Document text
MAINTENANCE BOOK
for MODEL FM-9
FREQUENCY METER
DEVIATION METER
SIGNAL GENERATOR
| THE SINGER COMPANY * METRICS DIVISION
Е SINGER
“А Trademark of THE SINGER COMPANY à
INSTR ОСЛО Ne MAN U AL
Lertsch
MAINTENANCE BOOK
for MODEL FM-9
FREQUENCY METER
DEVIATION METER
SIGNAL GENERATOR
Sensitive
Research®
SINGER
5
THE SINGER COMPANY * METRICS DIVISION
Rev. 4/66
WA EV ЕТА INC ПУ
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:
Commander* Instruments: Potentiometers, Bridges,
Volt Ratio Boxes and Standard Resistors
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 Trademark of THE SINGER 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 Commander* Етріге", Panoramic*, and Sensitive Research® instruments.
Contact Metrics Division, Los Angeles, California for Gertsch* instruments.
(2) Include data on symptoms, measurements taken, suspected location of trouble, maintenance action taken, and any other relevant data.
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TABLE OF CONTENTS
Section
I ב E wd
II BIEDDOMAINTENANOR) зае ENEE
III О А И са инс
IV MOINES ден hin dame E сода а та ка га
V *LOW FREQUENCY OSCILLATOR А1615 ..........
VI *DISCRIMINATOR A1603
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ҮП *SWEEP GENERATOR AND BUFFER А1616 .........
VIII *PHASE DETECTOR AND SWEEP GATE A1614
ооо
ЇХ *300 KC AMPLIFIER AND LIMITER А1602 .........
X БЕ GENERATOR AT608 UU ele ath RR
XI *EREQUENCY DIVIDERS А 1612. ооо фана ща а
XII «(ОНУ ВАН ОВОР б АТОН ATOLL ИО.
XIII *POWER SUPPLY A1609
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XIV *HIGH FREQUENCY OSCILLATOR A1604
XV *AUDIO A1606
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XVI *MEGACYCLE MULTIPLIER A1605 ...............
XVII *400 to 500 KC MIXER AND AMPLIFIER A1613 ......
XVIII *MEGACYCLE A1607 А.
XIX ж100 KC SELECTOR A1610
*Each section includes a schematic, parts location view, parts
list, and circuit description.
LIST OF TABLES
1 Селега рее сано ое ее ee tene s
2 BriesOperatinewnstructions. са ааа ioen u. us i а
LIST OF ILLUSTRATIONS
Figure
Model FM-9
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Сотролеле Location Eront Panel 72222222522...
Componentéilboeation (Back Panel 222252222222...
Componenti Location Тор Chassis 222222722222.
Component Location, Bottom Chassis ............
Component Location, Tuning Capacitors ..........
Component Location, Tuning Capacitors ...........
Schematic (Low Frequency Oscillator) ............
Component Location (Low Frequency Oscillator) .....
Schematicn(Discriminator) 0 l ak ba 224755 ere ere dene
Component Location (Discriminator) .............-.
Schematic (Sweep Generator and Buffer) ...........
Component Location (Sweep Generator and Buffer) Ж
Schematic (Phase Detector апа Sweep Gate) .........
Component Location (Phase Detector and Sweep Gate) ..
DhaseuDetectorAWaveftorms./. 6. 35 skid ew Sees nw le
Schematic (300 KC Amplifier and Limiter) .........
Component Location (300 KC Amplifier and Limiter) ...
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LIST OF ILLUSTRATIONS (CONT)
Schematic (Spike Generator) ............
Component Location (Spike Generator) .....
Modulation Circuit Waveforms ...........
Schematic (Frequency Dividers) ..........
Component Location (Frequency Dividers) ....
Schematic (CrystalOscillator) уг
Component Location (Crystal Oscillator) ....
Schematic (Power Supply) TT 22”
Component Location (Power Supply) .............
Schematic (High Frequency Oscillator) .....
Component Location (High Frequency Oscillator)
Schematic (А пето) УНА an СЕРВИРА
Component Location (Audio) эт
Schematic (Megacycle Multiplier) .........
Component Location (Megacycle Multiplier) ...
Schematic (400 to 500 KC Mixer and Amplifier)
Component Location (400 to 500 KC Mixer and
Атари тет) И ЕРИ.
Schematic (Megacycle Selector) .........
Component Location (Megacycle Selector) ...
Phase Lock Bridge Waveforms ..........
Schematic (100 KE Selecto) m"
Component Location (100 KC Selector) ...........
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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
Tu
18-1
18-1
18-3
19-1
19-1
NOTICE
The offset frequencies for
measuring deviation have
been changed for ease of
operation. Move the fre-
quency up or down 300KC
when at 150-162MC and
100KC at 450-486MC.
Effective from Serial No.
266 and up.
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Model FM-9
SECTION |
INTRODUCTION
1-1. GENERAL.
1-2. This instruction book supplements the information
included in the Model FM-9 Operation Book. Refer to
the Operation Book for a complete description, operation
instructions, and general theory of operation.
1-3. General maintenance data is included in sections
II, HI, and IV. Sections II and III 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 V through XIX provide maintenance data
for the individual circuit boards. Each section includes
a schematic, component location view, parts list, and
a detail theory of operation.
TABLE 1. GENERAL SPECIFICATIONS
FREQUENCY
RANGE
Fundamental
Harmonics
150 - 162 mc
450 - 486 mc
ACCURACY + 0. 0002% (+ 2 ppm)
(After 30 minutes warmup)
DEVIATION MEASUREMENTS
0 to 15 kc
x 595 of full scale
SENSITIVITY, FREQUENCY, AND DEVIATION
MEASUREMENTS
150 to 162 mc
450 - 486 mc
RF OUTPUT
RANGE
150 - 162 mc 50 mv to 0.5 uv
ACCURACY (Calibrated into 50 ohm load)
0.5 uv
| + 2 db (With RFA-20)
All other points
..+4db
ZERO BEAT INDICATORS
Built-in audio amplifier
and speaker
EXTERNAL FREQUENCY MODULATION
150 - 162 mc
300 to 3,000 cps . . 9 kc deviation
2 kc minimum
450 - 486 mc
300 to 3,000 cps . 15 kc deviation
6 kc minimum
Required Audio Input . . 1 vrms (approximate)
AUXILIARY OUTPUTS
IF ALIGNMENT SIGNAL
Frequency 400 - 500 kc, with high
harmonic content
Amplitude 3 v peak to peak
Source Impedance ...1k
CRYSTAL CALIBRATION
SIGNAL 1 mc pulse
115/230V, 50 to 400 cps,
ך va
11.5 to 15 v, approximate
0. 3 amp average current,
NEGATIVE ground
OPERATING TEMPERATURE
32° to 120°F (0° to 50°C)
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-20 attenuator
1-1
TABLE 2.
TRANSMITTER FREQUENCY CHECK
10.
11.
Do not key transmitter when directly coupled
tothe FM-9. Excessive input signal will damage
the instrument.
With the unit plugged into a suitable power source,
allow a 30 minute warm-up to stabilize the crystal
oven.
Extend internal telescoping antenna.
Turn RF OUTPUT switch to ANT. position.
Turn FUNCTION switch to LFO CAL position.
Set MC, 100KC and LFO dials to channel frequency.
NOTE: 150MC band channels are direct reading
450MC band channel frequencies must be
divided by 3.
Set LFO dial to nearest 5KC CAL point (yellow
calibration marks).
NOTE: 150MC band channels are on calibration
marks.
Adjust LFO CAL knob for zero beat, using speaker
and beat meter.
Turn FUNCTION switch to MEAS. GEN. position.
Reset LFO dial to 450MC channel divided by 3.
Ignore this step for 150MC band.
Key the transmitter. The tone heard in the speaker
is the difference between the transmitter frequency
and the channel frequency. Тһе 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 the FM-9
LFO control for zero beat. The ЕМ-9 LFO dial
has three 200 cycle markers on each side of the
channel for this purpose.
TRANSMITTER DEVIATION CHECK
1:
1-2
After the transmitter frequency has been set, change
the FM-9 dial readings (either up or down) by 300KC.
NOTE: A change of only 100KC is required for
450MC channels since the 3rd harmonic
is being used.
Turn FUNCTION switch to LIM. CUR. position.
BRIEF OPERATING INSTRUCTIONS
Key transmitter for limiter current reading. Meter
reading must be above red line. If not, increase
coupling and recheck frequency.
Turn function switch to FREQ. SET position. Meter
needle should be on red line. If not, adjust FM-9
LFO dial for red line reading.
Turn FUNC TION switch to 5KC or 15KC position.
Noise will cause a residual deviation reading when
the transmitter is not keyed.
Key the transmitter and modulate by speaking into
the microphone. Тһе peak deviation is read directly
on the meer.
NOTE: The deviation on either 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
E
10.
Connect FM-9 INPUT/OUTPUT jack to receiver
antenna connector.
Do not key transmitter while directly connected
to the FM-9.
Turn FM-9 FUNCTION switch to LFO CAL position.
Set MC, 100KC, and LFO dials to channel frequency.
NOTE: 150MC band channels are direct reading.
450MC band channel frequencies must be
divided by 3.
Set LFO dial to nearest 5KC CAL point (yellow
calibration marks).
Adjust LFO CAL knob for zero beat, using speaker
and beat meter.
Turn FUNCTION switch to MEAS. GEN. position.
Reset LFO dial to 450MC channel divided by 3.
Ignore this step for 150MC 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 modulated
by applying a 0 to 1 vrms tone to the EXT. MOD
connector. А 1 vrms tone will cause БКС deviation
at 150MC or 15KC deviation at 450MC.
2-1.
722
SECTION 11
FIELD MAINTENANCE
GENERAL.
With limited field facilities, maintenance should
be limited to (1) 1 mc calibration, (2) calibration of the
LFO dial, and (3) adjustment of the battery charge circuit.
Refer to Section III for additional maintenance and check-
out 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 MC CALIBRATION.
2-5. To ensure accuracy, check calibration of the
1 mc crystal every 90 days.
To check and adjust the
crystal, either a primary 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
PCR-1 is required. To check and adjust the receiver,
proceed as follows:
a.
2-6.
2-7.
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.
Connect 1 MC OUTPUT jack J1606 to the comparison
(Fx) input of the standard or receiver.
Turn FM-9 power switch ON. The remaining
controls of the FM-9 do not affect the 1 mc output
‘signal.
Proceed with the frequency check.
Make certain that the crystal is accurate to one
part in 107" or better. Adjust MC ADJ capacitor
C1648 as required to obtain accuracy within limits.
LFO DIAL CALIBRATION.
During normal operation, the LFO dial is cali-
brated from the front panel with the LFO CALIBRATE
control.
If zero beats cannot be obtained at the low
or high ends, the dial should be recalibrated. A frequency
counter or some means of measuring frequencies in the
400 to 500 kc range is required. Reset the low and high
ends as follows:
a.
b.
i.
k.
Remove covers. See paragraph 2-3.
Turn power on and allow a 30 minute warmup.
Connect frequency measuring device to the LFO
OUTPUT jack J1605.
Set the LFO CALIBRATE control to the approximate
mid point.
Set the LFO dial to 000 (ccw).
Adjust coil L101 (see section 5) to set the LFO to
400 kc.
Set LFO dial to 000 (cw).
Adjust capacitor C1645 to set LFO to 500 kc. The
dual screwdriver controls for the capacitor are
accessible from the side of the unit.
Turn FUNCTION switch to LFO CAL.
Check that zero beat may be obtained with the LFO
CALIBRATE control.
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.
b.
Connect power cord to a vac outlet.
Slide 115/230 volt switch to position matching the
voltage of the power source.
Slide dc/ac switch to ac.
Turn POWER switch ON.
Turn BATTERY CHARGE switch to CHARGE.
Connect dc voltmeter to DC INPUT jack J1608.
Adjust potentiometer R913 (see section 13) to set
battery charge voltage to the maximum charge level.
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
'SHOP MAINTENANCE
3-1. GENERAL.
3-2. This section includes maintenance procedures
recommended for calibration laboratories or similarly
equipped facilities. The maintenance procedures consist
of checkout and adjustment procedures and troubleshooting
notes. Refer to paragraph 2-3 for cover removal.
3-3. ADJUSTMENTS.
3-4. FIELD CALIBRATION. Perform adjustment
procedures outlined in Section II before proceeding with
the adjustments listed below.
3-5. POWERSUPPLY. 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 capacitor
C907).
d. Adjust potentiometer R909 (see section 13) to set
voltage to 9 vdc.
e. If adjustment was required, repeat procedure of
paragraph 2-9.
