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TM 11-5920-554-12
2-5. Accessory Equipment
Certain items of equipment may be used with the various configurations as optional, and are to be requisitioned
separately as needed by the using organization to ensure dependable communications.
a. Antenna Coupler CU-2004/U (Collins 180S-1). The radio set transportable or fixed station environment
may prove unsatisfactory for the installation of a fully extended antenna. In these circumstances, the transmitter
has to be loaded to a physically shorter or (in vertical operation) lower piece of antenna conductor. To ensure
safe operation of the transmitter, the following item should be ordered and used as instructed in the referenced
publication:
Item
Qty
Reference
Coupler, Antenna CU-2004/U
1
TM 11-5820-554-34-9
A typical use for the coupler is with an aircraft trailing wire antennas.
b. Dummy Loads. Dummy loads are available for testing of the AN/FRC-93 transceivers and the choice of
dummy load will depend upon the amount of rf power which has to be dissipated by the dummy load.
Recommended dummy loads are as follows:
Item
Qty
Reference
Dummy Load D-1 (100 watt operation only)
1
TM 11-5820-610-14
Dummy Load DA-412A/U (can be used for 1,000 watt operation for a limited time)
1
TM 11-5820-610-14
Terminal Protective Device (TPD) No. 11053186
Dummy Load DA-75/U (100 or 1,000 watt operation)
1
TM 11-5820-610-14
'This dummy load is the Collins Model DL-1 which must be used with a 6.3v ac control voltage to operate an internal relay. Remote
switching of DL-1 is actuated by the RT-718/FRC.
c. Multiplier and Notch Filter. Some of the RT-718/FRG-93 transceivers in use have the Waters Q-
Multiplier and Notch filter installed in them.  These items are no longer available for installation in the
transceivers; however, those transceivers which have them installed will require the maintenance outlined in
chapter 5 of this manual.
d. Terminal Protective Device (TPD). The terminal protective device is an accessory designed to protect
the Control Radio Set, C-6118/FRC-93 from damage due to high voltage transients such as produced by lightning
discharges close to the antenna installation.
Item
Qty
Reference
Terminal Protective Device (TPD) No. 11053186
1
TM 11-5820-610-14
2-6. Configurations
a. Radio Set AN/FRC-93(V)1, Transportable 100-Watt, 110/220-Volt Ac Configuration.
NSN
Item
Qty
Receiver-Transmitter RT-718/FRC-93 (Collins KWM-2A).............................................................................1.....................
.
Power Supply PP-3990/FRC-93 110/220-volt a.c. input (Collins PM-2)..........................................................1.....................
.
Control, Radio Set C-6118/FRC-93 (Collins 312 B-4) ....................................................................................1.....................
.
5995-00-034-4249
Microphone, Dynamic M-127/FRC-93 (Collins MM-1) ..................................................................................1.....................
.
Case, Electrical Equipment CY-6197/GRC-159 (Collins CC-2) ......................................................................1.....................
.
Crystal Unit Set, Quartz CK-31/FRC-93 (Collins CP-1) .................................................................................1.....................
.
Antenna, transportable (Collins 637 T-2)........................................................................................................1.....................
.
Case, electrical equipment (Collins CC-3) ......................................................................................................1.....................
.
Cable, coaxial (p/n 426-6026-00) ...................................................................................................................2.....................
.
Cable, patch (p/n 426-3027-00) ......................................................................................................................1.....................
.
b. Radio Set AN/FRC-93(V)2, Transportable 100-Watt 14-Volt Dc Configuration.
NSN
Item
Qty
Receiver-Transmitter RT-718/FRC-93 (Collins KWM-2A).............................................................................1.....................
.
Power supply 12 volt dc (Collins MP-1) .........................................................................................................1.....................
.
Control, Radio Set C-6118/FRC-93 (Collins 312 B-4) ....................................................................................1.....................
.
Change 5 2-2


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