Radio and Communications Equipment
(Ground-to-Air, Microwave, Satellite, Telephone, Teletype and Communications)

FGC-52 Teletypewriter Set
Specifications:
Printer/paper tape
20/60 ma local loop or 30 ma polar
Full or half duplex
60, 66, 75 or 100 wpm
95-125 or 190-250 VAC 60 Hz
192 Pounds
Notes: Off-line tape preparation, on-line transmission

GRA-6 - Control Group
The AN/GRA-6 is a remote control set for the remote operation, voice and keying of radio transceivers.
This set consists of two units, a subscribers set and remote set. It is designed for simplex operation, although it has a switching arrangement so that one of any two radios may be remoted at one time. Also included is an intercommunications capability between the subscriber to radio operator. This set is an integral part of the MRC-108. Use of this set is limited because of excessive line loss between the remoted subscriber and the radio set, particularly during the transmit mode of operation.
Capability: Simplex remote capability for voice and transmitter keying. Two transceivers may be tied into the GRA-6, although only one may be operated at one time. May be remoted up to three miles.
Frequency Range: Audio frequencies
Weight: 26 pounds
Manufacturer: Federal Telephone & Radio Corp.

GRA-39 - Control Group
The AN/GRA-39 is a device for the remoting of transceivers up to two miles. It furnishes both keying and
audio remote capabilities. It has a built-in speaker with amplifier and utilizes the H-138/U Handset. It is compatible with any radio set which uses the small cannon plug (such as is used on the H-138/U handset). The set consists of two units, a remote (subscribers) unit and local (at radio set) unit. It is an integral part of the AN/MRC-107 Radio Set.
Capability: Single radio channel remoted with key and audio up to two miles.
Frequency Range: Audio
Weight: 15 pounds
Manufacturer: Genreal Dynamics

GRC-175 - Radio Set
A compact ground-based radio equipment which transmits and receives multi channel voice communications within the VHF frequency range. The radio set and remote amplifier/control unit can be used as an independent radio station or operate as part of a communications facility to provide point-to-point or ground-to-air communications. Primarily, the radio set is used for voice communications between a ground controller and the pilots of aircraft within the controller's assigned area.
Capability: 40 watts nominal, amplitude modulated (AM), 680 channels spaced SO KHz apart. Channeling
time is 4 seconds.
Frequency Range: 116.0 - 149.975 MHz
Power Output: 25 Watts minimum, 40 watts nominal
Weight: 73 pounds
Manufacturer: Wilcox Electric Inc.

GRC-206 Communications Central
Features: Self-contained radio sets with UHF-AM, VHF-AM, VHF-FM, and HF-SSB radios.
Notes: On/off road tactical communications central replaces MRC-107/8.

GRC-206(V3): HF/VHF/UHF communications facility
Range: 30 km, 35 km, or 150 km, depending on antenna used.
Frequency: HF single sideband 2-29.9999MHz; VHF/FM 30-75.975MHz; VHF/AM 116-149.975MHz; UHF 225-399.975MHz
Power Output: HF 150 watts; VHF/FM 2 watts or 10 watts; UHF 2 Watts or 10 Watts
Channels: single channel
Notes: Mounted on an M-998 HMMWV; Remotable up to 2 km. Includes encryption devices

GRD-6 - Direction Finder Set
The AN/GRD-6 is a UHF Radio Direction Finder used for determining the bearing of aircraft from the DF station. Directional information is determined from the Phase variations of an aircraft's UHF transmissions as received by two AN/GRC-6 antennas. These antennas are mounted on adjustable-height masts for diversity operation, which minimizes aircraft bearing errors resulting from direct or ground-reflected
waves. A phase meter or synchro system displays bearing information at the local station or up to four remote stations by the azimuth orientation of an indicator needle. Channel selection, target transmitter operation for self-check, and system "on-off" can he controlled from any of the remote stations.
Capability: The AN/CRD-6 has 1750 channels, 10 of which may be manually preset. Bearing information
is displayed instantaneously on selected frequencies. The equipment functions equally well using amplitude modulated (AM) or continuous wave (CW) UHF signals. In addition, remote sites may be located at distances up to 10,000 feet from the local station.
Frequency Range: 225 to 399.9 MHz
Weight: 2247 pounds
Manufacturer: Federal Telephone and Radio Corp., Raytheon Manufacturing Co.

GRD-11 - Direction Finder Set
The AN/GRD-11 is a UHF radio direction finder used to determine the bearing of aircraft from the operating site. The AN/GRD-11 determines bearing information from the UHF transmitter on board the
aircraft and displays the information (as a directional strobe) on a cathode ray tube (CRT). The system is composed of equipment for a local and remote site. The local site consists of radio receiving equipment,
antenna, and display and control equipment. The remote site equipment consists solely of display and control equipment. Connections between the two sites are accomplished by two pair field telephone wires. The AN/GRD-11s controlling site is determined by positioning the local-remote switch on the local equipment.
Capability: GRD-11 has 1750 channels of which 20 are preset. The equipment is designed to receive continuous wave (CW) or amplitude modulated AM) carrier signals.
Frequency Range: 225 to 399.9 MHz
Weight: 1790 pounds
Manufacturer: Servo Corp of America

GSQ-120Radar Data Transfer System
Range: 1 kilometer (?)
Power Output: 1 watt
Notes: for remoting radar

GTA-6A - Telephone Central Office Group, Manual
The GTA-6A provides telephone communications for radar stations and their related radar networks. It
provides intercommunication between operating personnel at the radar station in addition to communication with outside points in the radar network. DASC uses it for intra-site communications. Completely self-contained, this telephone central group is not dependent on any other type communications or radar set. It is used with the AN/TRC-97A, AN/ TRC-66A, AN/TRC-87 and other prime radio equipment, plus the SB-86 and SB-22 switchboards.
Capability: GTA-6A has 40 telephone operator units (10 line boxes). Capable of providing 160 outside wire lines to be used for telephone or radio communication. These are broken down as follows:

Weight: 4806 pounds
Manufacturer: Connecticut Telephone and Electric Corp.