3-6. DIVIDERS. То check Ше dividers, a frequency
counter is required. Proceed as follows:
a. Turn FUNCTION switch to LFO CAL.
b. Connect counter to TP11 (see figure 3-1).
c. Center coil 1701 in the range over which the divider
output is 100 kc.
d. Connect counter to TP10.
e. Center coil L702 т the range over which the divider
is 5 kc.
3-7. 17 TO 28 MC OSCILLATOR. То tune the oscillator,
a means for measuring signals in Ше 17 to 28 mc range 15
required. Exact frequency measurement is not required,
The measuring device need only distinguish between
1mc steps. To tune the oscillator, proceed as follows:
a. Connect dc voltmeter to TP12.
b. Connect frequency measuring device to TP3. Make
certain input impedance of device is 100 k or more.
c. Set the mc dial to 150 mc.
d. Check that oscillator frequency is 17 mc. If required
retune oscillator with trimmer capacitor .C1601.
e. Check that a steady dc voltage (indicating lock)
is measured at TP12 with the frequency measuring
device connected and disconnected.
f. Repeat procedure for the following dial settings:
MC OSCILLATOR TRIMMER
DIAL FREQUENCY CAPACITOR
150 17 mc C1601
151 18 mc C1602
152 19 mc C1603
153 20 mc C1604
154 21 mc C1605
155 22 mc C1606
156 23 mc C1607
157 24 mc C1608
158 25 mc C1609
159 26 mc C1610
160 27 mc C1611
161 28 mc (71612
3-8. 2.6 TO 3.5 MC OSCILLATOR. То tune the oscil-
lator, a means for measuring signals in the 2. 6 to 3.5
mc range is required. Exact frequency measurement
is not required. The measuring device need only
distinguish between 100 kc steps. То tune the oscillator
proceed as follows:
a. Connect dv voltmeter to TP6.
b. Connect frequency measuring device to TP5.
c. Set the 100 kc dial to 9.
d. Check that oscillator frequency is 3.5 mc. Е re-
quired, retune oscillator with trimmer capacitor
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 KC OSCILLATOR TRIMMER
DIAL FREQUENCY CAPACITOR
9 3.5 C1644
8 3.4 C1643
1 3.3 С1642
6 3.2 С1641
5 3.1 С1640
4 3.0 С1639
3 2.9 C1638
2 2.8 С1637
1 2: 1 С1636
0 2.6 С1635
3-9. 20 TO 32 MC AMPLIFIER. То tune Ше amplifier,
a means for measuring relative signal amplitudes in the
20 to 32 mc range is required. To tune the amplifier
proceed as follows:
3-1
a. Set LFO dials to 000 and 100 KC dial to 5.
b. Connect amplitude measuring device to TP2.
c. Set MC dial to 150 (150. 5000 mc).
d. Tune for maximum amplitude and trimmer capacitor
C1613.
e. Repeat procedure for the following dial settings:
DIAL TRIMMER
SETTINGS CAPACITOR
C1613
120. 2000 С1614
152. 5000 С1615
152. 5000 С1616
154. 5000 С1617
155. 5000 C1618
156. 5000 C1619
157.5000 C1620
158. 5000 C1621
159. 5000 C1622
160. 5000 C1623
161. 5000 C1624
3-10. 3 TO 4 MC AMPLIFIER. То tune the amplifier,
a means for measuring realtive signal amplitudes in the
3to 4 mc range is required. To tune the amplifier
proceed as follows:
a. Set the LFO dials to 500.
b. Connect amplitude measuring device to TP4.
c. Set 100 KC dial to 9.
d. Tune for maximum amplitude with trimmer capacitor
C1634.
e. Repeat procedure for the following dial settings:
100 KC TRIMMER
DIAL CAPACITOR
C1634
C1633
C1632
C1631
C1630
C1629
C1628
C1627
C1626
C1625
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3-11. DEVIATION METER ZERO SET. То set the
circuit to a center frequency of 300 kc, proceed as
follows:
a. Connect 300 KC signal to INPUT/OUTPUT Jack
J1601.
b. Turn FUNCTION switch to FREQ SET.
c. Adjust potentiometer R210 to obtain a zero indi-
cation on the meter.
3-2
3-12. 5 KC AND 15 KC DEVIATION METER CALI-
BRATION. То calibrate the meter, a signal with a
precisely known FM deviation is 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 KC.
c. Apply a deviation of 5 kc to the incoming signal.
d. Adjust potentiometer R226 to obtain a 5 kc indication
on the meter.
e. Turn DEVIATION switch to alternate position and
check meter indication. If required, adjust ро-
tentiometer R236 for a compromise setting.
f. Turn FUNCTION switch to 15 KC.
в. Apply a deviation of 15 kc to the incoming signal.
h. Adjust potentiometer R224 to obtain a 15 kc indi-
cation on the meter.
i. Turn DEVIATION switch to alternate position and
check meter indication. If required, adjust ро-
tentiometer R236 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. То 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 and 9 vdc per
paragraph 3-5.
1. Failure to obtain required output voltages:
indicates troubles in the regulator circuit.
3-16. 1 MC CIRCUITS.
a. Check 1 mc output per paragraph 2-5.
1. Erratic or inaccurate output indicates troubles
in the crystal oscillator A1611, crystal CR1601,
or with the crystal oven circuit.
2. Ко output indicates troubles in the crystal
oscillator A1611 or the spike generator A1608.
| b. Check divider output per paragraph 3-6.
1. Erratic 100 kc output indicates troubles in the
buffer 9701 or the 10:1 divider.
2. Erratic 5 kc output indicates troubles in the
20:1 divider.
3-17. LFO.
а. Check LFO end points per paragraph 2-7, steps
a through g.
1. Erratic output indicates troubles in the LFO
A1615.
2. No output indicates troubles in the LFO or
buffer Q303.
b. 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. Lack of beat note control indicates troubles
in the LFO.
3-18. 1"7 TO 28 MC OSCILLATOR.
a. Check tuning of oscillator per paragraph 3-7.
1. No output at TP3 indicates troubles in oscillator
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.
2-19. 2.6 TO 3.5 MC OSCILLATOR.
a. Check tuning of oscillator per paragraph 3-8.
1. No output at TP4 indicates troubles in oscillator :
Q1504.
2. A varying dc output at TP6 indicates loss of
lock. The trouble is probably in blocking
oscillator Q1502 or the phase detector.
3-20. IF CHECK.
a. With a frequency measuring device, check that
output at TP1 is between 20 and 32 mc.
1. An output varying in frequency within the 20
to 32 mc range indicates loss of lock. Proceed
with the checkout procedure.
2. No output in the range indicates troubles in the
multiplier circuits, HFO Q1004 or mixer Q1003.
b. Tune 20 to 32 mc amplifier per paragraph 3-9.
1. No output indicates troubles in amplifier Q1404.
c. Tune3 to 4 mc amplifier per paragraph 3-10.
1. No output indicates troubles in mixer Q1501
or amplifier Q1503.
d. With a frequency measuring device, check that
output at TP7 is between 400 and 500 kc.
1. No output indicates troubles in mixer-amplifier
А1613.
е. Check dc voltage at TP8.
1. A varying dc voltage indicates troubles in phase
detector A1614 or the HFO Q1004.
3-21. OUTPUT CHECK.
a. 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.
b. Measure output at J1601 as the RF OUTPUT and
% RF OUTPUT controls are varied.
1. No output indicates troubles in the attenuator.
2. Lack of control indicates troubles in the atten-
uator or buffer Q1002.
3-22. DEVIATION METER CHECKS.
a. Operate equipment per steps 1, 2, and 3 of the
transmitter deviation check section of table 2.
1. На limiter current reading above the red line
cannot be obtained, the trouble is probably in
the IF amplifiers Q501 and Q502 or limiter
Q503 and Q504.
b. Check zero set per paragraph 3-11.
1. Inability to obtain a zero set indicates troubles
in the limiter or the discriminator.
c. 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
N
а
ра
ТР6
ТР5
TP3
TP4
Test Points (Sheet 1 of 2)
Figure 3-1.
3-4
o
6
эзе
е: е
8.8. ТР7
ШРШ о. °
eso
e e
ее:
ее
TP10 o e 159
e €
TP8
Figure 3-1. Test Points (Sheet 2 of 2)
3-5/3-6
Vi / 8 | И Е 187 Т” | 1 / | БА й
SC | АР ий 27 та " I
Peu Un
7 | | |
1 ТАИ
PF. | ^
Ex Ма ] 6
SECTION ІҮ
MAIN CHASSIS COMPONENTS
(See figures 4-2 through 4-7)
ITEM
DESIG PART NO.
A1605
Board Assy, IF Amplifier and limiter (See Section IX) АА -1127
Board Assy, Discriminator and meter (See Section VI) АА -1128
Board Assy, High frequency oscillator (See Section XIV) АА 1129
Board Assy, 1 MC multiplier (See Section XVI) АА -1130
Board Assy, Audio (See Section XV) АА-1131
Singer
NO.
Board Аззу, 1 MC spike generator (See Section X) АА - 3
Board Assy, Power supply (See Section XIII) АА -1134 | שמ
Board Assy, Crystal oscillator (See Section XII) АА -1136
Board Assy, Frequency dividers (See Section XI) AA -1137
Board Assy, 400 to 500 KC IF (See Section XVII) ГАТА За
Board Assy, Phase detector and sweep ра е (See АА -9
Section VIII)
Board Assy, Low frequency oscillator (See Section V ) АА -1140
Board Assy, 3 cycle sweep and LFO buffer (See AA -1141
Section VII)
A1612
A1613
A1614
A1615
A1610 Board Assy, 100 KC selector (See Section XIX) АА-1135
Capacitor, trimmer, 3 to 35 pf 403 Elmenco
ша
Capacitor, trimmer
Capacitor, trimmer
Capacitor, variable, 17 to 360 pf QUAS
C1647 4-5 Capacitor, trimmer, 1.5 to 5.0 pf 160-102
ITEM PART NO. МЕК
Capacitor, dual trimmer, 5 to 25 pf 3153-000-NPO Erie
D
Capacitor, variable, 0.6 to 14 pf
F
EM
4-6 Capacitor, mica, 120 pf DM15E121J
|4-6 Capacitor, mica, 82 pf DM15E820J
4-6 Capacitor, mica, 82 pf DM15E820J
4-6 Capacitor, mica, 68 pf DM15E680J
4-6 Capacitor, mica, 47 pf DM15E470J
4-6 Capacitor, mica, 43 pf DM15E430J
4-6 Capacitor, mica, 27 pf DM15E270J
^ш
E
ELO
E
ETE
БЕРЕ.
s
EX =
e a
ET.
Ко
ET
EM
Capacitor, mica, 150 pf
©1650 4-6 Capacitor, mica, 15 pf DM15E150J
C1658 4-6 Capacitor, mica, 10 pf | DM15E100J
C1659 4-7 Capacitor, mica, 33 pf | DM15E330J
C1660 Capacitor, mica, 27 pf DM15E270J
C1662 Capacitor, mica, 15 pf DM15E150J
eo тэ 0023
me ЕН remm ה
be
E
Part of FL1601
4-4 Capacitor, electrolytic, 100 uf, 15 V P65AN2410015
C1667 Capacitor, electrolytic, 25 uf, 15 V Р65АС122515
CR1601 Crystal Assembly, | MC, 12 vdc oven TCO-11R0-4 Bliley
СК 1603 Diode, Zener 9 V 1N1511A 223822
Е1601 Fuse, 0.25 amp мог -1/4
Bussmann
FL1601 4-4 Filter АА -1125
J1601 4-2 Connector, BNC 2230-7
= + зу (sw)
81601 81620
ж алк
DISCRIMINATOR OUTPUT
A 602 -
| IF AMPLIFIER.
LIMITER
IF AMPLIFIERS AND LIMITER
1
+ зув
41604, 21603
= `
DEVIATION
DISCRIMINATOR AND
METER DRIVE
| SCRIMINATOR. BUFFER
09201,0202 9203
IF AMPLIFIER
270КС Le 330 КС
| 050 0502 96503,0004
-
AMPLIFIER »
51605
DETECTOR
Q 204 DRIVER
15 KC D?
FEEDBACK FEEDBACK
[=
Ë = з
4
+ зув $!
(звнв
чон FRED OSCILLATOR
E
НЕО HIGH FREQUE!
OSCILLATO/
BUFFERS
TIMES 2
| DETECTOR
Loes | I MC MULTPLIER
FUNCTION
PRE AMPLIFIER|
оно, 9102
TWIN TEE
NOTCH FILTER
1. 3 PROGRESSIVELY SHORTING CONTACTS,
2. UNLESS OTHERWISE SPECIFIED RESISTOR
VALUES ARE IN OHMS 510% 1/4 WATT.
