detector.
GATE PULSE | |
LOCK POSITION
LOW FREQUENCY
OSCILLATOR
— Q1403
SIGNAL
DC OUTPUT LEVEL
DC OUTPUT
DC OUTPUT
Figure 18-3. Phase Lock Bridge Waveforms
18-3
pne у
50 et D
VU ХҮС!
9 тор
ТР6 ©1502 #1505 C1506 T1501 C1504 C1511 C1505
M nece —————M —— Жү ———— IE i
EL * ) o сё 3 4 = a E d о * ) (2) | 2 5 5 5 6 7 ДӘ 2 ж о | 2 4 ta 6 ха 8 a H
C1520 R1512
сл 44 с Ис Ле сл И е7 cc с Z| сл ce с e сл | c7| c^| c
1625 |1626 |1627 |1628 |1629 11630 ]163! (1632 11633] 634 1635 [16361163711638 | 1639 |1640 11641 |1642 1643 | |644 са 1 52 1
15 TO 20 pf 1ОРЬАСЕ5 15 TO 20 pf (0 PLACES C1513
3-4 MC MIXER © E 3-4MC ЇЕ AMPLIFIER = R1524 R1515
ES ^ | icol | I ams | R1527 CR1503
i | pra e's "sr яға ҖӨЕ Го Loss CR1501
| с: IOK ! Е 4: N TI502 ] 33 Ol | ©1504 CR1502
18 The 1 Ё1526 R15 >
| Es R151
2 Lm | за | р Та BUDE CR1504
20-32 MC O ;
Y RIS TEST POINT C1517 R1511
| Е TP TP5 C1507
7-28 MC Her. офа кс CR1505 ; C1518
CI5IO 81514 l'GLiso2 С1515 81518 81523 = T1503 C1516
е! “ік [ош 5 b {5 ў R1522 R1514
Pores 1 t jd C 1 5 1 9 L 1 502
iT cul = R1523 R1502
OSCILLATOR DETECTOR “nn OSCILLATOR. ER C1514 C1502
| Атаве [БЕ] "B; RI526 Q 1 503 TP3
dus T .ol E C1501
| TEST POINT R1517
Го
ПЕ T1503 WA R1518 R1506
81515 81519 | R1503
ыг 3 215 1 TO 400-500КС Ё 1509
5 | x Gu = MIXER е ;
100K = У باسنت |
Joo Ks ji Jm 1 a R1525 | 7 \ R1504
DIVIDER j CRI501 81516 CRISO5 * E 3 j ë | : | Ё
E IOK т я мі. L
IN273 Тав уе 2 ы оо OTHERWISE SPECIFIED = : С1503
RESISTOR VALUES ARE IN OHMS T1502 : 4
CRI503 | +10% 1/4 WATT. :
- ЖО cis Рр |
ONE ARE IN MICROFARADS,THOSE P ! R1507
3 CYCLE 81520 15158 1 С1521 81524 | ©1524 $ 81527 НЫ А C1522
Зуслан Е 15К :001 | 27k T .0 $ ек | 3. Ж PROGRESSIVELY SHORTING 81508
IE uoc 4 CONTACTS. ,
UNA 23 d . a МОМА R1521 C1509 C1515 | C1508 | 11501. 01501
3 5 mem. d Р С1510 1501
Figure 19-1. Schematic (100 KHZ Selector) Figure 19-2. Component Location (100KC Selector)
SECTION XIX
19-1
masr 2!