KWM-2A HF Single Sideband Transceiver
The KWM-2A is a manually tuned HF (SSB-CW) transmitter-receiver. It is a crystal controlled transceiver;
however, it can be tuned up to 200 kc above each of the 26 crystal positions. The crystal selector has 12
crystals built-in which cover all the HF amateur bands and an additional 14 positions in which crystals may be interchanged to cover the remainder of the transceiver coverage. The only drawback with this highly versatile transceiver is the lack of coverage from 5.0 to 6.5 mcs. With the 50 to 2000 ohm impedance matching output, it is capable of being used with nearly any type of antenna system available
with good to excellent results. The set contains no internal power supply; however, several types of power supplies are available which make it possible to operate the set from either fixed or mobile configurations. There are two types of amplifiers available to boost the RF signal, the 30L-3 (1 KW PEP) and the 30S-1 (2 KW PEP). This allows phone patching as well as containing a directional watt meter for measuring forward and/or reflected power to the antenna. This radio set is used in the Maintenance
Net or in conjunction with the tropo-scatter radio for antenna alignment coordination with the distant end. It is also used in the TACS in the Commander's Radio Net.
Capability: HF: USB, LSB, CW. Phone patching available with additional equipment. Transportable complete station with CC-2 carrying case (less antenna). Manually tuned.
Frequency Range: Continuous from 3.4 to 30.0 Mcs (except 5.0 to 6.5 mc). Coverage divided into 200 kc bands.
Power Output: watts PEP on SSB and 135 (approximately) on CW. With 30L1 linear SSB is 500 watts PEP, CW is 350 watts.
Weight: 50 pounds
Manufacturer: Collins Radio Co.

MCC-12 - Multiplexor
The AN/MCC-12 is a frequency division multiplexor set used to connect sixty telephone subscriber circuits into a microwave radio relay system. The multiplexing frequency buildup consists of 60, 0-4 KHz wide channels,"stacked" one above another ranging in frequency from 12 KHz to 252 KHz to maintain channel separation. This composite band of frequencies is fed to a radio transmitter, such as the AN/TRC-66A, for transmission to a distant station, either line-of-sight or tropospheric scatter mode. Any one voice frequency channel can be selected to accommodate 16 multiplexed TTY channels simultaneously with the
other 59 voice frequency channels. The MCC-12 is housed in a portable shelter, capable of mounting on an M35, 21/2 ton truck.
Capability: Inputs from subscribers can be either 2 wire or 4 wire 600 ohm impedance."N-Band" signaling is compatible with the AN/TRC-66A and AN/TRC-97A. A built-in test set offers complete alignment and troubleshooting capabilities. Further, the AN/MCC-12 is capable of handling 59 voice frequencies and 16 FSK teletype channels.
Frequency Range: Baseband from 12 Kc to 252 Kc
Weight: 4775 pounds
Manufacturer: Lenkurt Electric Co., Electronics Communications, Inc.

MRC-107A - Communications Central
The AN/MRC-107A is a mobile radio set consisting of HF (SSB), VHF (AM), VHF (FM), and UHF (AM) radios and a M-151A1 1/4-ton truck (Jeep). This set can be operated with internal (vehicular) power, external power, or emergency power (battery), in either a fixed or mobile configuration. It has a remoting capability using the AN/GRA-39 Remote Set. This set enables remoting capability of up to three miles for any of the radio sets installed. The radio and vehicle are "drip proof" and can be operated
during inclement weather. Storage facilities are available for the associated back pack radio sets (PRC-47 and PRC-41), with a built-in battery (BB-451) charger for these radios.
Capability: HF: USB, AM, CW, FSK and NSK. VHF: FM and AM (two radio sets). UHF: AM. Fixed or mobile operation with remoting capability up to 3 miles for keying and audio operation, compatible with any one of the four radio sets.
Frequency Range
HF: 2.0 to 29.999 Mcs in 28,000 channels, automatically tuned.
VHF-FM: 30.00 to 75.95 Mcs in 920 pretuned channels.
VHF-AM: 116.0 to 149.95 Mcs in 680 pretuned channels.
UHF-AM: 225.0 to 399.95 Mcs in 3500 pretuned channels plus guard; 20 channels may be preset plus one manual.
Power Output
HF: SSB-400 watts PEP; AM-FSK-200 watts.
VHF-FM: Low band - 2 w; high band - 1.5 w.
VHF-AM: 13 watts optimum, 25 watts maximum.
UHF-AM: 13 watts optimum, 20 watts maximum.
Weight: 2614 pounds
Manufacturer: Main Contractor: General Dynamics

MRC-108 - Communications Central
The AN/MRC-108 is a vehicle mounted multiband radio set. It is capable of HF (SSB), VHF-FM, VHFAM
and UHF-AM, all operable in either the fixed or mobile configuration. The radio equipment is mounted on a pallet; each radio set is removable or the entire pallet may be removed. The AN/MRC-108 may be powered either by built in power, external power generator or vehicle battery under emergency conditions. The MRC-108 has built-in compartments for the portable back-pack equipment (PRC-41 and
PRC-47) and has a built-in battery charger for the BB-451 Battery used to power the pack radios. The radios may be individually remoted by the AN/GRA-6 Remote Set.
Capability
USB, LSB, AM, CW and FSK (when compatible FSK converter is used - TH- 5/G).
VHF-FM: Single channel operation from 5-15 miles.
VHF-AM: Single channel operation from 5-15 miles.
UHF-AM: Ground/Air. Remotable up to 3 miles with the AN/GRA- 6 Remote Unit.
Frequency Range
HF: 2.000 to 29.999 Mcs or 28000 channels - auto tuned; VHF-FM: Low band - 2 w.; high band - 1.5 w.; VHFAM: 116.000 to 149.975 Mcs, 1360 pretuned channels; UHF-AM: 225.000 to 399.950 Mcs in 3500 pretuned channels plus guard; 20 channels may be preset,
plus one manual.
Power Output
SB-400 watts PEP: AM-FSK-200 watts. VHF-FM: 1.0 to 2.0 watts.
VHF-AM: Low band -2. watts; high band 1.5 watts.
UHF-AM: 13 watts optimum; 20 watts maximum.
Weight: 2,650 pounds
Manufacturer: Collins Radio Co.

