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|  TM 11-5820-554-12
10-3. Items Comprising an Operable Controls, Radio Set, C 6118/FR-93 and C-7515/FRC-93
NSN
Item
Dimensions
Weight
Height
Depth
Width
Control, Radio Set C-6118/FRC-93 (Collins 312B-4) .................................
7 1/2
11 3/4
10 3/4
8 1/2
Control, Radio Set C-7515/FRC-93 (Collins 312B-5) .................................
7 1/2
11 3/4
10 3/4
8 1/2
Section II. INSTALLATION
10-4. Collins 312B-4 Interconnections
10-5. Collins 312B-5 Interconnections
With Collins KWM 2/2A
With Collins KWM-2/2A
Make phone patch, speaker, and RF connections to
Make power, phone patch, speaker, and RF
the receiver, exciter, and telephone lines as shown in
connections to the transceiver and telephone lines as
shown in figure 10 3. Use the RG -58C/U cables
be removed from the Collins 312B-4 and mounted
supplied for the RF connections. These cables are
elsewhere. Figure 10 5 shows the proper way to
slightly larger in diameter and 2 inches shorter than
reconnect the directional coupler to the indicator
those supplied for audio and control functions.
circuit.
NOTE
CAUTION
Other types of exciters may be used by
Be sure the vfo power plug is plugged into
connecting the PHONE PATCH OUT
the proper socket on the Collins KWM-
jack on the Collins 312B-4 to the exciter
2/2A chassis. This socket is J17 which,
microphone jack. The output voltage at
for normal operation, has a molded jumper
this jack on the phone patch is
plug inserted in it.
approximately equal to that of the average
high impedance dynamic microphone.
10-3
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