3. UNLESS OTHERWISE SPECIFIED CAPACITOR
VALUES LESS THAN ONE АНЕ IN MICRO-
FARADS, THOSE MORE THAN ONE ARE IN
PICOFARADS.
TP 2 оф
202221
20-32 MC
AMPLIFIER
91404
(мс
SELECTOR
Ce се
MIXER | | BUFFER
R 20-32 MC MULTIPLIER AMPLIFIER MULTIPLIER
130 MC | | 65 MC 65 MC
BUFFER TIMES Із |
AMPLIFIER MULTIPLIER
13 MC 13 MC |
FUNCTION
CAP VALUE 1.5—20pf i2 PLACES (CI6I3— C1624)
cigs 6
gt
6 PLACE:
скоз Ci
TAR VALUE 15-204 — PLACES (0607 св
7 8 6
AG
LF =L
sL
LUE 3 T
490608696126
eal 7 Де 147l Да
C1649 | CI6507 ciesi | 0652 [07653 T cies | cie55 [ 6
4 5 6 ד
2 5
МС SELECTOR
دهاع ار
1609 СО сви 6
a
= |
d |
сі657 $ 1658
в 9 ю и !
BLOCKING
OSCILLATOR
1 2 3 4 5
Я 1604 98 1605 98 1606 7 61607 9RI608 981609
RES. VALUE 270 11 PLACES (RI6O4 -RIGI4)
BATTERY
CHARGE
5 1606.
ТМС SPIKE A1908
ВА! 1
BUFFER | 1
9605
1т-гвмс
OSCILLATOR
Q 1403
SHAPER
ома ,2
1 AMPLIFIER
MODULATION
MC ADJUST
АВИ
22
ТРЗ
те 4 o
3-4 MC
AMPLIFIER
01503
-о ТР I2
96 o ов o9
1632 3
26 TO35MC
OSCILLATOR
0 1504
DETECTOR
ci (1634
7 в 9
ci648
5 томыг
OPERATE
BATTERY CHARGE
FUNCTION.
5 1602 А
зүв
400-500 КС
AMPLIFIER
91302
2х(5Т025)
3 CYCLE
SWEEP АМО
LFO BUFFER
LOCKED NORMAI
Gei
СТ:
SE DETECTOR 8 SWEEP GATI
LOW FREQ OSCILLATOR:
LFO BUFFER
9 з03
RI6I6
2.2K
| CRYSTAL
VBA/ 230У
Lo 2
| wisor
THERMOSTAT
CRYSTAL OVEN
Figure 4-1. Interconnection Diagram
Jack, red 108-902 E.F. Johnson
108-903 E.F. Johnson
Jack, black
108-903
Jack, black
E.F. Johnson
Jack, red 108-902
Choke, 1.8 uh (Part of FL1601) 2-144
Speaker, 100 ohm coil 22А 062,100
Connector, phono
Connector, receptacle
Choke, 3,9 uh (Part of FL1601)
Choke, 3.9 uh (Part of FL1601)
2N1485
Potentiometer, 5K JU5021 Allen-Bradley
JU1021 Allen-Bradley
Resistor, wirewound, 20 ohms +10%, 5 watt
Resistor, composition, 2.2K +10%, 1/2 watt
composition, 10K +10%, 1/4 watt
4.7% +10%, 1/4 watt
composition,
composition,
composition,
Singer
Switch, slide,
Switch, slide,
ХЕ 1601
ХЕ 1602
XDS1601
Switch, slide,
slide,
PART NO.
slide,
slide,
Fuseholder
Fuseholder
Lampholder
DialIndicator Assembly
LS1601
X RF QUIPDT
R1601
$1603
AT1601 R1603 051601
8607
MODEL FM. 3 :
REQUENCY/DEVIAHON. METER. : ie
QUY НА
TEL ES — ч לוה
18452: 53 [450488]
51606 2 5116095041605 151605
51604
Figure 4-2. Front Panel
M1601
UM. FREQ
Mts CUR. SET
אש е 06
* .
C1646
C1647
51602
31607
LOOLM
6091Г 9091Г 8/912 8091Г 20914 60915 5
[0914
WASON А ©
01915 VOILE
2
А
2091Г
Back Panel
Figure 4-3.
4-6
A1611 FL1601 А1608 СК1603 К1615 Cl666
К1618
К1616
К1617
CR1602
С1667
Q1601
o e
КС
А1612
А1602 А1614
Figure 4-4, Тор Chassis View
T1601
A1609
A1601
R1602
R1619
R1620
CR1601
Figure 4-5, Bottom Chassis View
A1613
A1606
C1624
R1621
С1640
Figure 4-6. Tuning Capacitors
C1639
C1642
C1637
С1643
.C 1635
С1644
С1636
С1641
С1638
4-9
С1611
С1612
С1634
Figure 4-7.
le
е
@
е;
а:
e:
9
e:
м
5
6 e€ Ze
Tuning Capacitors
OE SV
400-500 KC
OUTPUT TO
BUFFER AMPL-
Cle46 С1647
2X(5-25)
L — MAIN £ — CALIBRATION
TUNING CONTROL
TO MAIN 17-360 5-5
+ LOCK PHASE
= DETECTOR
TO LOCKED
NORMAL SWITCH
NOTES:
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE ІМ OHMS + |0% 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)
RIOS ןסו 6104 RIO9 C101
1101--- 2
A Q101
R106 ДЕ
R108 C107
C105 R104
C106
61020708 R107 0102
Figure 5-2, Component Location (Low Frequency Oscillator)
SECTION V
5-1
REF
DESIG ITEM
C101 Capacitor, mylar, 25 uf, 15 vdc
C102 Capacitor, ceramic disc, 0.01 uf
C103 Capacitor, ceramic disc, 0.01 uf
C104 Capacitor, ceramic disc, 0.01 uf
C105 Capacitor, ceramic disc, 0.01 uf
C106 Capacitor, mica, 390 pf
C107 Capacitor, mylar, 0.022 uf, 200 vdc
C108 Capacitor, 100 pf
ТЕЛО Choke, 160 uh
Q101 Transistor
Q102 Transistor
R101 Resistor, composition, 33K %10%, 1/4 watt
R102 Resistor, composition, 10K +10%, 1/4 watt
R103
R104 Resistor, composition, 100 ohms +10%, 1/4 watt
R105 Resistor, composition, 1K +10%, 1/4 watt
R106 Resistor, composition, 470 ohms +10%, 1/4 watt
Resistor, composition, 2.2K +10%, 1/4 watt
REOT Resistor, composition, 15K %10%, 1/4 watt
R108
R109
9-1. The low frequency oscillator is a multivibrator type
of oscillator with a tuned LC network in the base of the
second stage Q102. Four controls tune the LC network:
a. LFO SELECTOR capacitor C1646 which functions
as the main tuning control.
b. CALIBRATION control capacitor C1647 which sets
the circuit to the 5KC calibration points.
c. High and low dial tracking controls capacitor C1645
and coil L101.
5-2
Resistor, composition, 4.7К +10%, 1/4 watt
,Resistor, composition, 150 ohms %10%, 1/4 watt
5-2.
2658612255 | MEG |
851Z5U103Z
85125171032,
851250 1057
8517501032
DM15E391J
192222392
TYPICAL VOLTAGES.
The 400 to 500 KC output to the buffer amplifier
(measured at C104) should be approximately 1.5
volts peak-to-peak.
The signal tothe main lock phase detector (meas-
ured at the junction of C106 and C107) should be
approximately 0.1 volt peak-to-peak.
C206 CR202 CR204 C209 R211 R210
+9 v (SW)
—— --- 一 я = SCOPE
+9VISW) OUTPUT
R20!
220 DISCRIMINATOR TO POINT "A"
Q203 R213 6216 LIMITER
K 10
!
r R234 да
= = 24
І 4 a а
> L201! R203 C201 C202 53 R204 o L202 5
5 אסו 220 01. 270 אסו 5
5у
1
22
TO DET. ON
3! AUDIO AMPL.
= I BOARD
Е 516020
3
DETECTOR DRIVE Je DETECTOR 9228 TO BATTERY
2
AAA. 3
506
с217 -
l сгов Б 109 Мғо/15У eum Z и T KJ -
с204 свео R205 |Ф R206 свгоз caos ° TO = "b i=
56 20 22K 22К БӨЗ || הכ | ces i EE die cd л у узо у == 4 C202 1 R213
» D R230 Үр эх BATERY 5 >
dem. 2 20808 ₪ CHG.SW. R201 Ze Ë R233
- E
C210 E» e
+T 100 100 | 1203-Ж و >
МЕО |—MFD = ¥ ома ,
SWITCH 4
5 51602 |
C211
с216 |
50 MFD/ 15У
DEVIATION
AUDIO OUTPUT
0206 5К C207
0201 330 330
CL ES WCR204
x R207
470
| o FREQ. SET
| METER ADJ. i R212
|
=
]> cu
+ 1258
.p 9100191 МУСА
| * . m
То
KR S S Ss 7, 2 "25 2 1. гё #==——— 4
1. ALL TRANSISTORS ARE ТҮРЕ МЕ 217.
2. ALL DIODES ARE TYPE IN273. |
3- UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS +10% 1/4 WATT.
4. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICRO-
5. FUNCTION SWITCH; FARADS, THOSE MORE THAN ONE ARE IN РІСО-
FARADS.
[ | Голоса |
a =
Гэ имтев — ]
[ + | METER зево |
[^s ]: те |
[ e [в |
Figure 6-2. Component Location (Discriminator)
SECTION VI
6-1
Figure 6-1. Schematic (Discriminator)
REF
DESIG ITEM PART NO. MFR
C205
Capacitor, mica, 270 pf
Capacitor, ceramic disc, 0.01 uf
Capacitor, mica, 220 pf
DM15E271J
Elmenco
851Z5U103Z
Capacitor, mica, 56 pf
Capacitor, mica, 56 pf
DMI5E221J
Elmenco
DM15E560J Elmenco
15Е 5601 אס
Elmenco
C206
C207
Capacitor, mica, 330 pf
DM15E331J
Elmenco
C208
C209
C210
Capacitor, mica, 330 pf DM15E331J Elmenco
Capacitor, mica, 100 pf א 1 1 Elmenco
Capacitor, mylar, 0.1 uf C280AA/P100K Amperex
Capacitor, plastic, 0.5 uf 1143 Jedco
Capacitor, electrolytic, 6.8 uf, 15 V Р65АС06815 МЕС
Capacitor, mica, 75 pf DM15E750J
Capacitor, mica, 130 pf DM15E131J
Capacitor, electrolytic, 10 uf, 15 V Р65АС101015 МЕС
Capacitor, electrolytic, 100 uf, 15 V P65AN1610015 MEC
Capacitor, electrolytic, 50 uf, 15 V P65AK125015 MEC
Capacitor, electrolytic, 100 uf, 15 V Р65АМ1610015 МЕС
Diode 1N273
Choke 387-1300 Wells
Choke 387-1300 Wells
T
Choke, 2.5 mh 1 Miller
Transistor ME217 Amperex
Resistor, composition, 220 ohms +10%, 1/4 watt
Resistor, composition, 12K 51096, 1/4 watt
Resistor, composition, 10K «10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 470 ohms %10%, 1/4 watt
Resistor, composition, 2.2K %10%, 1/4 watt
Resistor, composition, 2.2K +10%, 1/4 watt
DESIG ITEM PART NO. МЕК
R210 Resistor, variable, ІК
R211 Resistor, composition, 2.2K +10%, 1/4 watt ww
gsm зи as
R213 Resistor, composition, 2.2K %10%, 1/4 watt | ייר РА
R214 Resistor, composition, 2.2K +107, 1/4 watt nd
R215 Resistor, composition, 4.7K +10%, 1/4 watt | G
R216 Resistor, composition, 10 ohms %10%, 1/4 watt нЕ
В217 Resistor, composition, 10 ohms +10%, 1/4 watt |- PPP
R218 Resistor, composition, 100 ohms +10%, 1/4 watt
R219 Resistor, composition, 47K %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 +10%, 1/4 watt
R223 Resistor, composition, 22K %10%, 1/4 watt Биж
R224 Resistor, variable, 25K
R225 Resistor, variable, 68К+10%, 1/4 watt ERI Е
R226 Resistor, variable, 50K
R227 Resistor, composition, 1.8K +10%, 1/4 watt UIS
R228 Resistor, composition, 100 ohms %10%, 1/4 watt mum
R229 Resistor, composition, ІК +10%, 1/4 watt Es
R230 Resistor, composition, 12K 10%, 1/4 watt асам
R231 Resistor, composition, 4.7K +10%, 1/4 watt ШЕН SS
Resistor, composition, 15K 4100, 1/4 watt aa עו
R233 Resistor, composition, 150K +10%, 1/4 watt יא ја
R234 Resistor, composition, 10 ohms %10%, 1/4 watt ===
R235 Resistor, variable, 5K MTC-1-5K
R236 Resistor, variable, 10K MTC-1-10K
6-1. The discriminator receives a signal from amplifier
and limiter A1602 and delivers a dc voltage to the meter
with an amplitude determined by frequency deviation.