PRC-25 - Portable VHF FM Radio
The AN/PRC-25 is a short-range, man-pack portable, FM, receiver-transmitter, operating in the VHF
frequency range, and is used to provide two-way voice communications. When used at a fixed location, the AN/PRC-25 can be remotely controlled using a remote control unit such as the AN/GRA-39. The operating range can be extended by use of a fixed, elevated ground plane antenna, or a long wire antenna (AT-984A/G). The set is battery operated, with a duty cycle of 9:1, receive-transmit ratio. Range is from
5 to 15 miles dependent upon terrain and type antenna. Used to enter Army tactical radio nets by both DASC and TACPs. For vehicular operation, the transceiver is connected to the vehicle power source and redesignated the AN/GRC-125.
Capability: Single channel simplex with 920 channels spaced 50 Kc apart in two bands.
Frequency Range
Low Band ......... 30.00 to 52.95 Mcs.
High Band ....... 53.00 to 75.95 Mcs.
Power Output
2 watts low band.
1.5 watts high band.
Weight: 23 pounds
Manufacturer: R.C.A.

PRC-41 - Portable UHF Radio
The AN/PRC-41 is a lightweight, portable UHF/AM receiver-transmitter. The versatility of this
equipment permits man-pack, fixed station, vehicular or airborne operation. This equipment is stored in a pack transit case which contains all the accessory items required for fixed,portable or vehicular station operation. Automatic relay operation may be provided when two PRC-41's are operated together. Remote control operation may be provided when used with the AN/GRA-6 or similar remote
control set. This set is primarily used for ground-to-air operation by the Forward Air Controller.
Capability:1750 channels spaced 100 Kc apart, operation is AM (A3A).
Frequency Range: 225.0 to 399.9 Mcs.
Power Output: 1.5 to 3 watts
Weight: 35 pounds
Manufacturer: Collins, Motorola, General Dynamics

PRC-47 - Portable HF SSB Radio
The AN/PRC-47 Radio Set is a complete portable high frequency communications system including
antenna and accessories. The radio set provides continuous wave (CW) and upper sideband (USB) voice transmission and reception in 1-kc increments over the frequency range of 2 to 11.999 mc. The equipment is also capable of frequency shift keying (FSK) communications when operated in conjunction
with a frequency shift keying converter. The radio set may be operated at its own control panel or from a remote control panel such as the AN/GRA-6. The equipment may be operated in portable, vehicle or fixed installations. During portable operation, the complete equipment is packed by two men; however, the set cannot be operated while being carried. While portable, the radio is powered by a 24 volt wet cell
battery (BB-451) which is part of the equipment. For the mobile application, the equipment is mounted in a suitable vehicle and is powered by the vehicle's 26.5 volt generator/battery. For fixed station applications, the equipment may be powered by 115 volt, single-phase, 400 cps power supply. For high power voice or CW operation (extended time), the radio set duty cycle is 1 minute (maximum) of transmission for every 9 minutes (minimum) of reception. For low power extended time operation, the duty cycle for voice or CW operation is 2 minutes transmit for 9 minutes receive time. Limited low power cycle is 10 minutes transmit for 5 minutes receive operation, not to exceed one hour total. For normal
voice communication, with 1 minute transmission and 9 minutes reception, one battery (BB-451) charge will last approximately 12 operating hours (less in temperatures below 0°F).
Capability: CW, Voice, TTY (FSK) on USB (FSK converter necessary for RTTY operation, such as the TH-5/G), manual tuned.
Frequency Range: 11.999 Mcs. continuous in 1 Kc channels.
Power Output
High Power: 100 watts PEP (20-76 w on AS-1320).
Low Power: 20 watts PEP (4-15 w on AS-1320).
Weight: 65 pounds
Manufacturer: Collins, Motorola, General Dynamics

PRC-66B - UHF Transceiver
The AN/PRC-66B is a compact, lightweight, manpack, amplitude modulated (AM) UHF radio transceiver. Channel selection is by frequency synthesis. A guard channel receiver, fixed-tuned to receive 243.00 MHz, permits simultaneous monitoring of the guard channel and any other selected frequency. The AN/PRC-66B is capable of transmitting and receiving wideband, normal bandwidth (3 KHz) audio. It can transmit a continuous 1000 Hz tone for direction finding (DF) purposes, has speech compression, automatic gain control (ACC), adjustable carrier-operated squelch, and it features both silent and blackout operation. It can be powered by a clip-on battery pack, or by the vehicle supply when installed in a jeep.
Capability: 3500 channels spaced every 50 KHz. Will interface with KY-38 ground ciphony set.
Power Output: 2 watts average
Weight: 5.5 pounds
Manufacturer: Collins Radio