DM15E3907
ET
8512501032
0.001 uf 8612501022,
MR330-.01 Paktron
Capacitor, ceramic disc, 0.01 uf
Capacitor, ceramic disc, 0.001 uf
Capacitor, ceramic disc, 0.01 uf
C1504 Capacitor, ceramic disc, 0.01 uf
C1505 Capacitor, mica, 500 pf
Capacitor, mylar, 0.1 uf
Capacitor, mica, 39 pf
Capacitor, mica, 27 pf
Capacitor, mica, 130 pf
Capacitor, ceramic disc, 0.01 uf
ceramic disc,
Capacitor,
Capacitor, mica, 130 pf
Capacitor, mica, 560 pf
C1517 Capacitor, mica, 220 pf
C1518 Capacitor, ceramic disc, 0.001 uf
C1519
C1520
C1521
C1522
C1523 Capacitor, ceramic disc, 0.01 uf
C1524
Capacitor, ceramic disc, 0.01 uf
Capacitor, mica, 33 pf, N750 Centralab
DMISES821J
8512501032 Erie
Erie
Capacitor, mica, 820 pf
Capacitor, mica, 33 pf
Capacitor, ceramic disc, 0.01 uf 861Z5U103Z
CR1501
thru 1N273
CR1504
[m И
[ww |
[ww шижин
L1501 Coil, 10 uh 70F105A1
Transistor
Transistor
Transistor
19-2
REF
DESIG PART NO. MFR
ITEM
Resistor, composition, 100 ohms +10%, 1/4 watt
R1501
R1502 Resistor, composition, 33 ohms +10%, 1/4 watt
R1503 Resistor, composition, 27 ohms +10%, 1/4 watt
R1504 Resistor, composition, 10 ohms +10%, 1/4 watt
R1507 Resistor, composition, 10K 4107, 1/4 watt
R1510 Resistor, composition, 27 ohms +10%, 1/4 watt
R1524 Resistor, composition, 2.7K +10%, 1/4 watt
R1525 Resistor, composition, 100 ohms +10%, 1/4 watt
TPs
thru Jack 119437-11 Amperex
TP6
UTC
19-1. The 100 KHZ selector receives two signals
from megacycle selector A1607 and a 100 KHZ signal
from frequency divider A1612. The selector delivers
two signals with a difference frequency between 400
and 500 KHZ to mixer Q1301 of 400 to 500 KHZ mixer
and amplifier A1613.
19-2. A 20 to 32 MHZ and 17 to 28 MHZ signal are
applied to mixer Q1501 which produces a 3 to 4 MHZ
output signal. The output circuit of the mixer is tuned
to provide a 1 megacycle band pass. . The 3 to 4 MHZ
signalis amplified by amplifier Q1503 and delivered to
the 400 to 500 KHZ mixer. 100 KHZ selector switch
51604 selects a trimming capacitor tuned for maxi-
mum response within a 100 KHZ range.
19-3. Oscillator Q1504 is tuned to approximate fre-
quency by selection of capacitors (C1635 through C 1644)
and to an exact multiple of 100 KHZ by the phase de-
tector. The oscillator supplies а 2.6 to 3.5 MHZ sig-
nal to the 400 to 500 KHZ mixer.
19-4. The phase detector operates inthe same manner
as the phase detector in the megacycle selector (see
Section 18). The detector receives a 100 KHZ gate
pulse from frequency divider A1612. The 100 KHZ
pulse is shaped by blocking oscillator Q1502.
19-3
, á 3, |
а he isle M Act rio
| | al) era ЖАЛ ТАКТИКЕ ie
53.7 JUPE
Po <
EXTERNAL MODULATION
qu
Eis
IN4143
CRI7O2
ble.
TO MODULATION CIRCUIT
1% 9-7 о TO+9V
н тысы u ONE EXTERNAL
E
1. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES
| Figure 20-1. Schematic (1KHZ Oscillator)
R1702 C1705 К 1708 CR1702
R1704 C1902 R1705 C1704 ©1703 R1710
Q1705
21703
(91707
R1701 Q1704
R1712
C1701 Q1701 ејјудо. 21706 051701 СК1701 R1711
R1703 R1707 C1706 R1709
Figure 20-2. Component Location (1 KHZ Oscillator)
SECTION XX
20-1
| REF
DESIG ITEM
| C1704 Capacitor, electrolytic, 25 uf, 15
|
Gyo Capacitor, plastic, . 01 uf = 1%, 50 v.