The unit also delivers demodulated audio to the discrim-
inator output (Scope) jack and to the head phone jack.
6-2. The input signalis appliedto the two sides of the
discriminator through transistors Q201 and Q202. The
low side Q201 is tuned to 270KC and the high side Q202
is tuned to 330KC. Тһе outputs of the two transistors
are applied to peak-to-peak detectors (CR201, CR202,
CR203, CR204). Тһе rectifier circuit is referenced
to a dc level by potentiometer R210.
6-3. Atthe center frequency fo 300KC, the signals
developed by thetwo 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. Тһе amplitude
of audio signal is determined by the amount of devia-
tion from the center frequency. The audio output is
delivered tothe audio circuits through emitter follower
Q203. Тһе audio signal is delivered to the discrimi-
nator output jacks J1603 and J1604 through resistor
R233.
6-4. А Шгее stage audio amplifier consisting of tran-
sistors Q204, Q205, and Q206 is used to drive the
voltmeter circuits. Direct coupling is used between
stages and degenerativefeedback stabilizes gain. The
voltmeter circuit is calibrated by setting the gain
through the amplifier. Potentiometer R226 calibrates
the meter for a full scale indication of 5KC and poten-
tiometer R224 calibrates the meter for 15KC.
6-5. Twopeak 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
E u
ZI AW p
en 20. толеу |
ba ы: 2 VA 127 А
SEN о
Жарқ Bán >
СЕТУ: MIND Vu
WU Пада о Opp % |
ID
cái ER UM JEEP
їл ert ged, i ? di аж qui 34 А
Ме ES TTL i, | RENT Sid wt ЈЕ
И שש | א 4d à 606 | Џ
а 9 IU ИГ
Г 1 ^ mr 6 »
! у TI וו M
OUTPUT TOLFO
OUTPUT
SWEEP GENERATOR
Фа L.F.O. BUFFER AMPLIFIER
+ סצפ
R30I R302 азо!
39K 39K МЕ217 СГ)
3...
TO LFO "CAL"
BEAT DETECTOR
EXTERNAL
LFO OUTPUT
R304
18K
1MFD 1 MFD
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 К314 R307 Q302 C304 C301 R301 Q301
E C302
Q303
R311 C303
R310 R302
C305 R303
R309 C306 R305 R308 R306 R304
Figure 7-2. Component Location (Sweep Generator and Buffer)
SECTION VII
1-1
C302 Capacitor, electrolytic, 5 uf, 15 vdc P65AG-10515
C303 Capacitor, electrolytic, 1 uf, 15 vdc P65AG-10115
C304 Capacitor, electrolytic, 10 uf, 15 vdc P65AG-101015
C305 Capacitor, mylar, 0.1 uf C280AA/P100K
DESIG ITEM PART NO,
C
R303 Resistor, composition, 10K +10%, 1/4 watt pL:
R304 Resistor, composition, 18K +10%, 1/4 watt
R305 Resistor, composition, 6.8K +10%, 1/4 watt
R306 Resistor, composition, 10 ohms +10%, 1/4 watt
R307 _ Resistor, composition, 3.3K +10%, 1/4 watt
R308 Resistor, composition, 22K +10%, 1/4 watt
R309 Resistor, composition, 2.2K +10%, 1/4 watt
R310 Resistor, composition, 22K +10%, 1/4 watt
R311 Resistor, composition, 22K +10%, 1/4 watt
R312 Resistor, composition, 4.7K +10%, 1/4 watt
RNS Resistor, composition, ІК +10%, 1/4 watt
R314 Resistor, composition, ІК +10%, 1/4 watt
סל
₪
Hj
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.
1-2
PHASE DETECTOR (MAIN LOCK)
EN рина ct9v
Cap
1 3
1 400-500КС
О үр INPUT
= TEST POINT
ТРТ
| fpe
Ay -ОТО LOCK LINE
R401 R405 =
10K ік CR402 R408 ваю CR 403 TEST POINT
LFO או 3 47K 47K IN273 Е R417 ТР 8
INPUT de Kl Kit 10K
: C402
= et C404 C405 C406 1
9401 330 100 330 у چ |
ME2I7 CR 401 call
IN273 .022MFD
1 вав
1 „ак
R402 1
2.2K L
ван R419
470 ІК
D
SWEEP GATE at
צפ+ = -
с403
3 CYCLE 5MFD/I5V
INPUT
PU TEST POINT NOTES:
ТРЭ |. UNLESS OTHERWISE SPECIFIEO RESISTOR
VALUES ARE IN OHMS + סו % 1/4 WATT.
2. UNLESS OTHERWISE SPECIFIED CAPACITOR
400-500КС VALUES LESS THAN ONE ARE IN MICRO-
INPUT FARADS , THOSE MORE THAN ONE ARE IN
GATE CONTROL PICOFARADS.
ы
- Ж INDICATES FACTORY SELECTED COMPONENT.
NOMINAL VALUE SHOWN.
!
TO TRACKING
BIAS
Figure 8-1. Schematic (Phase Detector and Sweep Gate)
C410 R412 C407 C409
TP7 R419 C411 Q404 R418 |R417 / TP? / Q405 CR403
TP8
R406 CR404
R410
C401 C406
C405
Q402
R404
R411
R403 C404
R414
R408
R416
CR401
C408 R413 R407 R401 / 8402 | R405 | C402 CR402
Q403 C403 R409 R415 Q401
Figure 8-2. Component Location (Phase Detector and Sweep Gate)
SECTION VIII
8-1
PART NO.
REF
DESIG ITEM PART NO. МЕК
C402 Capacitor, ceramic disc, 0,01 uf 851Z5U103Z
C403 Р65АС10515 МЕС
Resistor, composition, 22K %10%, 1/4 watt
Resistor, composition, 2.2K %10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Capacitor, 5 uf, 15 vdc
DM15E331J Elmenco
8512501032 Erie
C404 Capacitor, mica, 330 pf Resistor, composition, 47K %10%, 1/4 watt
C405 Capacitor, mica, 100 pf Resistor, composition, ІК +10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
R417 Resistor, composition, 10К %10%, 1/4 watt |n — t "oe"
C406 Capacitor, mica, 330 pf
C407 Capacitor, ceramic disc, 0.01 uf
C408 Capacitor, ceramic disc, 0.01 uf 851Z5U103Z Erie В418 Resistor, composition, 1.8K %10%, 1/4 watt
MTC-1-1K
C409 Capacitor, ceramic disc, 0.01 uf 851Z5U103Z Erie Resistor, variable, ІК Mallory
119437-H Ucinite
119437-H Ucinite
C410 Capacitor, electrolytic, 10 uf, 15 V Р65АС101015 Test Point
192P22392
C411 Test Point
Capacitor, electrolytic, .022 uf, 200 vdc
CR401 1N273 Test Point
CR402
CR403
CR404 Diode
ME217
Q401 Amperex
Transistor
ME217
Q402 Amperex
Transistor
0403 ME217
Q405 Transistor ME217
Amperex
Amperex
Transistor
Figure 8-3. Phase Detector Waveforms
R401 Resistor, composition, 10K %10%, 1/4 watt
8-1. The phase detector receives a 400 to 500 KC
| signal from the 400 to 500 KC IF and from the low
| Írequency oscillator. The two signals are compared
and deliver a dc tuning voltage to the high frequency
oscillator. To assist in locating locks, three additional
inputs are supplied through the sweep gate.
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 dc output level
will change. This change in dc level results in a retuning
of the HFO.
R402 Resistor, composition, 2.2K 410%, 1/4 watt
R403 Resistor, composition, 27K +10%, 1/4 watt
R404 Resistor, composition, 10K +10%, 1/4 watt
R405 Resistor, composition, 1K +10%, 1/4 watt
8-2. The LFO signal is applied directly to the diode
R406
Resistor, composition, 270 ohms %10%, 1/4 watt
|
R407
R408
R409
R410
8-2
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 47K +10%, 1/4 watt
Resistor, variable, 500 ohms
Resistor, composition, 47K +10%, 1/4 watt
MTC-4-500 Mallory
circuit through Q401. As a result of the common col-
lector circuit, the signal applied through Q405 to the
other side of the diode circuit isinverted 180°. Diodes
CR402 and CR403 form peak-to-peak detectors, simi-
lar to the deviation meter discriminator (see Section 6).
De filtering is provided by resistors R408 апа R410and
capacitors C404, C405, and C406. The rectifier is
referenced to a dc level by the sweep gate circuit.
8-3. The 400 to 500 KC from the IF amplifier A1613 is
applied to the phase detector through emitter-follower
Q403. Тһе dc output level of the phase detector is
8-4. To assist the phase detector in locating a lock,
а tracking bias voltage is applied as а dc reference
voltage through 0404. Тһе voltage is supplied from
divider network R1604 through #1614.
8-5. To further assist in locating locks, a three cycle
sweep voltage is also applied through transistor 0404.
When lock is achieved, the IF signal into the phase
detector will be between 400 and 500 KC. IF detector
Q1304 will develop a dc output large enough to allow
Q402 to conduct. When Q402 conducts, the three cycle
Sweep voltage is effectively eliminated.
0+ צ9 (SW)
1
С514
ТО DISCRIMINATOR
6516 =
ТО HFO BEAT
DETECTOR
NOTES:
1. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS + 10 % 1/4 МАТТ. |
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICROFARADS,
THOSE MORE THAN ONE ARE IN PICOFARADS.
TO FUNCTION
SWITCH
Figure 9-1. Schematic (300KC Amplifier and Limiter)
Q501 R501 C503 C502
x: ажи жин! 4
C501
R502 CR504
R503
R504 CR503
L501 R505
C504 R518
R506
CR502 C513
R508 CR501
R507
Q502 R521
R510 C511
R511
C507 R516
C514
R509 R515
R512 SCH
C508 R513
Q504
1502 |
5 AN R517
C505 C509 R514 C510 Q503
Figure 9-2. Component Location (300KC Amplifier and Limiter)
SECTION IX
9-1
PART NO. MFR
| | س [meno | אא |
DESIG ITEM PART NO. МЕК
Capacitor, ceramic disc, 0.01 uf
Capacitor, mylar, 0.1 uf C280AA/P100K | Amperex
Capacitor, mylar, 0.1 uf C280AA/P100K | Amperex
Capacitor, mica, 360 pf DMI5E361J Elmenco
Capacitor, mylar, 0.1 uf C280AA/P100K | Amperex
Capacitor, mica, 1000 pf DM15E102J
Capacitor, mica, 220 pf ГМ15Е2217
Capacitor, mica, 220 pf DMI15E221J
Resistor, composition, 33K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 100K +10%, 1/4 watt
Resistor, composition, ІК %10%, 1/4 watt
Resistor, composition, 100 ohms 4109, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 150 ohms +10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Capacitor, mylar, 0.1 uf C280AA/P100K | Amperex Resistor, composition, 1.5K +10%, 1/4 watt
Capacitor, ceramic disc, 0.001 uf 861Z5U102Z Erie
Capacitor, mica, 24 pf DM15E240J Elmenco
Capacitor, ceramic disc, 0.01 uf 851Z5U.01
851Z5U.01
Resistor, variable, 10K
Resistor, composition, 27K +10%, 1/4 watt
Resistór, composition, 270 ohms +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
9-1. When the instrument is set up for deviation meter 9-3. TYPICAL VOLTAGES. With the unit adjusted
operation, the amplifier and limiter receives a signal as a deviation meter and the limiter current set tothe
| with a 300 KC center frequency from the beat detector. red line, the following are typical voltages:
387-1300 The unit delivers an amplified andlimited signalto the
Electronics discriminator. a. 200 mv peak-to-peak measured at the collector
of Q501.
224-4200 Seel RE, 9-2. The two amplifiers Q501 and Q502 are stagger
tuned (L501 tuned to 270 KC and L502 to 330 KC) to
provide broad band amplification of afrequency 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
the input level to the limiter.
b. 4 v peak-to-peak measured at the collector of
Q502.
Transistor Amperex
с. 400 mv peak-to-peak measured at C514 (approxi-
mately square wave).