PRC-104 HF Radio Set

R-390 Radio Receiver
Link: http://www.fernblatt.net/390.html

RD-217/UNH - Tape Recorder
The Model S-124 Magnetic Tape Recorder - Reproducer comes in a carrying case, consisting of a cabinet, bottom cover, and top cover with handle. All controls are conveniently located on the front panel. The machine contains no rubber belts to wear and moveable parts operate at extremely slow speeds.
Capability: The Model S-124 Twenty-Four hour Single Channel Magnetic Tape Recorder - Reproducer has been engineered and designed to perform the specific task of continuously recording any desired communication signal, over any period of time up to 24 hours, without tape change. In addition,
the time in minutes from 0000 to 1455 (24 hours, plus a 15 minute overtime allowance) has been
precision printed on the back side (uncoated surface of the tape, allowing synchronization with any 24 hour timing device. The type ST-124 reels of magnetic tape used are small in bulk (3 3/4" in diameter and 2 1/4" thick) allowing them to be stored conveniently. They can be bulk erased in approximately 5-10 seconds with the Model BE-24 Demagnetizer
Weight: 26.5 pounds
Manufacturer: The Sound Scriber Corporation

RO-368 - Recorder
The RO-368 is a recorder used to record and reproduce voice signals received by telephone or radio through Operations Central AN/TSQ-91 (V). While operating in the record mode, the recorder can simultaneously record on eight tracks from eight separate input channels and monitor one channel. While
operating in the reproduce mode, the recorder can reproduce previously recorded voice intelligence from any one channel.
Weight: 34 pounds
Manufacturer: Borg-Warner Corporation, Controls Division, Santa Ana, California

S-138 - Teletype Van
The S-13R Teletyne van provides a means of communications by a typewritten and a perforated printed tape copy. It is used to transmit and receive two full duplex encrypted messages over DC lines or radio carrier. This unit operates at speeds of 60 or 100 words per minute (WPM) and is capable of transmitting and receiving on DC lines of 20 or 6o milliamps neutral or 30 milliamps polar. This unit does yet have
means of furnishing line battery; it must be obtained from an external source.
Capability: Two full duplex encrypted circuits
Manufacturer: Teletype Corp., Kellogg Co., Stromberg Carlson Corp.

SB-22/PT - Field Switchboard
The SB-22/PT Telephone Switchboard is a portable, immersion proof
field telephone switchboard used for interconnecting local battery
lines and . line equipment used in conjunction with teletypewriter and
remote control radio communications. The SB-22/PT provides switching and
signaling of 12 field telephones, 12 teletypewriter circuits, 12 remote
control radio circuits or any combination of these facilities. Whenever
this switchboard is used to interconnect teletypewriter circuits, a converter
such as the TH-5/G and a teletypewriter are required at the switchboard
location. This enables the switchboard operator to communicate
with the outlying teletypewriter stations. Two SB-22/PT switchboards
may be connected in tandem to handle a total of 24 lines.
Capability: 12 telephones, teletype or remote radio channels.
Weight: 30 pounds
Manufacturer: North Electric Manufacturing Co.

SB-86/P - Field Switchboard
The SR-86/P Manual Telephone Switchboard is a local battery, field type switchboard, capable of serving a maximum of 30 telephone or voice-frequency telegraph lines. If additional equipment (TA-207/P Switchboard Signal Assembly) is available, un to 60 lines can be connected. The SB-86/P may be used to connect voice-frequency teletypewriter circuits together by using a TH-5/TG telegraph terminal, and
suitable teletypewriter equipment. Signaling may be accomplished by either operating a hand ringing generator (magneto signaling) or lifting the handset from the cradle (common battery signaling).
Capability: 30 line circuits, with additional TA-207/P 60, Peak load 15 calls.
Weight: 125 pounds
Manufacturer: Kellogg Switchboard & Supply Co.

SB-239/GTA - Communication Patching Switchboard
The SB-239/GTA Switchboard is designed primarily for operational use as a telephone and teletypewriter matching switchboard. It is part of and dependent upon a fixed field system installation that Provides an external power source and a means of intercommunication when the switchboard circuits are completed by plus-in cord assemblies. An electrical meter assembly is included to determine the audio level input and output and the amount of line current flowing through teletypewriter circuits. Terminal blocks in the bottom of the switchboard comprise a distribution frame for cross-connections required by the using agency.
Capability: 96 Three-jack telephone lines; 48 Three-jack teletype lines.
Weight: 175 pounds
Manufacturer: Insuline Corp. of America, Hallamore Manufacturing Co.

STU-III Secure Telephone Unit

TA-312/PT - Field Telephone Set
The TA-312/PT Telephone Set is a local battery (LB) or common battery (CB) manual telephone. It may also be arranged for operation as a local battery telephone using common battery signaling (CBS). It will operate under all outdoor conditions, in ground of two or more, or in conjunction with a switchboard. A receptacle is provided for connecting the Handset-Headset H-144/U, which may be used in place of the handset provided. In addition, the telephone set can be used to control remotely operated radio equipment by operation of the press-to-talk switch on the telephone handset.
Capability: The TA-312/PT is capable of one voice telephone transmission up to 250 miles (dependent upon type wire used). It may also be used to remote one radio channel.
Weight: 9.6 pounds
Manufacturer: Kellogg Switchboard & Supply Co.

TA-341 - Telephone Set
The TA-341 is a transistorized semi-ruggedized telephone desk instrument. The AC/DC signaling scheme provides compatibility with the AN/'ITC-30 and any similarly equipped electronic central office. The Telephone Set comes equipped with a canvas carrying case and sling for field transportability. The TA-341 is used to originate and receive calls by the way of the associated switching facility, or can be connected "back-to- back" with another Telephone Set for point-to-point service. It is a four-wire instrument and uses local battery power. Voice-frequency tones are used for digital and supervisory signaling to and from the
AN/TTC-30.
Capability: Can initiate conference calls to four stations. Five instruments can be connected to one telephone circuit. The TA-341 is capable of one voice telephone transmission.
Manufacturer: North Electric Co., Galion, Ohio

