Performance Tests, 26.5-volts DC Primary Power Source.

TM 11-5820-509-35

(2) The ac voltmeter shall read not more than

volts dc. Then move the multimeter dc lead to test jack

0.20 volt rms.

J8 (fig. 3-11) on Power Supply PP-3518/PRC-47.

i. Relay Voltage.

(6) Adjust potentiometer A5R22 (fig. 3-11)

until the multitester reads 19.0 0.4 volts dc.

(1) On the test fixture, place the HV ON -OFF

switch to OFF and rotate the VOLTAGE SEL switch to

(6) Connect the multimeter negative ( - ) lead

+26.5V.

to test jack J2 (fig. 3-11) on Power Supply PP-

3518/PRC-47.

(2) The DC VOLTAGE meter shall indicate in

the red portion of the meter scale.

(7) Adjust potentiometer A5R3 (fig. 3-11)

until the multimeter reads -110 + 5.5 volts dc.

j. Filtered Low Voltage.

(8) Connect the multimeter negative ( - ) lead

(1) Rotate the VOLTAGE SEL switch to

to test jack J1 (fig. 3-11) on Power Supply PP-

+23V. The DC VOLTAGE meter shall indicate in the

3518/PRC-47.

red portion of the meter scale.

(9) Adjust potentiometer A5R4 {fig. 3-11)

(2) The ac voltmeter shall read not more than

until the multimeter reads-32 1.6 volts dc.

0.075 volt rms.

d. Performance Tests, 26.5-volts DC Primary

k. Regulated Voltage.

Power Source. The tests listed in paragraphs e to o are

(1) Rotate the VOLTAGE SEL switch to

to be conducted in the sequence shown after these

+19V. The DC VOLTAGE meter shad indicate in the

initial conditions have been satisfied.

red portion of the meter scale.

(1) Connect the test equipment to the test

(2) The ac voltmeter shall read not more than

fixture as shown in figure 6-14 using the 0- to 15 ampere

0.010 volt rms.

dc ammeter.

(3) Connect the multimeter to test jack J8

(2) Install Power Supply PP-3518/PRC-47 in

(fig. 3-11) on Power Supply PP-3518/PRC-47. On the

the test fixture; then apply power to the Harrison 6434B

test fixture, place HV ON-OFF switch to ON and adjust

power supply.

A5R22 (fig. 3-11) to the counterclockwise stop and then

(3) On the test fixture, place the BLOWER

to the clockwise stop. The multimeter shall read not

ON-OFF switch to ON, rotate the VOLTAGE SEL switch

more than 18 volts dc nor less than 20 volts dc at the

to +19V, the +23V ON-OFF switch to ON, and then set

mechanical end stops respectively.

the HV ON-OFF switch to ON .

(4) Readjust A5R22 until the multimeter

(4) Adjust the terminal voltage of the Harrison

reads 19.0 + 0.4 volts dc; then return the HV ON-OFF

6434B power supply to 23.0 0.25 volts .

switch on the test fixture to OFF.

(5) Record the data required in paragraphs e

l. Filament Voltage.

through o below and compare with the reference

(1) Rotate the VOLTAGE SEL switch to FIL.

standard .

(2) Connect

the

oscilloscope

e. Input Current. The dc ammeter shall indicate

VOLTAGE jacks on the test fixture in place of the ac

not more than 12.5 amperes.

voltmeter; then place the HV ON-OFF switch to ON. ;

f. Power Amplifier Plate Voltage.

(3) The oscilloscope shall indicate between

(1) Rotate the VOLTAGE SEL switch to

6.0 and 6.3 volts ac peak.

+1500V. The DC VOLTAGE meter shall indicate in the

(4) Return the HV ON-OFF switch on the test

red portion of the meter scale.

fixture to OFF and disconnect the oscilloscope.

(2) The ac voltmeter shall read not more than

m. Power Amplifier Bias Voltage.

3.75 volts rms.

(1) Connect the ac voltmeter to the AC

g. Power Amplifier Screen Voltage.

VOLTAGE jacks on the test fixture and rotate the

(1) Rotate the VOLTAGE SEL switch to

VOLTAGE SEL switch to -110V

+650V. The DC VOLTAGE meter shall indicate in the

(2) Connect the multimeter to test jack J2 on

red portion of the meter scale.

Power Supply PP-3518/PRC-47.

(2) The ac voltmeter shall read not more than

(3) Place the HV ON-OFF switch to ON and

1.50 volts rms

adjust A5R3 (fig. 3-11 ) to -110 1.0 volts.

h. Driver Plate Voltage.

(4) The ac voltmeter shall read not more than

(1) Rotate the VOLTAGE SEL switch to

0.10 volt rms.

+300V. The DC VOLTAGE meter shall indicate in the

(5) Return the HV ON-OFF switch to OFF

red portion of the meter scale

and disconnect the multimeter.

n. Driver Bias Voltage.

(1) Rotate the VOLTAGE SEL switch to - 32V

6-26