Quantcast CHAPTER 10. CONTROL, RADIO SET C-618/FR-93 AND CONTROL, RADIO SET C-7515/FRC-93

 

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Organizational Troubleshooting Chart - TM-11-5820-554-120067
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TM-11-5820-554-12 Radio Set AN/FRC-93(V)1 AN/FRC-93(V)2 AN/FRC-93(V)3. AN/FRC-93(V)4 AN/FRC-93(V)5 AN/FRC-93(V)6 AN/FRC-93(V)7 Manual
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Tabulated Data - TM-11-5820-554-120069


TM 11-5820-554-12
CHAPTER 10
CONTROL, RADIO SET C-618/FR-93 AND CONTROL, RADIO SET C-7515/FRC-93
Section I. INTRODUCTION
10-1. Description
Control, Radio Set, C 6118/FRC-93 (Collins 312B-
to 30 MHz. The phone patch uses circuitry which
and Control, Radio Set C-7515/FRC-93 (Collins
allows vox phone patch operation. It may also be
312B-5) will be referred to as the Collins 312B-4
switched manually if desired. The vfo used in the
and the Collins 312B-5 station controls (fig. 10-1).
Collins 312B-5 is a 70K-2 oscillator which is the
Each contains a directional coupler, wattmeter, a
same as that used in the Collins KWM-2/2A.
permanent magnet (pm) speaker, a phone patch, and
Switching circuits are provided to allow the
appropriate switching circuitry. The same types of
operation of Collins KWM-212A on different
directional coupler, wattmeter, phone patch, and
transmit and receive frequencies or transmit-receive
speaker are used in both the Collins 312B-4 and
operation on the same frequency using either vfo.
312B-5. In addition, the Collins 312B-5 contains a
(Fig.  10-2)  shows  the  location  of  external
variable-frequency oscillator to provide separate
connections to the Collins 312B-5.  The Collins
transmit and receive frequencies when used with the
312B-4 is similar except for the absence of vfo
Collins KWM-2/2A. The wattmeter indicates power
connections. Items furnished with each equipment
levels within the ranges of
are listed in table 10-1.
0 to 200 or 0 to 2,000 watts, forward or reflected. It
is accurate to within +5 percent over the range of 2
Figure 10-1.
Collins 312B-4 and Collins 312B-5 station controls, front panel view operating controls.
10-1


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