TA-720 - Telephone Set
The TA-720 employs dual tone multi-frequency (DTMF) signaling. This is controlled at the keyset on the Telephone Set Subassembly TA-720/TTC and the register unit. The Telephone Set Subassembly TA-720/TTC and Telephone Set Subassembly TA-811/TTC operate together to provide means for terminating four four-wire telephone circuits to the Electronic Switching Center AN/TTC-30 and one six-wire ground-to-air circuit. The basic functions performed are signaling, detection of signals, and detection and transmission of voice communications.
Capability: 4 4-wire telephone circuits. 1 6-wire ground-to-air circuit.
Manufacturer: North Electric Co. Galion, Ohio

Tape Recorder 24 Hour voice
Photos

TCP 101 - VHF Radio
The TCP-101 is a lightweight, portable, air-to- ground VHF transceiver. There are 680 crystal-controlled
transmit channels available for selection by a Collins autopositioner system controlled by the 614U-6 Control Unit. Frequency selection may be on single channel simplex (SCS), double channel simplex (DCS), or double channel duplex (DCD) circuits which provide a shift in frequency of 6 MHZ between the transmitter and receiver. The 51X-2B receiver is a double conversion super heterodyne type operating in the 108.00-151.95 MHZ range, and has 880 crystal-controlled channels available. Housed in a fiberglass transit case, it comes equipped with antenna, speaker and coaxial cable.
Capability: SCS, DCS, DCD operation on 680 channels spaced 50 KHZ apart. Receive on 880 channels.
Frequency Range: Transmit: 116.0 - 149.95 MHz; Receive: 116.0 - 151.95 MHz
Power Output: 133.95 MHZ is 25 watts; 134.0- 149.95 MHZ is 20 watts.
Weight: 85 pounds
Manufacturer: Collins Radio

TCG-14(V) - Teletypewriter Set
The AN/TGC-14(V) is a compact, rugged and portable teletypewriter compatible with all other teletypewriters used by the military. This set uses the standard Baudot system and is capable of 60, 75 or 100 words per minute (WPM) with equipment furnished. This set is an integral part of the AN/TSC-53 and AN/TSC-15 Radio Sets. It is used to monitor, receive/transmit and to communicate between locations via radio teletype, although it is possible to use this set with wire.
Capability: An hysterisis-synchronous alternating current motor is available for 115 volt, 60 cycles per second operation, and an additional motor is available for 115 volt, 400 cycles per second, single phase operation. For housing these components, either a tactical or non-tactical case is selected. Optional shock mounts, available for either case, are used for installation sites in which the equipment will be subjected to
severe shock or vibration. The versatility is further extended by the patching options which allow half- duplex (simple), full duplex, or off-line local operation. In addition, by proper patching, it will supply signal line current up to 100 milliamperes at 28 VDC. Operational speed can be varied; speed change gears for 60, 75 and 100 words per minute are supplied.
Power Output: Signal line output may be installed into signal line of 20 to 80 milliamperes without any internal adjustments.
Manufacturer: Mite Corp.

TH-5/TG - Telegraph Terminal
This unit is a rugged, compact, light-weight teletype converter. It converts the 20 milliamp DC mark-space from the teletypewriter to a tone which may be sent long distances on wire or radio. The send side converts a neutral GC mark-space current into voice frequency FFK (tone) signal. The receive side converts the voice frequency FSK (tone) signal to a 20 milliamp, neutral mark/space OC current. The set also includes a telephone termination for coordination between users. Telephone set TA-312 may be connected to the terminal positions indicated on the TP-5/TO front panel. A 90-volt, 20-cps ring signal is available for telephone ringing.
Capability: The TH-5/TG is capable of half or full duplex operation or may be wired for split operation,
e.g., receive/transmit from two different stations. Telephone operation capability on TTY wire, when TTY is not in operation.
Manufacturer: Stromberg-Carlson

TRC-24 Radio set, transportable
Frequency: 50-1875mHz
Power Output: 10-120w
Channels: 12
Notes: VHF system. The TRC-24 was the radio equipment in the TRC-36 and TRC-61 vans.  The Air National Guard expanded the TRC-24 vans to fill the relay and terminal functions better.
Photos

TRC-32 Air/Ground Communications Sets
The AN/TRC-32 is a transportable radio set, with 1750 selectable frequencies operating in the 225.0-399.9 MHZ range. The AN/TRC-32 is made up of two permanently installed AN/GRC-27 radio sets plus radio set control C- 1335/TRC-32 and control group OA-578/TRC-32. Antenna mast AB-158/GR supplied
permits antenna height selection from 10'-90'.
Capability: 1750 frequencies in the UHF range. 20 preset frequencies are available at the remote site. Maximum remoting distance is 10 miles.
Frequency Range: 225.0 - 399.9 MHz
Power Output: 100 watts nominal
Weight: 5332 pounds
Manufacturer: Collins Radio Corp.

TRC-36 Point-to-point Radio Relay Set (Relay)
Notes: Broadband, VHF frequency

TRC-61 Point-to-point Radio Relay Set (Terminal)
Notes: Broadband, VHF frequency

TRC-66A - Radio Set
The AN/TRC-66A Radio Set is a general purpose, super high frequency (SHF), line of sight (LOS), radio relay and tropospheric forward scatter system. The AN/TRC- 66A is packaged in two identical radio equipment shelters designed for rapid tactical deployment. For line of sight operations, one AN/TRC-66A shelter is employed at each terminal station. For the tropospheric scatter mode, two AN/TRC-66A shelters (one radio set AN/TRC-66A) are employed at each terminal station, thereby improving reception
through diverse operations. The equipment can be transported by helicopter, truck, or cargo aircraft. The antenna consists of a reflector, support structure and a dual polarized (horizontal and vertical) feed horn. The antenna reflector is parabolic in shape and is constructed of sheet metal sections which are bolted together for operation. In addition, the antenna is stored in a transit case during transport, and is designed for rapid erection at the operating site. Each AN/TRC-66A shelter houses the radio equipment, a portion of the waveguide transmission lines, and accessory equipment. This shelter is also the mounting base for the antenna when set up for operation. The equipment is compatible with the AN/MCC-12 Frequency
Division Multiplexer which has 12 to 252 KHZ baseband output.
Capability: Capable of transmitting multiplex voice, teletype or data channels. In conjunction with the AN/MCC-12, the AN/TRC-66A has the capability of transmitting 60 multiplexed voice channels simultaneously. One voice channel may be designated for transmission of 16 teletype channels. This
set may be used as a fixed terminal, relay, combination terminal/relay, with capability to drop out or insert information into the system.
Frequency Range: 4400 to 5000 MHz (4.4-5.0 GHz).
Power Output
Tropo: 1 KW nominal.
LOS: 1 watt.
Weight: 2684 pounds
Manufacturer: General Instrument Corporation

