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|  TM 11-5820-509-35
Section
Action required
Reference standard
3.
Record oscillator output.
3.
Output at midpoint of slug rack for each band, not less than
1.0 volt rms at VFO jack.
4.
(a) Set inductors L125 through L144 to obtain calibration
4.
Align and track oscillator.
within 1 kHz at each end of all bands.
(b) Record tracking deviation at 000, 250, 500, 750 and
999 on the slug rack control for each band.
Maximum deviation not more than 12 kHz.
5.
Align and adjust receive rf circuit a.
5.
Peak inductors L7-L16, L22-L31, L37-L46, and L52 L61 for
maximum if. output. Level shall not be less than
0.04 volt rms at each .5-MHz increment of all bands.
6.
Peak inductors L5, and L67 to L76 for maximum rf output.
6.
Align and adjust transmit rf circuits.
Level shall be between 30 and 300 millivolts rms.
7.
(a) VFO jack, not less than 1.0 volt rms at 2.0 MHz.
7.
Record oscillator control isolation amplifier
(b) VFO jack, not less than 1.0 volt rms at 12.0 MHz.
output.
1.
(a} DC VOLTAGE meter reads in +18V, +23V, and
1.
Perform initial settings and adjustments.
PP-3518/PRC-47
+26.5V positions of VOLTAGE SEL switch with HV
ON-OFF switch at OFF.
(b) DC VOLTAGE meter reads in all positions except
FIL of VOLTAGE SEL switch with HV ON/OFF
switch at ON. Ac voltmeter reads approximately 6.3
volts rms in FIL position of VOLTAGE SEL switch.
(c) Set potentiometer A5R22 to + 19.0 0.4 volts dc at
test point A5J8.
(d) Set potentiometer A5R3 to -110 5.5 volts dc at test
point A5J2.
(e) Set potentiometer A5R4 to -32 1.6 volts dc at test
point A5J1.
2.
Dc ammeter reads not more than 12.5 amperes.
2.
Record fully loaded primary input current
using 23.0 volts dc input voltage.
3.
(a) PA plate voltage: In red portion of DC VOLTAGE
3.
Record all power supply output voltages
meter; ripple less than 3.75 volts rms.
and the ripple content of each with 23.0
(b) PA screen voltage: In red portion of DC VOLTAGE
volts dc primary input power.
meter; ripple less than 1.5 volts rms.
(c) Driver plate voltage: In red portion of DC VOLTAGE
meter; ripple less than 0.20 volt rms.
(d) Relay voltage: In red portion of DC VOLTAGE
meter.
(e) Filtered low voltage: In red portion of DC VOLTAGE
meter; ripple less than 0.075 volt rms.
(f) Regulated voltage: In red portion of DC VOLTAGE
meter; ripple less than 0.01 volt rms. Range of
adjustment from 18.0 to 20.0 volts dc; set to 19.0
0.4 volts.
(g) Filament voltage: 6.0 to 6.3 volts peak on
(h) PA bias voltage: Set to -110 1.0 volts; ripple less
than 0.10 volt rms. Driver bias voltage: Set to -32.0
0.5 volts; ripple less than 0.05 volt rms.
(j) Voltage regulator operation: Output from 18.5 to
19.5 volts dc as input is varied from 22.0 to 28.0
volts dc
4.
Ac ammeter reads not more than 3.0 amperes with ac
4.
Record fully loaded primary input current
mains between 97.8 and 112.2 volts at 380 to 420
using 110 volts, 400-Hz primary power
Hz.
source.
5.
(a) Relay voltage: In red portion of DC VOLTAGE meter.
5.
Record all power supply output voltages
and the ripple content of
6-11
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