Transistor
Resistor, composition, 47K %10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
AMPLIFIER SHAPER BLOCKING OSCILLATOR BUFFER
+ о+9у
свот 5
R609 04 кво вви -Ol 100
IK 220 220 27
C606 1! |
| |
© =
Ë — 0605
IMC o 6
K - ME2I6 (p>
INPUT 2 (Ға,
- C605 Q604 а TO 13 MC HARMONIC
100 2М1742 6 | MULTIPLIER
2 3
! к 2.2K 330
Q603
ME2I7 (y סד I MC CALIBRATION
44 OUTPUT JACK
! 3 4
R602 R604 R605 R608 Teo <| | = 100
4.7K 100 IK IK 5 | | =
2 4 =
I 8 סד | MC HARMONIC
ae Y GENERATOR (17-28MC)
C602 R606 Se оле ЫЫЫ ги n
5 MFD 390
9 O EXTERNAL MODULATION
H XIV RMS
NOTES:
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES АВЕ 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 10-1. Schematic (Spike Generator)
R601 R605 Q601 R602
R603
C601
C603
R607
Q602
C605
R609
R610
C604
C606
R611
Q605
C607
R613 R615
; 0-2. t Location (Spike G t
Figure 1 Component Location (Spike Generator) SECTION X
10-1
REEF
DESIG ITEM PART КО. МЕК
C602 Capacitor, electrolytic, 5 uf, 15 vdc
C603 Capacitor, mica, 33 pf
C605 Capacitor, mica, 100 pf
R601 Resistor, composition, 27K +10%, 1/4 watt
R602 Resistor, composition, 4.7K +10%, 1/4 watt
R603 Resistor, composition, ІК +10%, 1/4 watt
ЖЕТЕ
em yc
[E
R604 Resistor, composition, 100 ohms +10%, 1/4 watt Желден
R605 Resistor, composition, 1K 4100, 1/4 watt nm
R606 Resistor, composition, 390 ohms %10%, 1/4 watt ННІ
R607 Resistor, composition, 15K %10%, 1/4 watt КАЙ
R608 Resistor, composition, ІК +10%, 1/4 watt ЕЖЕН
R609 Resistor, composition, ІК %10%, 1/4 watt CENE
R610 Resistor, composition, 220 ohms %10%, 1/4 watt НИЛ
R611 Resistor, composition, 27 ohms %10%, 1/4 watt КЕСЕРІ
R612 Resistor, composition, 2.2K 410%, 1/4 watt a
R613 Resistor, composition, 330 ohms +10%, 1/4 watt EN n
ЖЕГІ
ИШЕ
R614 Resistor, composition, 100 ohms +10%, 1/4 watt
R615 Resistor, composition, 100 ohms +10%, 1/4 watt
T601
10-2
10-1. The spike generator receives a 1 mc sine wave
signal from crystal oscillator assembly A1608 and
delivers 1 mc spikes to mc selector assembly A1607,
mc multiplier assembly A1605, and 1 MC OUTPUT
connector J1606. Audio from an external source is
converted to frequency modulation and applied through
the 130 mc 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 similar
to a multivibrator. The square wave output is converted
to spikes by the differentiator in the output circuit.
10-3. When audio is applied through the external modu-
lation connector, the audio functions as a variable bias
1 MC
IMC - 30CPS IMC + 30CPS
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 triggering time
affects the time between pulses and thus effectively the
pulse frequency. The amount of frequency 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 providea relatively constant deviation
regardless of the audio frequency, RC circuit (C602.
and R606) operates as a de-emphasis circuit.
10-4. The spike output of the shaper is applied to blocking
oscillator 9604. Тһе blocking oscillator provides output
pulses with sharp rise and fall characteristics. Тһе
output of the blocking oscillator is applied directly to the
mc selector and through buffer Q605 to the mc multiplier
and the output connector.
TRIGGER LEVEL
1 МС INPUT
WITHOUT AUDIO INPUT
OUTPUT SPIKES
WITHOUT AUDIO 1МРОТ
OUTPUT SPIKES
WITH AUDIO INPUT
TRIGGER LEVEL
1 MC INPUT
PLUS AUDIO INPUT
Figure 10-3. Modulation Circuit Waveforms
10-3
ШЕ 18 HHA
чп. à ES SN h
d - At /гїсїй Ч
LN
Ve " ^ D P (DN
TT ЯЛЫГ i Daa B 0
RT PORR vw | Ké x N |
ү 2 se М. 52 Г Ka мё: AM. У D 4
! שו D'A RK “ч | + a" Vi nor ep ығы
n ' ТА EIL | Gand pi | ыг " Ч Е 2 | ГҮ ש 2 12 | E әл
1 St, Ab E Ech 9 шэн
: 5: d ман SU n i T Ë Nee 6:
| А ч anan + "7 Wei m LE Wa хе:
E, а ТО гъ
СРЕЛЕ 29 А תי è мет с
г ў ^ - po" : Er ` раге - | | m i 1 E gin ем #
А M E
E |
4 .
L702 C706 C708 R715
BUFFER — סו (IOO KC) = 20 (5кс) TO 9V THROUGH
+ зу VAI e D WAAAY = LOCKED NORMAL
вто 8715 SWITCH
100 T igo
2 eme + + | с706 22 ШІК ЫН | 5703
T СВ 701
j зек мео [= —T 5MFD 47K 4 15 K |
TO LOCKED
- - эр > NORMAL SWITCH
C70! R712
100 33K TP 10
imc 0——34 La — wv — — TEST POINT
INPUT 1 C707
= וס. | ____ 5KC SPIKE
Q70! OUTPUT
МЕ217
стоз
100
1
1
R702 R703
4.7K 1K
- - - <` ا
ТРИ
TEST POINT
L— TO I00 KC
HARMONIC SELECTOR
NOTES:
1. 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.
3. Ж INDICATES NOMINAL VALUE.
C704 C703 0701
Figure 11-1. Schematic (Frequency Dividers) Figure 11-2. Component Location (Frequency Dividers)
SECTION XI
11-1
REF
DESIG
PART КО.
C701 Capacitor, mica, 100 pf
Capacitor, electrolytic, 5 uf
рМ15Е1017 Elmenco
Р65АС10515 МЕС
Capacitor, mica, 100 pf
mica, 1600 pf
Capacitor,
DMIS5EI101J Elmenco
DM19E1 62J
Capacitor, mica, 680 pf
——
DM15E681J Elmenco
Capacitor, electrolytic, 5 uf
P65A10515 MEC
Capacitor, ceramic disc, 0.01 uf 851Z5U103Z Erie
C708 Capacitor, plastic, 0.05 uf PVC215 Mallory
C709 Capacitor, ceramic disc, 0.01 uf 8512501032 Erie
C710 Capacitor, mica, 8200 pf DM30E822J Elmenco
C711 Capacitor, mica, 330 pf DM15E331J Elmenco |
CR701 Diode 1N273 |
L701 Coil 387-3000 Wells
Coil 387-40M Wells
L703 Coil, 2.5 uh 70F253AI Miller
0701 Transistor Amperex
Q702
thru Transistor МЕ216 Атпрегех
0705
В701 Resistor, composition, 39K +10%, 1/4 watt
R702 Resistor, composition, 4.7K +10%, 1/4 watt
R703 Resistor, composition, ІК +10%, 1/4 watt
R704 Resistor, composition, 47K %10%, 1/4 watt
В705 Resistor, composition, 15K %10%, 1/4 watt
R706 Resistor, composition, ІК £107» 1/4 watt
R707
R708 Resistor, composition, 15K %10%, 1/4 watt
Resistor, composition, 680 ohms +10%, 1/4 watt
R709
Resistor, composition, 4.7K +10%, 1/4 watt
R710 Resistor, composition, 100 ohms, %10%, 1/4 watt
Е711 Resistor, composition, 470 ohms +10%, 1/4 watt
-
1-2
Resistor, composition, 330 ohms %10%, 1/4 watt
DESIG ITEM PART NO. MFR
R712 Resistor, composition, 3.3% +10%, 1/4 watt Ш .
R713 Resistor, composition, 47K %10%, 1/4 watt НИ ل
R714 Resistor, composition, 15K +10%, 1/4 watt ЊЕ .
| R715 | Resistor, composition, 100 ohms +10%, 1/4 watt as. |
| R716 | Resistor, composition, 330 ohms +10%, 1/4 watt | | аз...
Bas |
|. ЖҰЗ
Resistor, composition, 15K +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Test Point
Ucinite
119437-H
Test Point
119437-H Ucinite
11-1. The frequency divider receives a 1 mc signal
from the crystal oscillator and delivers a 100 ke signal
to the 100 ke selector A1610 and a 5 ke signal to audio
A1606.
11-2. The 1 mc signal is applied through buffer Q701
tothe divide-by-ten circuit Q702 and 9703. Тһе divid-
eris a multivibrator tuned by coil 1,701 to be synchro-
nized when the tenth input sine wave is applied. The
divide-by-twenty circuit Q704 and Q705 is similar ex-
cept that the circuit is tuned by coil L702 to be syn-
chronized when the twentieth input sine wave isapplied.
11-3. TYPICAL VOLTAGES. With a 0.8 to 1.0 v
peak-to-peak input at C701, the following are typical
voltages:
a. Зу peak-to-peak measured at test point ТР11.
The waveform should be a partially-squared sine
wave.
b. 8 v peak-to-peak spikes (5 KC) measuredat TP10.
TO SPIKE
GENERATOR
TO IOO KC
DIVIDER
BUFFER | MC OSCILLATOR
+ 9V
C1648
6-14 pf
IMC E?
ти a |
L Фр
NOTES: 4 j
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS t IO % 1/4 WAT T.
2. 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 8803 C802 C801 С806
C808
R807
L801
C812
C804 R806
R804 Q802
Q801 C809
R808
R809
C805 C811
R801 R805 CR801 R802 C807
Figure 12-2. Component Location (Crystal Oscillator) SECTION XII
12-1
REF
DESIG ITEM
C801 Capacitor, mica, 0.0033 uf
C802 Capacitor, ceramic disc, 0.01 uf
C803 Capacitor, mica, 620 pf
C804 Capacitor, ceramic disc, 0.01 uf
C805 Capacitor, mylar, (Фо dle UE
C806
Capacitor, ceramic disc
C807 Capacitor, ceramic disc, 0.01 uf
C808 Capacitor, ceramic disc, 0.01 uf
C809 Capacitor, ceramic disc, 0.001 uf
C810 Capacitor, mica, 500 pf
C811 Capacitor, mica, 500 pf
C812 Capacitor, 68 pf
CR801 Diode
L801 Choke
Q801 Transistor
Q802 Transistor
R801
R802
R803
R804
R805
R806
R807
R808
R809
12-1. The crystal oscillator supplies a stable, accurate
1 mc signal to spike generator assembly A1608 and to
frequency divider assembly А1612.
12-2. The oscillator Q802 is a modified Pierce cir-
cuit designed for stable performance regardless of
supply voltage changes. The oscillator is isolated
from the load by buffer Q801. Тһе buffer supplies а
12-2
Resistor, composition, 470 ohms %10%, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 33K +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 220K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
PART NO,
Hj
20
ГМ19Е33217 Elmenco
85125U103Z Erie
Elmenco 717 1 אס
5517541087 Erie
С280АА/Р100К | Amperex
86 1 2 Erie
352 50 103 2 Erie
8512501032 Erie
861 2 Erie
DM15E501J Elmenco
DM15E501J Elmenco
TCZ-68 Centralab
1N273
387-60 Wells
ME216 Amperex
ME216 Amperex
rectified (CR801) AGC voltage to the oscillator through
resistors R802 and R809 and capacitor C807. The
buffer is tuned by coil L801.
to frequency by MC ADJ capacitor C1648.
12-3. The output of the crystal oscillator (measured
at C801) should be between 0.8 and 1.0 volts peak-to-
peak.
|
The crystal is adjusted
NOTES
|. UNLESS OTHEWISE SPECIFIED RESISTOR VALUES ARE IN
OHMS + IO % 1/4 WATT.
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS
THAN ONE ARE IN MICROFARADS, THOSE GREATER THAN
CRYSTAL OVEN
HEATER
THERMO-
STAT
о
Џ
=
ONE ARE IN PICOFARADS. 5 1606
BATTERY
|2 וו | ва јув | ла ја CHARGE
051601 -
+4
+ NAW |
8 5 |
330 20/5W OPERATE
Gase? 4 01601 BATTERY CHARGE
| 2N669 ЛУМ >o
7 81616 |
| _| 470 22K |
CR 1602 |
| A C1667 |
| Ї |
|
+ Ф
ЕВ + (UN REG) Ї | |
Лвов ШЕЕ sasi с1666
100 MFD /15V
гэ
+ 一 一
AC INPUT
и 1601 251 6 n
|
МАА ПБУ + | + +ду
МВА / 230V цай Арын |
2160! 1.5K 680 CR904 TO
6 o sc-2 FUNCTION
+ SWITCH
R905 Ribes г.