TRC-75 - Radio Set
The AN/TRC-75 is a high frequency (HF) radio set which provides reliable, long range, two-way communications. The AN/TR C-75's 28,000 directly selectable frequency channels, fast automatic tuning, ease of maintenance, and retention of comparability with existing AM stations, makes it a highly versatile radio set. The linear amplifying characteristics of the high flower transmitter allow a wide power
transmitter allow a wide range of operating applications. The AN/TPC-75 will operate with a whip or long wire antenna, using the AN/GRA-6 Control group (not supplied). The unit can be vehicle mounted and operated while the vehicle is in motion, or installed and operated in a fixed location.
Capability: Transmission and reception on any of 2, 000 selectable frequencies in the HF frequency range (2.0 to 20.999 mcs). operating modes are single sideband (SSF) voice, amplitude modulated (AM) voice, tone modulated CW, or teletype modes. The control panel associated with the equipment permits manual
selection of the 1 KC spaced channel frequencies.
Power Output: 100 Watts low power or 1 kW high power
Weight: 435 pounds
Manufacturer: Collins Radio Co.

TRC-87 - UHF Communications Central
The AN/TRC-87 is a two-way 3500 channel Ultra High Frequency (UHF) communications set. The radio provides five Amplitude Modulated (AM) voice channels; four channels using manually tuned transmitter-receiver groups, and one channel using an automatically tuned transmitter-receiver group. The radio set is operated through a remote control system (supplied) or through an alternate electronic telephone system (not supplied). The four manually tuned transmitter receiver groups provide fixed frequency voice channels at the remote site, while the auto channel provides selection of any one of 21 preset (automatically tuned) voice channels. The electrical equipment shelter, S-285/TRC-87, houses the transmitting-receiving groups during operation and provides storage space for all accessories during transit. The shelter is designed to operate with a four wheel mobilizer which can be used for ground transportation. Four brackets on the front and rear walls of the shelter (two on each wall) are used to secure the mobilizer to the shelter. The AN/TRC-87 is mounted on three parallel skids to facilitate moving and loading. Lift and tie down eyes are provided at the upper four corners of the shelter.
Capability: available voice frequencies in UHF range. Twenty-five are available at the remote site, 4 manual and 21 auto voice channel. Maximum remoting distance is 5 miles.
Frequency Range: 225.0 - 399.95 MHz
Power Output: 100 Watts
Weight: 2840 pounds
Manufacturer: Motorola
Photos

TRC-97A - Radio Set
The AN/TRC-97A is a tactical tropo-scatter radio set with dual space diversity, designed to provide
two way voice, digital data and teletype communications. It can also be used for line-of-sight (LOS) and diffraction propagation. A variety of RF power modes can be selected to achieve optimum operation up to 100 NM with single links using any one of the three propagation modes. Longer distances (up to 1000 NM) can be achieved with tandem links using other TRC-97As as repeater stations. The teletype (TTY) multiplexer can be patched into any one of 24 voice frequency channels to provide 16 TTY channels. The system employs either a horn antenna elevated fifty feet to clear obstacles or a highly directional, high gain parabolic dish antenna.
Capability: Full duplex voice, teletype, FSK or data channels. The TRC-97 employs 12 channels and the TRC-97A (used in the TACS) employs 24 channels, 23 voice and one channel capable of providing 16 teletype circuits. The set may be used as a fixed terminal, relay, combination terminal/relay with capability to drop out or insert information into the system.
Frequency Range: Continuous 4400 to 5000 MHz. (4.4 - 5.0 gcs).
Power Output
Tropo: 1 Kw nominal
LOS: 1 watt
Weight: 1760
Manufacturer: R.C.A.
Photos

TRC-115 Point-to-point Radio Communication Set
Power Output: 1 Kw
Manufacturer: Collins URG-1
Notes: HF frequency; transportable, full duplex multi-sideband multiplex TTY/Voice;

TRC-170V3 Radio terminal set, Tropospheric and Line of sight
Frequency: 4.4-5.0 GHz, FM
Power Output: 2 KW
Range: from 50 to 200 miles
Channels: 60
Notes: Point-to-point communications

