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Figur 3-19. AM-2060(*)/GRC, test setup for audio amplifier distortion test
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TM-11-5820-498-35 Radio Sets AN/VRC-53 AN/VRC-64 AN/GRC-125 and AN/GRC-160 and Amplifier Power Supply GROUPS 0A-3633/GRC and 3633A/GRC Manual
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Circuit Breaker Test of PWR Switch


TM 11-5820-498-35
3-22. Audio Amplifier Distortion Test
a. Test Equipment and Materials.
(1) Generator, Signal AN/URM-127.
(6) Voltmeter, Electronic
(2) Spectrum Analyzer TS-723A/U.
ME-30(*)/U.
(3) Mounting MT-1029/VRC.
(7) Resistor, carbon: 130
ohms, ±10%, 5 watts.
(4) Power Supply PP-2953(*)/U, or equal.
(5) Receive dummy load assembly (para 3-3e, fig. 3-1).
b. Test Connection and Conditions. Connect the equipment as shown in A, figure 3­19. Turn on the
equipment and allow it to warm up 5 minutes before proceeding,
c. Procedure.
(2) Short circuit test. No two pins on P2
3-23. CX-4655/GRC, Test Procedure
and P5 should indicate a short circuit (O ohm)
a. Test Equipment and Materials. Use Multi-
when the ME­26(*)/U is connected between the
meter ME-26(*)/U as an ohmmeter.
pins on the connector.
b. Test Connections and Conditions. Use the
ME-26(*)/U as instructed in c below.
c. Procedure (fig. 3­5).
(1) Continuity test. Use the ME-26(*)/U to
test the continuity (O ohm) between each pin of
connector P2 with the corresponding pin on
connector P5, except that between pins F, L, and
R there is no continuity (infinite resistance).
3-26
Change 2


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