8.2K Le so [一
нәп ® 110)
270K FUNCTION
903 SWITCH
499 R914
264 50K
QUT CEOS Tes ed +
MI601
R909 0-50 pA
IK R912
| R 903 902 9 470 =
FLI60! ME 217.
1000 MFD/ 25V
115 / 230 |
R907 6
51608 או R913 FUNCTION
^ шин IK SWITCH
CR 902 6
sc-2 +! с904 |сеов | 0907 [+ R910 E
=] оомео | o IOOMFD T — IK
: 3 | 15 v 15у
d
R914 CR904 CR901
Q901 К903 CR902 R909
Figure 13-1. Schematic (Power Supply)
Figure 13-2. Component Location (Power Supply)
C906 C907 CR903 C904
C903
C902
R907
CR905
R904
R905
R912 R913 R908 C905 R910 Q902 R906 Q903
SECTION XIII
13-1
REF
DESIG
P65AR24100015
C903 8512501032
C904 Capacitor, electrolytic, 100 uf, 15 vdc Р65АК 1610015
C905 Capacitor, electrolytic, 10 uf, 15 vdc Р65АС101015 МЕС
C906 Capacitor, ceramic disc, 0.01 uf УБИЛА ОВА
C907 Capacitor, electrolytic, 100 uf, 15 vdc P65AN1610015
ITEM
C901 Capacitor, electrolytic, 1000 uf, 15 vdc
C902 Capacitor, electrolytic; 25 del
Capacitor, се םה ова эе 001 ае
СК901 Diode Bridge SB-2
CR903 Diode, Zener
о
о
Б
Semtech
ue ше
МЕ 217 Amperex
CR 904 Diode
CR905 Diode, Zener
Transistor
Q901
Transistor
0902
Transistor
0903
R901 Resistor, composition, 1.3 ohms +10%, 1 watt
R902 | Resistor, composition, 1К +10%, 1/4 watt
R903 Resistor, composition, 10 ohms %10%, 1/4 watt
R904 , Resistor, composition, 1.5K 41076, 1/4 watt
R905 Resistor, composition, 8.2K +10%, 1/4 watt
R906 Resistor, composition, 470 ohms 210%, 1/4 watt
R907 Resistor, composition, ІК +10%, 1/4 watt
R908 Resistor, composition, 680 ohms %10%, 1/4 watt
R909 Resistor, variable, ІК
МТС-4-ІК Mallory
MTC-4-1K Mallory
MTC-4-50K Mallory
R910 Resistor, composition, ІК +10%, 1/4 watt
R911 Resistor, composition, 270K +10%, 1/4 watt
R912 Resistor, composition, 470 ohms +10%, 1/4 watt
R913 Resistor, variable, 1K
R914 Resistor, variable, 50K
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 ас 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 9903. Potentiometer R909 sets the output
voltage to 9 vdc when the battery charge switch $1606
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.
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25
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BEAT DETECTOR HFO BUFFER
(AUDIO — 450 KC) (150-162 МС)
01003
T 2NI742,
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.001
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MIXER FREQ MULT
(20-32 MC) (130 MC)
RO 1019 слов
100 100 700
CR 1001
IN 914
Figure 14-1. Schematic (High Frequency Oscillator)
1.5КЖ 2.2K 5
i 1023 R1027 1
NOTES:
1, UNLESS OTHERWISE SPECIFIED RESISTOR VALUES
ARE IN OHMS + 10% 1/4 WATT.
2. COMPONENTS MARKED WITH Ж HAVE A FACTORY
SELECTED VALUE. NOMINAL VALUE SHOWN.
3. oUTPUT SWITCH:
+
. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES
LESS THAN ONE ARE IN MICROFARADS, THOSE
GREATER THAN ONE ARE IN PICOFARADS.
5. ЖЖ INDICATES LOCATION ON EARLIER MODELS.
CR1002
Жж #1007
ЖЖ C1006
CR1003
| C1006 91006 | С1022
C1005 T1001 01001 #1009 R1003 C1020 C1003
C1002
R1001
CR1001
wu ' h
Sa 2 \ WAN R1005
des | Л 11001
С1001
R1004
С1011 К1006
R1010 C1004
T1003 R1002
CR1004 R1018
L1002
C1012 R1011
R1022 ©1003
#1013 К1014
R1016 С1019
К1024
С1015
R1012
C1008 R1027
Q1004 R1023
R1017
C1017
R1025
R1019
R1026
С1018
С 1009
С1013
R1020
T1002 С1010 С1016 01005 С1014 R1021
Figure 14-2. Component Location (High Frequency Oscillator)
SECTION XIV
14-1
ES
DESIG PART NO. МЕК
וע
DMI5EI101J
DM15E101J Elmenco
Elmenco
Capacitor, mylar, 0.1 uf C280AA /P100K
Capacitor, ceramic disc, 0.001 uf 8612501022,
DMI15EI101J
C1015 | Capacitor, mylar, 0.1 uf
Erie
C280AA/P10K Amperex
am
Varicap
Capacitor, mica, 100 pf Elmenco
Capacitor, mica, 100 pf Elmenco
Capacitor, trimmer, 2 to 8 pf
Capacitor, mica, 100 pf
Capacitor, mica, 100 pf
Capacitor, mica, 100 pf рМ15Е1017
Capacitor, ceramic disc, 0.001 uf
Capacitor, ceramic disc, 0.001 uf
Capacitor, mica, 100 pf
Capacitor, 2.2 pf
Capacitor, ceramic disc, 0.001 uf
Capacitor, ceramic disc, 0.001 uf 861Z5U102Z
Capacitor, mylar, 0.01 uf
Capacitor, ceramic disc, 0.001 uf
C1021 Capacitor, mica, 100 pf
C1022 Capacitor, mica, 24 pf
C1023 Capacitor, ceramic disc, 0.001 uf
CR1001 Diode
1N914
CR1002 Diode
CR1003
Diode, capacitive reactance
CR1004 Sc2
Diode, capacitive reactance Varicap
Coil, 2.7 uh 70F276A1
Miller
Coil,
0.33 uh DDO-33 Nytronics
Transistor МЕ217
Атпрегех
14-2
hj
REF
DESIG ITEM PART NO.
2N1742
ELEM
Transistor
Transistor
5
E:
Transistor
Transistor
Transistor
Resistor, composition, ІК +10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
Resistor, composition, 47 ohms +10%, 1/4 watt
R1004 Resistor, composition, 1.8% +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 56K 4107, 1/4 watt
Resistor, composition, ІК %10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
Resistor, composition, 100К %10%, 1/4 watt
Resistor, composition, 10К %10%, 1/4 watt
Resistor, composition, 22K %10%, 1/4 watt
Resistor, composition, 4,7K %10%, 1/4 watt
Resistor, composition, ІК %10%, 1/4 watt
Resistor, composition, 470 ohms %10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
R1020 Resistor, composition, 47 ohms +10%, 1/4 watt
Resistor, composition, ІК %10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 1.5% £109, 1/4 watt
Resistor, composition, 22K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
Resistor, composition, 2,2K nominal value
14-1. The high frequency oscillator board receives а
65 mc signal from megacycle oscillator A1608 and a
dc tuning (lock) voltage from phase detector A1614.
The HFO produces the 150 to 162 mc standard signal.
14-2. The 65 mc signal is applied to multiplier Q1005.
The output circuit of the multiplier is tuned to the second
harmonic (130 mc) by transformer T1002. The 130 mc
output signal is applied to mixer 01003. Тһе 150 to
162 mc signal from HFO Q1004 is also applied to the
mixer. Тһе 20 to 32 mc difference frequency is applied
to mc selector A1607.
|14-3. The HFO Q1004 is a tuned collector oscillator
which uses voltage tunable, capacitive reactance diodes
CR1003 and CR1004 as the tuning elements. The lock
voltage from the phase detector is appliedto the diodes
REF
DESIG ITEM PART NO;
Resistor, composition, 150 ohms %10%, 1/4 watt
Resistor, composition, 6.8K +10%, 1/4 watt
Resistor, composition, 470 ohms %10%, 1/4 watt
Resistor, composition, 2.2K +10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
through a dc filter circuit. The output of the oscillator
is applied through butfer 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 generator, to the
output circuit through capacitor C1003 or to beat detector
Q1001 through capacitor C1002. Тһе beat detector is
designed for good response to low frequency beat notes.
14-5. Output level is set by the attenuator and by bias
control of buffer Q1002. Тһе 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.
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Figure 15-1. Schematic (Audio)
= о + (UNREG)
|
ТО EXTERNAL
DC INPUT
VOLUME
* CONTROL
PHONES
41602
NOTES:
1. ALL RESISTOR VALUES ARE IN OHMS t 10%
1/4 WATT UNLESS OTHERWISE SPECIFIED.
. FUNCTION SWITCH:
е
[ems]
=
| 4 | FREQ SET
го
5 КС DEV
| iskcoev | КС DEV
3. UNLESS OTHERWISE SPECIFIED CAPACITOR
VALUES LESS THAN ONE ARE IN MICRO-
FARADS, THOSE GREATER THAN ONE АВЕ
IN PICOFARADS.
C1114
R1120
CR1103 С1113
61106 61102 X К1124
C1116
R1123 (2115
C1118
С1117 eet
R1102 К1115
Q1101 C1104
C1101 R1103
R1101 —ma = R1105
©1107 E R1121
R1104 — C1103
91102 R1117
C1105 R1106
Q1105
Q1103
(И R1112
Figure 15-2. Component Location (Audio)
SECTION XV
15-1
| שא | س Гэв |
DESIG ITEM PART NO. МЕК
Capacitor, electrolytic, 5 uf, 15 vdc
Capacitor, electrolytic, 10 uf, 15 vdc Р65АС101015 МЕС
С1104
С1105
Capacitor, ceramic disc, 0.005 uf 8012505027, |
Capacitor, ceramic disc, 0.001 uf 861Z5U102Z
Capacitor, electrolytic, 100 uf, 15 vdc Р65АМ1610015
Р65АМ1610015
Elmenco
Capacitor, electrolytic, 100 uf, 15 vdc
Capacitor, electrolytic, 100 uf, 15 vdc
Capacitor, ceramic disc, 0.001 uf
C1108
C1109
C1110
G1111 Capacitor, electrolytic, 1000 uf, 25 vdc
Capacitor, mica, 100 pf DMI5EI101J
Capacitor, electrolytic, 25 uf, 15 vdc P65AG122515 MEC
P65AR24100015 | MEC
С1112 Capacitor, mylar, 0.047 uf
C1113 Capacitor, mylar, 0.047 uf
C1114
C1115
C280AA/P47K
С280АА/Р4ТК
Amperex
C280AA /P10K Amperex
C280AA/P10K Amperex
Capacitor, mylar, 0.01 uf
Capacitor, mylar, 0,01 uf
Capacitor, mylar, 0,047 uf С280АА /Р47К Amperex
Capacitor, mica, 100 pf DM15E101J Elmenco
Capacitor, ceramic disc, 0.001 861Z5U102Z Erie
С1119 Capacitor, 0.022 uf 192P22392 Sprague
CR1101 Diode SC-2 Semtech
CR1102 Diode 1N273
CR1103 Diode 1N273
Transistor ME217 Amperex
Q1102 Transistor ME217 Amperex
Q1103 Transistor ME217 Amperex
Q1104 Transistor ME217 Amperex
Q1105 Transistor 2N1193 Motorola
R1101 Resistor, composition, 27K +10%, 1/4 watt
R1102 Resistor, composition, 22K +10%, 1/4 watt
R1103 Resistor, composition, 8.2K +10%, 1/4 watt
15-2
DESIG ITEM PART NO. MFR
R1104 Resistor, composition, 22K +10%, 1/4 watt и: `
R1105 Resistor, composition, 2.7K %10%, 1/4 watt | ..: ו
R1106 Resistor, composition, 3.3K +10%, 1/4 watt אוו ₪
#1107 Resistor, composition, 470 ohms + 10%, 1/4 watt
R1108 Resistor, composition, 100 ohms +10%, 1/4 watt
R1109 Resistor, composition, 27K +10%, 1/4 watt
R1110 Resistor, composition, 3.3K +10%, 1/4 watt
R1111 Resistor, composition, 2.2K +10%, 1/4 watt | = em
R1112 Resistor, composition, 3.9K +10%, 1/4 watt ШИ rM
R1113 Resistor, composition, 10 ohms %10%, 1/4 watt E A |
R1114 Resistor, composition, 33K +10%, 1/4 watt ШЕЛЕКТІ
R1115 Resistor, composition, 4.7K +10%, 1/4 watt 07 ај ו
R1116 Resistor, composition, 10 ohms +10%, 1/4 watt ЕЖЕН:
R1117 Resistor, composition, 2.7% +10%, 1/4 watt | | ןוו
R1118 Resistor, variable, IK
R1119 Resistor, variable, 500 ohms
Resistor, composition, 1.2K %10%, 1/4 watt KT о
Resistor, variable, 1K
MTC-4-1K Mallory
15-1. The audio circuit receives signals from the beat
detector or the discriminator and applies audio output
to a speaker or the meter. Тһе circuit can also recieve
5 kc signals from the frequency divider and the LFO
and deliver beat notes to the speaker and meter.