TRC-199 Tactical Repeater
Notes: Self-contained/stand-alone unit

TCS-15 - Communication Central
The AN/TSC-15 Communications Central is a transportable HF (SSB) radio set. Two and four wire (simple/
duplex) voice and teletype channels may be operated from this using the local operator equipment or remote field equipment. The equipment is mounted in the S-208/TSC-15 shelter and is transportable in several modes: M-37 truck, M-35 truck, M-105 trailer or the 4000C3 mobilizer dolly. The AN/TSC-15
features complete phone patching capability from either field type telephones or commercial telephone systems, all patched through the four-cord, five-line push-button switchboard. The radio features electronic multiplexing, combining several voice and teletype channels into a single radio frequency,
simultaneously receiving and transmitting information. The set may also be operated in the normal simplex transceiver mode.
Capability: HF: USB, CW and AM. Simplex or Duplex operation. Either sideband may be divided into two independent radio channels (4 total). Four teletype signals may be placed simultaneously on either channel 1 or 4. FSK teletype may be operated also on either side band. Maximum simultaneous capability
is 4 teletype and 3 voice channels transmit/receive. An automatic ring down capability is available to each telephone line allowing subscriber to subscriber (wire or radio) ring-down. Built-in teletype (TGC-14) may be used to either monitor incoming/outgoing teletype signals or to communicate via wire or radio. The switchboard is capable of patching up to four parties to either wire or radio or a conference
including the operator, and up to four other parties either radio or wire.
Frequency Range: 2.0 to 29.999 Mcs in 1 Kc channels, 28,000 total. All auto-tuned.
Power Output
HIGH POWER: SSB 1000 watts PEP, DSB 500 watts per side band, multi-channel 250 watts per channel (all PEP). Each of the multi-channel is 1.5 Kc wide. CW AM-FSK 750 watts PEP.
LOW POWER: SSB 200 watts PEP, DSB 100 watts per side band, multi-channel 50 watts per channel. CW-AM-FSK 40- 80 watts.
Weight: 2000 pounds
Manufacturer: Collins Radio Co.

TSC-53 Communications Central
The AN/TSC-53 Communications Central is a transportable communications set which provides both HF
voice and teletype and VHF/UHF air-to-ground communications facilities for a Forward Air Control Post (FACP). Also, it serves as an intra site communications net between the radar set (AN/TPS-44), operations central (AN/TSQ-61), tropo-scatter set (AN/TRC-97), and other on-base subscribers. In addition, the AN/TSC-53 provides an inter site communications capability. There are a total of 30 radio telephone
(rad tel) circuits which connect with corresponding radio telephone circuits in the AN/TSQ-61 operations
central, 12 switchboard drops on the SB-22A/PT switchboard, and 24 tropo circuits which connect with corresponding circuits in the AN/TRC-97.
Capability: The AN/TSC-53 consists primarily of two (2) AN/ARC-51BX UHF transceivers, two (2) R/T-807A VHF transceivers, one (1) AN/GRC-106 HF transceiver, and one (1) AN/GRC- 157 transceiver. Both the AN/ARC-51BX and the R/T-807A provide simplex, amplitude modulated (AM) communications.
The AN/GRC-106 provides simplex, upper sideband (USB), amplitude modulated (AM), or continuous-wave ( CW) communications. The AN/GRC-157 provides simplex/duplex single sideband radio telephone communications, or simplex/duplex teletype communications.
Frequency Range
AN/ARC-51BX...... UHF (225.0 to 399.95 MHz)
R/T-807A .......... VHF (116 MHz to 149.95 MHz).
AN/GRC-106 HF/USB (2 MHz to 29.999 MHz).
AN/GRC-157 ........ HF/SSB (2 MHz to 30 MHz).
Power Output
AN/ARC-51BX ...... 20 watts minimum for all channels
R/T-807A .......... 40 watts maximum.
AN/GRC-106 ........ 400 watts PEP (Peak Envelope Power).
AN/GRC-157 ........ 1 Kw (PEP).
Weight: 5600 pounds
Manufacturer: National Manufacturing Co.

TSC-60(V) Communications Central
The AN/TSC-60(V)-1 Communications Central is an HF/SSB radio housed in an air conditioned shelter. Two 1 KW transmitters, receivers and associated equipment provide voice, CW, teletype or high speed data, multiplexed teletype and speech-plus-teletype signals.
Capability
1. Up to eight speech channels (4 per radio set)
2. Up to eight speech plus TTY channels (4 per radio set)
3. Eight TTY channels non diversity or four TTY diversity channels to replace a speech or speech plus TTY channel.
Frequency Range: 2.0000 to 29.0000 MHz
Power Output: 1 Kilowatt
Weight: 5000 pounds - S-448/TSC-60(V)-1; 3500 pounds - MT-4207/TSC-60(V)-1
Manufacturer: Collins Radio

TSC-62 - Communications Central
The AN/TSC-62 consists of a deployable, air conditioned shelter equipped with circuit patching facilities, test equipment and a 12-line manual switchboard to provide efficient and rapid implementation of intra- and inter-site communication within the TACS. Major functions of the AN/TSC-62 include: performance of circuit and radio channel quality tests; restoration and re-routing of telephone, teletype and digital communications under adverse conditions; and continuous supervision of each communications facilities operating condition. The central is also equipped with a telephone and teletype order wire facility to quickly respond to changing tactical communications requirements.
Capability: 276 duplex audio channels. 144 duplex teletype DC channels. 24 duplex audio circuits connecting remote control units or telephone subsets equipped for transceiver operation and control. 16 duplex units are provided for interfacing teletype equipment with circuits having standard voice frequency tone signals. HF/SSB Receiver. Used to monitor the RF output of local HF/SSB transmitter
or receiver signals from other locations.
Weight: 4252 pounds - 424/TSC-62; 1655 pounds - 0A-8466/TSC-62
Manufacturer: Stelma Inc. Division of Data Products Stamford, Conn.

TSC-83 Satellite Communications System
Antenna: Large dish, 20 foot Quick Reaction Satellite Antenna (QRSA)
OE-361(V)1, small dish, eight-foot AS-3036/TSC

TSC-94A(V)2 Satellite Communications System
Antenna: Large dish, 20 foot Quick Reaction Satellite Antenna (QRSA)
OE-361(V)1, small dish, eight-foot AS-3036/TSC
Notes: SHF radio system

TSC-100A(V)2 Satellite Communications System
Antenna: Large dish, 20 foot Quick Reaction Satellite Antenna (QRSA)
OE-361(V)1, small dish, eight-foot AS-3036/TSC

TSC-147 Joint Tactical Information Distribution System (JTIDS),

TSQ-53 Communications Set

TSQ-111 Technical Control Facility
Notes: Circuit patch and test facilities, test equipment and a 12-line manual switchboard to provide rapid implementation of intra-site and inter-site communication; also equipped with a telephone and teletype order wire facility

TSQ-146(V) Multiplex System

TSQ-165 Modular Air Operations Center (MAOC)
Dimensions: 8 by 24 by 20 feet
Work Stations: 12, linked by a dual redundant Ethernet Local Area network
Notes: Provides the tactical facilities for the senior element in the Air Force Theater Air Control System. It is the facility that plans, directs and coordinates all aspects of the theater air war. Equipped with state-of-the-art voice communications system providing integrated telephone, radio and intercom functions. A MAOC shelter is an ISO three-to-one expandable, transportable by tactical airlift, sea lift, truck or mobilizer.