©1702 барасшов; plastic, СОЛ uo Eo БОКУ
| С1703 Capacitor, electrolytic, 25 45, 15 v
ve)
PART NO, MF
MR330-.01 Paktron
MR330-.01
P65AG122515 MEC
P65AG122515 MEC
Paktron
C1705 Capacitor, electrolytic; 25 uf, 15
| эше “Оз
С1706 Capacitor, electrolytic, 25 uf, 15
| -
C1707 Capacitor, electrolytic, 25 uf, 15
СЕ1701 Diode
pet =
CR1702 | Diode
P65AG122515 MEC
P65AG122515 MEC
P65AG122515 MEC
1N4148 GE
1N4148
Q
tj
DS1701 Lamp, incandescent 344 GE
Ы Q1701 Transistor 2N3904
ict
Q1702 Transistor 2N3904
| e 05 Transistor 2N3904 КЕСЕЛ
(1704 Transistor 2N3904 DN CEN
ШТ 01705 | Transistor | 2N3906 И К ШШ
| R1701 Resistor, composition, 22K +10%, 1/4 watt p s ID EMEN
R1702 Resistor, film, 15.8K +1%, 1/8 watt RN60D1582F ШАШАР
R1703 Resistor, film, 15.8K +1%, 1/8 watt RN60D1582F
R1704 Resistor, composition, 12K +10%, 1/4 watt
R1705 Resistor, composition, 330 ohms +10%, 1/4 watt МИ
R1706 Resistor, variable, 500 ohms | MTC-1500
R1707 Resistor, composition, 3. ЗК +10%, 1/4 watt БИШЭЭ
R 1708 Resistor, composition, 1. 8K +10%, 1/4 watt uox Ay TT
R1709 Resistor, composition, 47K 10%, 1/4 watt Seer ШЕП
R1710 Resistor, composition, 330K +10%, 1/4 watt Weg EE RS
R1711 Resistor, composition, 2. ТК +10%, 1/4 watt ИИО н Ет
R1712 Resistor, variable, 5K
20-1. Thecircuitforms an RC type of oscillator (ne-
gative resistance) with both positive and negative feed-
back. The oscillator delivers a 1 KHZ signal with an
amplitude of approximately 6 v peak-to-peak.
20-2. The positive feedback is applied through the RC
network consisting of capacitors C1701 and C1702 and
ofresistors R1702 and R1703. At 1 KHZ, the feedback
throughthis circuit is maximum (since the phase shift
throughthe series and parallel networks are approxi-
mately equal and of opposite sign).
20-2
20-3. The negative feedback is applied through vari-
able resistor R1706 and minimizes distortion. Lamp
DS1701isusedas a variable resistive element. When
gainthroughthe oscillator is low, current through the
lightis low and thus the emitter resistance is low. As
gain increases, resistance increases and effectively
increases the amount of negative feedback.
20-4. The output waveform at C1707 should be a
reasonable pure sine wave, 1000 HZ, with an ampli-
tude of approximately 6 v peak-to-peak. Adjust R1706
as required to minimize distortion.
MODEL RFA-40
RF ATTENUATOR
The Model RFA-40 is a 40db attenuator, designed for use with the
Gertsch FM-9E Frequency meter and must be used with the FM-9E
to provide accurate output levels in the .05 to 5uv range.
In addition to providing a 20 to 1 voltage reduction of the FM-9 output,
the RFA-40 protects the frequency meter from damage due to ac-
cidental keying of transceivers.
Accidental keying of the transmitter, when directly connected to the
FM-9 through the RFA-40, may result in a significant change in the
impedance or attenuation of the RFA-40. A set of spare resistors
is provided with the unit, should this occur.
The replacement resistors are mounted as shown in the exploded
view below. Particular attention must be given to the dimensions
shown.
кг
Jl J2
G 2
Parts List
Connector, UG-89 C/U
Connector, UG-88 C/U
Resistor, film, 51 ohms + 1%, 1/8 м
Resistor, film, 2.49K+1%, 1/8 w
Resistor, film, 51 ohms + 1%, 1/8 w
THE SINGER COMPANY
МЕРС Б ОКА ЕТО DINI аан и aem
Design and production of PANORAMIC + SENSITIVE RESEARCH + EMPIRE + GERTSCH instruments for measurement
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Model RFA-60 ВЕ Attenuator
The Model RFA-60 is a 60 db attenuator which allows keying of a
transmitter when directly coupled to the Model FM-9 Frequency
Meter.
Connect the attenuator into the test circuit as follows:
T» Connect the cable end (BNC connector) of
the attenuator directly to the INPUT/OUTPUT
connector of the Model FM-9.
Connect the transmitter/receiver to one of the
UHF connectors of the tee.
The remaining UHF connector of the tee is for
connection of a dummy load or an antenna.
The 60 db (1000:1 voltage) attenuation applies in the fundamental 150
to 162 MC range only.
Receiver sensitivity checks may be made with the above test circuit,
however, allowance must be made for the 1000:1 attenuation. Use
the 5mv scale of the Model FM-9 to obtain a .5uv output.
li YA THE SINGER COMPANY
27507 | METRICS DIVISION zzz cmm
Design and production of PANORAMIC • SENSITIVE RESEARCH * EMPIRE + GERTSCH instruments for measurement
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