15-2. With the function switch S1602 in position 1,
the LFO output signal is compared to harmonics of
the 5 kc spike input inthe LFO beat detector. The au-
dible 5 kc component is eliminated in Ше twin tee notch
filter. The beat notes are applied to the audio рге-
amplifier consisting of transistors Q1101 and Q1102.
15-3. With the function switch in position 2, beat notes
from beat detector Q1001 are applied to the audio pre-
amplifier. Audio from the preamplifier or from the
Resistor, composition, 2.7% +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 10K %10%, 1/4 watt
15-4. TYPICAL VOLTAGES. With the FUNCTION
Switch set to LFO CAL and with a beat frequency of
approximately 200 cps (one division of the LFO dial),
the following are typical voltages:
а. 5 mv peak-to-peak measuredat the base of Q1101.
b. 150 mv peak-to-peak measured at the emitter of
Q1102.
c. 15 v peak-to-peak measured at the emitter of
91104.
BUFFER AMPL (I3MC) MULTIPLIER (X5)
+ + -
BUFFER AMPL (65 МС)
| MULTIPLIER (X13)
* + +
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SIS 1 с1206 cizi pi С1215
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NOTES:
1. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE ІМ OHMS + Ю% 1/4 WATT.
2.UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE ARE IN MICRCFARADS,
THOSE MORE THAN ONE ARE IN PICOFARADS.
Figure 16-1. Schematic (Megacycle Multiplier)
TO 130 MC
~ MULTIPLIER
C1217
C1216
R1213
R1215
R1217
R1216
R1219
C1215
R1218
(91212 L1203 C1210 C1208
Q1204 L1204 С1214 C1213 Q1203 C1207 L1202 R1203 R1205
4 11201
; | | j Д, C1205
| : | | Я C1203
Q1202
C1204
Q1201
C1202
R1202
C1201
R1214 R1212 С1211/ R1209 | #1207 61206 R1206 R1204 R1201
R1211 R1210 #1208 C 1209
Figure 16-2. Component Location (Megacycle Multiplier)
SECTION XVI
16-1
PART КО.
DESIG МЕК
C1201 DM15E331J
C1202 Capacitor, mica, 100 pf рМ15Е1017
C1203 Capacitor, mica, 110 pf
C1204 Capacitor, ceramic disc, 0,01 uf
Capacitor, ceramic disc, 0.01 uf
Capacitor, mica, 110 pf ГМ15Е1117
Capacitor, mica, 620 pf DM1 5E621J
C1209 Capacitor, ceramic disc, 100 pf 8012501012 Erie
C1210
Capacitor, mica, 330 pf
Capacitor, mica, 100 pf рМ15Е1017 Elmenco
C1211
C1212
C1213
Capacitor, ceramic disc, 0.001 uf 8617501027 Erie
Capacitor, mica, 15 pf DM15E150J Elmenco
Capacitor, mica, 68 pf DM15E680J Elmenco
C1214 Capacitor, ceramic disc, 100 pf рм15Е1012 Elmenco
C1215 Capacitor, ceramic disc, 0.001 uf 861Z5U102Z
Capacitor, mica, 15 pf DM15E150J Elmenco
Capacitor, mica, 100 pf DM15E101J Elmenco
Coil 3370-9
Coil
Coil
Coil
Transistor
Transistor 2N1742
Transistor 2N1742
Transistor 2N1742
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 47 ohms +10%, 1/4 watt
Resistor, composition, 100 ohms £107, 1/4 watt
Resistor, composition, 18K 4100, 1/4 watt
16-2
DESIG ITEM
PART NO. MFR
Resistor, composition, 4.7K %10%, 1/4 watt
Resistor, composition, ІК +10%, 1/4 watt
Resistor, composition, 10 ohms #10%, 1/4 watt
Resistor, composition, 100 ohms %10%,
1/4 watt
Resistor, composition, 15K %10%, 1/4 watt
Resistor, composition, 2.2К +10%, 1/4 watt
Resistor, composition, ІК 1 0%, 1/4 watt
Resistor, composition, 10 ohms +10%, 1/4 watt
16-1. The megacycle multiplier receives 1 mc spikes
from the spike generator and delivers a 65 mc sine
wave to high frequency oscillator board A1604,
16-2. The 1 mc spike which is rich in harmonics is
applied to multiplier Q1201. Тһе output circuit of the
Resistor, composition, 100 ohms %10%, 1/4 watt
Resistor, composition, 15K +10%, 1/4 watt
Resistor, composition, ІК £10%, 1/4 watt
Resistor, composition, 100 ohms %10%, 1/4 watt
multiplier is tuned to the 13th harmonic by coil L1201.
The 13 mc signal is amplified by buffer amplifier Q1202.
This stage is tuned to 13 гас by coil 11202. Тһе 13 mc
signal is applied to multiplier Q1203, which is tuned
to the 5th harmonic by coil L1203. The 65 mc signal
is amplified by buffer-amplifier Q1203 which is tuned
to 65 mc by coil 11204.
11302 R1312 #1307 C1306 R1308 #1305 С1301 #1303
AMPLIF BUFFER DETECTOR
БІЗІ! 61314
pas 100 100 ЕП
4
(3-4 MC) 7
4 сїзо5
TO PHASE DET TO SWEEP
(MAIN LOCK) GATE
NOTES: R1314 C1310 СК1301 01304 C1302
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 17-1. Schematic (400 to 500 KC Mixer and Amplifier)
Figure 17-2. Component Location (400 to 500 KC Mixer and Amplifier)
3 SECTION XVII
17-1
REF
DESIG МЕК
C1301
С1302
С1303
С1304
С1305
С280АА/Р100К
С1306
С1307 Capacitor, mylar, 0.1 uf
Capacitor, ceramic disc, 0.001 uf
Capacitor, ceramic disc, 0,001 uf
Capacitor, mylar, 0.1 uf C280AA/P100K
Ё шс ee | ту
1,1301 387-1300 Wells
Electronics
L1302 387-1300 Wells
Electronics
Q1301 ME216
Q1303 Amperex
Q1304
R1301
PART NO,
Capacitor, mylar, 0.1 uf С280АА/Р100К | Amperex
Capacitor, mylar, 0.1 uf С280АА/Р100К | Amperex
Capacitor, mylar, 0.1 uf С280АА/Р100К | Amperex
Capacitor, mica, 130 pf ГМ15Е1317 Elmenco
Capacitor, mica, 820 pf ГМ15Е8217 Elmenco
Capacitor, mylar, 0.1 uf Amperex
Transistor
Transistor
Transistor
Transistor Amperex
Resistor, composition, 47K +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 4.7K +10%, 1/4 watt
Resistor, composition, 1K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 47 ohms +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
Resistor, composition, 330 ohms +10%, 1/4 watt
17-2
ITEM
PART NO.
Resistor, composition, 100 ohms +10%,
1/4 watt
Resistor, composition, 4,7K +10%, 1/4 watt
Resistor, composition, 100K +10%, 1/4 watt
Resistor, composition, 100 ohms +10%,
1/4 watt
Resistor, composition, 100K +10%, 1/4 watt
Resistor, variable, 5K
MTC-1-5K Mallory
Resistor, variable, 10K
17-1. The mixer and amplifier receives two signals
from 100 ke selector A1610 and delivers the 400 to500
ke difference signal to phase detector and sweep gate
А1614. The assembly also furnishes a sweep gate
control voltage.
17-2. A 3 to 4 mc and a 2. 6 to 3.5 mc signal are applied
to mixer Q1301 which produces a 400 to 500 kc output
signal. 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
MTC-1-10K Mallory
circuit of the amplifier is tuned by coil L1302. Potenti-
ometer R1316 provides control of output 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 kc 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 kc range, the detector dc output voltage
will fall 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.
TO SWEEP GATE
MC
SELECTOR
SWITCH
S i603
|
|
|
|
|
|
I
Ц
|
|
САР VALUE 3-35 pf 6 PLACES (CI60I - C606) САР. VALUE 1,5-20РҒ 6 PLACES (СІ607- СЕ)
САР, VALUE 1.5-20 pf I2 PLACES (СІ6ІЗ-С1624)
св9 = 61620 С(62| 04622 0623 4
Ci60! _ ₪602 ₪603 (1604 0605 СВОБ 61607 СІ608 61609 СВО Cle! ав? сєз сєз Ces Clel6 Ce" 8
Je elo] MT JETER | #1 בל 10 ES
5 120 Tez Їе Tes 47” 43 1 Js 10 33 27% 27 15
Cie49 201650 Loes L се52 Less Дс654 Loess |с65с (1657 | 8 cı659 | cl660 Д сіесі L cl662
1 3 4 Г по о 1 2 3 4 5 6 7 8 9 1 и
上 十 一 一 一 - 一 一 一 一 =!
EXT —————О TEST POINT ТР2
סד 3 TO 4
MC MIXER
= 2 ма >= 2 =
I7 TO 28 MC
R
OSCILLATOR 20 TO 32 MC IF AMPLIFIE
TO 3704
MC MIXER
TP3
TEST
POINT,
‚©
CRI407
> +
(Era l
1 к1421 2 Р
T зак 39 K !
" TEST
TP!
- POINT
C1420
+001
9— |
01404 | INPUT FROM
2NI742 -- 20 TO 32 MC
ч MIXER
с1418
с1416 .001
Зо [dit
= RI420 RI423
Cas Las es RI424
.001 100 !
T 2. + AAA. о+9у
81419 С1417
220K ы INPUT
| ? 3 CYCLE
= | SWEEP
ТЕЗТ
o ТР!
| Poir
NOTES:
|. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS
510% 1/4 WATT.
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES LESS THAN ONE
ARE IN MICROFARADS, THOSE MORE THAN ONE ARE IN PICOFARADS.
3. Ж SELECTED VALUE, NOMINAL VALUE SHOWN.
Figure 18-1. Schematic (Megacycle Selector)
R1416 61420 C1418 ТР1
R1423
R1420
C1415
R1424
R1418
R1417
T1402
CR1401
CR1403
R1425
CR1405
CR1402
C1406
C1409
Q1401
Q1402
R1408
R1407
R1406
C1404
Ж
Eu 6
К1413
> e
C1405
R1405
C1403 1
К1415 R1414 , C1417 | 681407 | R1411
R1404 C1413 C1414 R1419
Figure 18-2. Component Location (Megacycle Selector)
Q1404 C1416 R1421
T1403
R1422
TP2
С1419
ТРЗ
C1410
CR1404
R1412
CR1406
T1401
C1401
C1408
R1410
С1411
Q1403
R1409
C 1407
C 1402
R1403
R1402
R1401
С1412
TP12
SECTION XVIII
18-1
PART NO.