TTC-30 Telephone Central Office
The AN/TTC-30 consists of two interconnected mobile communications modules which provide automatic switching of four-wire telephone circuits under control of Dual Tone Multi-Frequency (DTMF) signaling. Computer programming techniques are employed to assign telephone subscriber numbers, to route numbers and to program routing instructions. Special features include direct area dialing, automatic alternate routing of calls over switched trunks, and pre-empt ion privileges for key personnel. Special interface equipment make it compatible with AUTOVON, Army, Commercial and current manual switchboards.
Capability: 384 subscriber and trunk terminals
Manufacturer: North Electric Co., Galion Ohio

TTC-32 - Telephone Central
The AN/TTC-32 is a semi-automatic, cordless, non-blocking switchboard. It provides audio functions under control of an operator within the Direct Air Support Center (DASC) complex. The switchboard performs switching functions required to establish and control intra- and inter-communications with the Electronic Telephone Central Office AN/TTC- 30, Telephone Set TA-720, and Manual Telephone Switchboard SB-22.
Capability: 20 links through which calls can be established. 40 subscriber lines (terminations). 20 (maximum) two party conversations.
Manufacturer: North Electric Co., Galion, Ohio

TTC-39A - Telephone (Circuit) Switch
Lines: 300 (single van) 600 (dual vans)
TTC-39A(V)1 Telephone (Circuit) Switch
TTC-39A(V)3 Telephone (Circuit) Switch
TTC-39A(V)4 Telephone (Circuit) Switch
TTC-39D Telephone (Circuit) Switch
TTC-39E Telephone (Circuit) Switch
Notes: Mobile, automatic, modular, electronic circuit switch. It operates under processor control with integral COMSEC and multiplex equipment. The AN/TTC-39 switches secure and nonsecure voice and data traffic. It is compatible with the Defense Communications System AUTOVON and with the tactical communications systems of the armed services.
Photo

TTC-41: Telephone System
Notes: Similar to the TTC-39A supporting 160 subscribers

TYC-39 DDN Switching Center
Notes: 50-line, mobile, automatic, electronic store and forward switch under processor control with integral COMSEC and multiplex equipment.

UGC-32 - Teletypewriter
The AN/UGC-32, commonly known as the ASR (automatic send-receive), provides a means for receiving typewritten page messages and manually originating messages between two or more stations which are similarly equipped, and connected by a telegraph or radio channel. The ASR also provides facilities for automatic transmission at maximum available line speed through a transmitter distributor, and manual preparation of fully perforated, typed tape, either at line speed or at an unmonitored offline maximum speed of up to 106 words per minute. A keyboard selector switch determines the mode of operation. In addition, an auxiliary typing re perforator can receive and record incoming messages independent of the other components of the set.
Capability: 65 or 100 words per minute operation. Incoming-outgoing and blind tape cutting for terminal and/or relay operation. 20 or 60 milliamps neutral or 30 milliamps polar input from signal line to electronic keyer. This unit may be used in conjunction with the TH-5 or similar converter devices when conversion from DC to tone operation is required.
Manufacturer: Teletype Corp.

UGC-129(V)1 Information Terminal and Printer
Notes: Terminal and printer used to compose, record, transmit, receive, edit, display, and monitor record message traffic.

UGC-144 Subscriber Terminal
Notes: Three user operated single subscriber terminals (SST) providing a high speed data system capable of composing, editing, storing, displaying, receiving, and transmitting messages into AUTODIN.

URC-119 HF/SSB Radio
Notes: Used for voice communications

URC-119(V2) HF/SSB Radio
Frequency: Tunable from 1.6 to 29.99999 KHz (10Hz steps)
Power Output: 500W voice or CW radio system
Notes: controllable from up to one mile with a remote control cable and remote control unit, or telephone lines.

VRC-46 - FM Radio
Provides short range, two-way, frequency-modulated (FM) radiotelephone communications between vehicles. The receiver-transmitter is manually tuned; no preset channels or remote control are available.
It is a rugged, lightweight, compact receiver-transmitter housed in a watertight case. All operating controls are located on the front panel.
Capability: Frequency Modulated (FM), 920 channels spaced 50 KHz apart with distance range on
high power or 20 miles while stationary and 15 miles while moving; single channel operation.
Frequency Range
Band A - 30.000 to 52-95 MHz
Band B - 53.00 to 75.95 MHz
Power Output
High Power - 35 watts minimum
Low Power - 1 to 3 watts
Weight: 52 pounds
Manufacturer: LTV Inc., Memcor Division

VRC-47 Radio set
Notes: Short range, vehicular

Wilcox 807A - VHF Radio
The Wilcox 807A is a VHF transceiver built with solid state circuitry, except for the power amplifier.
Channeling is accomplished by diode switching matrices. Maximum channeling time is four seconds. In the TACS, the 807A is used in the TSC-53 Communications Central, MRC-107 Communications Central, and as a portable VHF transceiver.
Capability: 40 watts nominal, amplitude modulated (AM), 680 channels spaced 50 KHZ apart. Channeling time is 4 seconds.
Power Output: 40 watts maximum
Weight: 15.9 pounds
Manufacturer: Wilcox Electric Co.