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CHAPTER 3. DS AND GS MAINTENANCE AMPLIFIER-POWER SUPPLY GROUP OA-3633(*) /GRC
Up
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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Figure 3-1. Fabrication of transmit and receive dummy load assemblies.


TM 11-5820-498-35
Publication
b
ME-30(*)/U represents ME-30A/U, ME-30B/U, ME-30C/U, a
Item
ME-30E/U.
a
TS-723(*)/U represents TS-723A/U, TS-723B/U, TS-723C/U,
Spectrum Analyzer
TS-723D/U.
TS-723(*)/U  a
TM 11-5097
b. Materials and Tools Required.
a
ME-26(*)/U represents ME-26A/U, ME-26B/U, and ME-26C/U.
Item
Federal stock No.
Identified in
Resistor, 7.6 ohms (e below).
Resistor, 275 ohms (e below).
Resistor, 14.5 ohms (e below) . . . . .  5905-279-3521
Resider, 300 ohms (e below) . . . . . . . . .  5905-101-8850
5820-893-1323 . . . . . . . . . . . . . . . . . . .
Mounting MT-1029/VRC . . . . . .
TM 11-5820-498-12
Cable Assembly, Power, Electrical CX-  5995-823-2726 . . . . . . . . .. . . . . . . . . . .
TM 11-5820-498-12
4720/VRC (10 ft).
Cable Assembly, Special Purpose, Elec- 5995-889-1061 . . . . . . . . . . . . . . .
TM 11-5820-498-12
trical CX-4655/GRC (e below).
5935-863-5876 . . . . . . . . . . . . . . . . . . . .
TM 11-5820-401-35
Connector, receptacle, electrical (male,
oval; same as J21 in MT-1029/VRC).
Connector, receptacle, electrical (female, 535-853-5944 . . . . . . . . . . . . . . . . . . . .
TM 11--5820-401-35
oval; same as J23 in MT-1029/VRC.
Connector, receptacle, electrical (female, 5935-853-6044. . . . . . . . . . . . . . . . . . . .
TM
11-5820-401-35
elliptical; same as J24 in MT-1029/
VRC).
Tool Kit, Electronic Equipment TK-
100/G.
Tool Kit, Electronic Equipment TK-
106/G.
Notes
MT-1029/VRC is required if a fabricated power distribution box (d below) is not avaailable.
For fabrication of power distribution box (d below as substitute for the MT-1029/VRC.
AM-2060(*)/GRC SET POWER connector
c. Power Source Required. (1) Power Supply
through the CX-4655/GRC.
PP-6224/U or
PP-2953(*)U maybe used
(1) Remove the two connector plugs from the
to provide the operating dc voltage for the
CX-4655/GR C (b above).
AM-2060(*)/GRC. The PP-2952(*)/U is normal
(2) Designate one of the connector plugs as
internally adjusted to provide 25.2 volts dc output
the transmit dummy load assembly, and correct
(TM 11-6130-233-12.)
the load resistors (b above) as shown in figure
(2) If a dc power source other than the
3-1.
ones in (1) above
is used, it should be
(3) Designate one of the connector plugs as
capable of providing a regulated, filtered, dc out-
the receive dummy load assembly, and connect
put of 25.5 volts dc at approximately 5 amperes.
the load resistors (b above) as shown figure 3-1.
(3) If the area in which the testing is being
performed has difficulty in obtaining an ac power
3-4. Connecting Dc Power to AM-2060(*) /
source that is within the operating ac input volt-
GRC
age of the PP-2953(*)/U or other power supply),
There are two methods for connecting dc power to
use Variable Power Transformer TF-523/U (fig.
the AM-2060(*)/GRC. One method is to use the
3-3). Refer to TM 11-5950-212-15 for installa-
MT-1029/VRC (a below): the other method is to
tion and maintenance of the TF-523/U.
use a fabricated power distribution box ( b
d. Power Distribution Box. As a substitute for
below).
the MT­1029/VRC which is only used as a con-
CAUTION 1
necting device between the dc power source and
Before making dc power connection make
the AM-2060(*)/GRC during testing and trouble-
sure the dc power supply POWER switch and
shooting, a power distribution box may be fabri-
the PWR switch on the AM-2060(*)/GRC
cated. Refer to paragraph 3-4b for fabrication de-
are set to off.
tails.
CAUTION 2
e. Transmit and Receive Dummy Load Assem-
If the CX-4720/VRC power cable is used
blies. Fabricate two dummy load assemblies to im-
itate the transmit and receive states of the re-
(a(2) and b(4) below), make sure the red-
white leads are connected to plus (+) ter-
ceiver-transmitter that would be connected to the
Change 2
3-2


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