DESIG MFR
Capacitor, ceramic disc, 0.001 uf 86127501027, Erie
Capacitor, ceramic disc, 0.01 uf 8512501032 Erie
C1408 DM15E391J Elmenco
C1409 рМ15Е1017
C1411 Capacitor, mica, 430 pf DM15E431J Elmenco
C1412 Capacitor, ceramic disc, 0. 851Z5U103Z Erie
8512501022
С1416
C1417
Capacitor, ceramic disc, 0.001 uf
Capacitor, mica, 330 pf
Capacitor, mica, 390 pf
Capacitor, mica, 100 pf
Capacitor, ceramic disc, 0.01 uf
Capacitor, ceramic disc, 0.001 uf
851Z5U103Z Erie
C1419 861Z5U103Z Erie
8612501032 Erie
ET
been
Diode 1N914
CR1405 1N914
CR1406 1N914
QI401
Capacitor, ceramic disc, 0.01 uf
Capacitor, mica, 15 pf
Capacitor, mylar, 2 uf
Capacitor, ceramic disc, 0.001 uf
Capacitor, ceramic disc, 0.001 uf
Capacitor, ceramic disc, 0.001 uf
Diode, capacitive element
Transistor
Q1402
Q1403
Transistor
Transistor
18-2
REF
DESIG ITEM PART NO. MFR
Q1404 Transistor 2N1742
R1402 Resistor, composition, 22K %10%, 1/4 watt
R1401 Resistor, composition, 56K %10%, 1/4 watt
R1403 Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt
Resistor, composition, 470 ohms +10%, 1/4 watt
R1407 Resistor, composition, 15K +10%, 1/4 watt
R1408 Resistor, composition, ІК +10%, 1/4 watt
R1409 Resistor, composition, 470 ohms %10%, 1/4 watt
Resistor, composition, ІК +10%, 1/4 watt
*R1410 Resistor, composition, 10K +10%, 1/4 watt *selected value
R1411 Resistor, composition, 2,2K +10%, 1/4 watt
Resistor, composition, 10 ohms +10%, 1/4 watt
Resistor, composition, 10K +10%, 1/4 watt
R1417 Resistor, variable, 5K MTC-1-5K
R1418 Resistor, composition, 100 ohms +10%, 1/4 watt
R1419 Resistor, composition, 220K +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 Mallory
Mallory
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
Resistor, composition, 220K +10%, 1/4 watt
Transformer EP71
T1402 Transformer EP72
T1503 Transformer EP73
Singer
Singer
Singer
Test Point 119437-11 Ucinite
18-1. The megacycle selector receives a 20 to 32 mc
signal from mixer Q1003 and a 1 mc spike from the
Spike generator. Тһе selector delivers two signals with
a difference frequency between 3 and 4 mc, to mixer
Q1501 of 100 kc selector A1610.
18-2. The 20 to 32 mc signal from mixer Q1003 is
amplified by IF amplifier Q1404. Тһе output circuit
is tuned by transformer T1403 and by selection of ca-
pacitors. MC selector switch $1603 selects a trimming
capacitor tuned for maximum response within a one
megacycle range.
18-3. Oscillator Q1403 is tuned to approximate frequency
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 mc 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 mc
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 positive feedback
and therefore sharp rise and fall characteristics. Тһе
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 oscillator
signal to reactance diode CR1407. This portion is
filtered by capacitors C1413 and C1414 and is a dc
voltage. As shown in figure 18-3, the dc output level
is determined by the phase relations between the gate
pulse and the oscillator signal. If the local oscillator
drifts, the phase relations change and produce a change
іп Ас output. Тһе change in dc output changes the
effective capacitance of the reactance diode and auto-
matically corrects the frequency drift.
18-6. This type of bridge has a very narrow lock range.
To assist the circuit in locating a lock voltage, a three
cycle sweep voltage from sweep generator Q301 and
Q302 is applied to diode CR1407. Before lock is achieved,
this three cycle signal is effectively a dc 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 | |
(ОСК POSITION
LOW FREQUENCY
OSCILLATOR
— Q1403
SIGNAL
-------- DC OUTPUT LEVEL
₪5 ОС OUTPUT
Figure 18-3. Phase Lock Bridge Waveforms
18-3
аи :
EL Б 655704 ל A
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eter ^ А | n 0 ₪ Га үй Na 1
0 Я ant Я b 67 тӘ
127 1221 Kr ұм» ЫН
| Sé? "tete Pul Ч
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war zh ЭНЭ,
33
MUN
| 1 | N ЖІ eee ЖАТ» "TOS ₪ =
Ж ЛДА 1.327 ША NES m di
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LR E N с E П
Kc "e 43 р Se
M 4 Зүйн p -
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"ҮҮ! | У ЈГ ‘Wits هخ
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657 =
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: тэ...
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бокс
SELECTOR} —
SWITCH |Ж
51604 о | 2 3 9
[
4 5 тез В
9 9 и
c tf. c £. c c c c c у
625 (1626 (1627 1628 |1629 | 630 1631 (16321633.
СЕ
1.5 TO 20 pf 10 PLACES
3-4MC IF AMPLIFIER
T 7 о+ 9V
3
81517 81521 שו 5
47K š 5.6K Ш = С1522 С1523
וב
T1602 ] 33 Т וס
1
TEST POINT
TP4
» TO 400—500 KC
MIXER
+
С1514 01503
бо! ME 216
1 4 4)
164502 1 сі5і5 RISIB RI523
או IË 10uh T uo 10k 470
1
5
2.6 ТО 35МС
OSCILLATOR
L сә 81526 |
EI 22K
Е
ЕТЕСТОК
10
+ зу
BLOCKING
OSCILLATOR
2
ססו
TEST POINT
TP5
TO 400-500KC
= MIXER
юокс | 500
INPUT
FROM
DIVIDER =
91502 6
2NI742 ф
10K
4551520 01504 NOTES:
с1506 5 МЕ216 1. UNLESS OTHERWISE SPECIFIED
== 220 | RESISTOR VALUES ARE IN OHMS
士 10% 1/4 WATT.
. UNLESS OTHERWISE SPECIFIED
CAPACITOR VALUES LESS THAN
ONE ARE IN MICROFARADS,THOSE
MORE THAN ONE ARE IN PICO -
#1524 С1524 6 7
SWEEP FARADS，
1 Ж PROGRESSIVELY SHORTING
1 са:
= dE 47K оо Таго 3.3K וס. 5.6K |
TPS = TS.
TEST POINT CONTACTS.
= = > 4 —
|
INPUT
3
2
Figure 19-1. Schematic (100KC Selector)
TPó ©1502 #1505 C1506 T1501 C1504 С1511 С1505
R1510
C1512
C1520 R1512
C1521 | M
R1524 3 R1515
R1527 “= | : СК 1503
j | 224 =
Q1504 = - A CR1502
R1526 Ё: R1516
C1524 Ж 4 R1513
: AM =
C1517 — | 225 ка
ТРО 一 ` ` : ₪ с
CR1505 b KÉ со:
T1503 ы ₪ ‚ с=с С1516
R1522 | H R1514
C1519 L1502
R1523 R1502
C1514 C1502
Q1503 TP3
R1517 C1501
R1518 R1506
R1503
R1509
R1525 R1504
Ты; C1503
T1502
C1523
R1508
R1521 C1509 C1515 | 61508 | 11501 01501
C1510 | 81501
Figure 19-2. Component Location (100KC Selector)
SECTION XIX
19-1
REF
DESIG ITEM PART NO.
C1501 Capacitor, ceramic disc, 0.01 uf
C1502 Capacitor, ceramic disc, 0.001 uf
C1503 Capacitor, ceramic disc, 0.01 uf
C1504 Capacitor, ceramic disc, 0.01 uf
DM15E501J
C1505 Capacitor, mica, 500 pf
C1506 Capacitor, mica, 220 pf
Elmenco
C1507 Capacitor, mylar, 0.1 uf C280AA/P100K
DM15E390J
C1508 Capacitor, mica, 39 pf
Elmenco
DM15E270J
C1509 Capacitor, mica, 27 pf
C1510 Capacitor, mica, 130 pf
C1511 Capacitor, ceramic disc, 0.01 uf
Capacitor, ceramic disc, 0.001 uf
851Z5U103Z
8612501022,
C1515 Capacitor, mica, 130 pf DMISEI131J
C1516 Capacitor, mica, 560 pf DMI5E561J
Elmenco
Erie
Erie
Elmenco
C1517 Capacitor, mica, 220 pf וצ
Elmenco
86125010227,
MR330-.01
Paktron
C1520 Capacitor, mica, 33 pf, N750 TCN-33
Centralab
С1521 Capacitor, mica, 820 pf DM15E821J
Elmenco
C1522 Capacitor, mica, 33 pf DM15E330J
Elmenco
С1523 Capacitor, ceramic disc, 0.01 uf 851Z5U103Z
C1518 Capacitor, ceramic disc, 0.001 uf
C1519 Capacitor, ceramic disc, 0.01 uf
Erie
C1524 Capacitor, ceramic disc, 0.01 uf B61Z5U103Z
Erie
CR1501
thru Diode
CR1504
CR1505 Diode, voltage sensitive
Transitron
Transistor,
Amperex
Transistor 2N1742
Transistor,
Transistor
Coil, 10 uh
Coil, 10 uh
19-2
Amperex
REF
DESIG ITEM PART NO. MFR
R1501 Resistor, composition, 100 ohms %10%, 1/4 watt
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
R1505 Resistor, composition, 270 ohms %10%, 1/4 watt
R1506 Resistor, composition, 10К %10%, 1/4 watt
R1507 Resistor, composition, 10K %10%, 1/4 watt
R1508 Resistor, composition, ІК +10%, 1/4 watt
R1509 Resistor, composition, ІК +10%, 1/4 watt
27 ohms %10%, 1/4 watt
Resistor, composition,
Resistor, composition, 2.2 meg %10%, 1/4 watt
Resistor, composition, 100 ohms +10%, 1/4 watt ПЕН:
R1513 Resistor, composition, 220K +10%, 1/4 watt w
R1514 Resistor, composition, ІК +10%, 1/4 watt БЕЗЕР
R1515 Resistor, composition, 47 ohms %10%, 1/4 watt Ш. 2
R1516 Resistor, composition, 100K +10%, 1/4 watt NETS 3
Г R1517 Resistor, composition, 47K %10%, 1/4 watt ШЕГЕ тг
R1519 Resistor, composition, 4.7K %10%, 1/4 watt EST
R1520 Resistor, composition, 4.7K +10%, 1/4 watt LCE
R1521 Resistor, composition, 5.6K 4100, 1/4 watt הראמ
R1522 Resistor, composition, 100 ohms %10%, 1/4 watt
R1523 Resistor, composition, 470 ohms +10%, 1/4 watt
R1524 Resistor, composition, 3.3K %10%, 1/4 watt
R1525 Resistor, composition, 100 ohms %10%, 1/4 watt ШЕ
R1526 Resistor, composition, 22K +10%, 1/4 watt
R1527 Resistor, composition, 5.6K %10%, 1/4 watt
T1501 Transformer PIP-2 UTC
T1502 Transformer Singer
Transformer EP75 Singer
Jack 119437-11 Amperex
19-1. The 100 kc selector receives two signals from
megacycle selector А1607 and а 100 kc signal from
frequency divider A1612. Тһе selector delivers two
signals with a difference frequency between 400 and
500 kc to mixer Q1301 of 400 to 500 kc mixer and amp-
lifier A1613.
19-2. A 20 to 32 mc and 17 to 28 mc signal are applied
to mixer Q1501 which produces a 3 to 4 mc output signal.
The output circuit of the mixer is tuned to provide a 1
megacycle band pass. The 3 to 4 mc signal is amplified
by amplifier Q1503 and delivered to the 400 to 500 kc
mixer. 100 kc selector switch 51604 selects a trimming
capacitor tuned for maximum response within a 100 kc
range.
19-3. Oscillator Q1504 is tuned to approximate frequency
by selection of capacitors (C1635 through C1644) and to
an exact multiple of 100 kc by the phase detector. The
oscillator supplies a 2. 6 to 3. 5 mc signal to the 400 to
500 kc mixer.
19-4. Тһе phase detector operates іп the same manner
as the phase detector in the megacycle selector (see
section 18). The detector receives a 100 kc gate pulse
from frequency divider A1612. The 100 kc pulse is
shaped by blocking oscillator Q1502.
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MODEL RFA-20
RF ATTENUATOR
The Model RFA-20 is a 20db attenuator, designed for use with the Gertsch
ЕМ-9 frequency meter.
The RFA-20 must be used with the FM-9 to provide accurate output levels
in the .5 to 5uv range. This output range is obtained by operating with the
FM-9 "RF Output" switch in the 50uv position. The vernier control, "96 RF
Output", will then vary the output from .5 to 5uv (5 to 50uv divided by 10).
In addition to providing a 10 to 1 voltage reduction of the FM-9 output,
the RFA-20 protects the frequency meter from damage due to accidental keying
of transceivers.
Accidental keying of the transmitter, when directly connected to the FM-9
through the RFA-20, may result in a significant change in the impedance or
attenuation of the RFA-20. 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 240 J2
22 -
Parts List
jl Connector, UG-261/U
J2 Connector, Gremar 11274
Rl Resistor, composition, 62 ohms +5%, 1/4 Ki
R2 Resistor, composition, 240 ohms %5%, 1/4 ху
R3 Resistor, composition, 62 ohms +5%, 1/4 уу
THE SINGER COMPANY
METRICS ВОЈА = ои
Design and production of PANORAMIC + SENSITIVE RESEARCH + EMPIRE + GERTSCH instruments for measurement
Lertsch
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bertseh
Model КЕА-60 КЕ 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:
is 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.
ip 73 THE SINGER COMPANY
087507 | METRICS DIVISION gaea лы
Design and production of PANORAMIC • SENSITIVE RESEARCH * EMPIRE • GERTSCH instruments for measurement
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