AS-505/GR & ( )

Description

ANTENNA: AN Antenna AS-505/GR & ( ); vertically stacked array; for transmitting receiving; aluminum, olive drab paint finish; sectionalized, array consisting of 4 squirrel cage antennas; dimen 18” diam X 12 ft Ig; 4 sections, ea 18” diam X 14” Ig; mts on Mast AB-158/GR or on a “class 2” telephone pole; fixed; freq range 225 to 400 mc; 52-ohm coaxial transmission line feed; special - has a gain of approx 6db, beam is tilted upward at an angle of 6 degrees; u/w various UHF radio sets; USAF Exhibit ENG-240. FUNCTIONAL DESCRIPTION: Transmits and receives signals from a UHF transmitter and receiver operating over a frequency range of 225 to 400 mc.

AT-197/GR & ( )

Description

ANTENNA: AN Antenna AT-197/GR & ( ); discone type; transmitting-receiving; material aluminum w/OD paint finish; sectionalized; dimen 10” diam for upper section, 14” diam for lower section, 2’ high; twelve 1/4” hex rods 5” long mtd in a center support and equally spaced radially to form the top disk having an overall dimen of 10”, the lower element uses twelve 1/4” hex rods 12” long equally spaced radially at an angle of 30° from the center support to form an assimilated cone; has 2-1/2” diam mtg clamp that fastens to top of various types of masts; fixed type; freq range 225-400 mc; input impedance 52 ohms from RF transmission line; special-designed for broadband operation over the entire freq range; p/o Radio Set AN/GRC-27, AN/GRC-28, AN/GRC-29 & Radio Receiving Set Set AN/GRR-6; Mfr & Contr Allen D. Cardwell Mfg. Corp; USAF Exhibit WLENG-210 (in process); USAF Contract W-28-099-ac-81. FUNCTIONAL DESCRIPTION: Omnidirectional broadband antenna for transmitting or receiving RF signals in the 225-400 mc range.

RG-17A/U

Description

Cable: R F: AN RADIO FREQUENCY CABLE RG-17A/U: coaxial; 52 ohms impedance, 29.5 mmf/ft; max operating v 11,000 RMS; solid plain copper wire, 0.188” OD; outer cond: 0,760” maz OD, plain copper, single braid; polyethylene dielectric, 0,680” OD: outer covering: 0.870” OD, polyvinyl employing improved non-migratory plasticizers; designed for low temperature use; NME Spec JAN-C-17 w/exceptions. FUNCTIONAL DESCRIPTION: Large high power low loss cable.

UG-495A/U

Description

CONNECTOR, PLUG: One round male; straight type; 2.620” X 1 5/16 OD o/a; RF Connector, 50 ohms characteristic impedance; cylindrical, silver plated brass; “Rexolite”, molded; .960” dia; 3/4” -20 NEF -2 int thd mates with UG-60A/U; AN Plug Connector UG-495A/U. FUNCTIONAL DESCRIPTION: Terminates Radio Frequency Cable RG-17/U or RG-18/U.

MT-686/GR

Description

RACK: AN Rack MT-686/GR; relay rack; material aluminum w/blue-gray paint finish; empty; dimen 22” W X 20” D X 6’ H; three compartments; p/o Radio Set AN/GRC-27 and Radio Set AN/GRC-28; USAF dwg 49C56349. FUNCTIONAL DESCRIPTION: Two racks required. One houses Radio Receiver R-278/GR, Radio Receiver R-279/GR and Radio Set Control C-565/GR; the other houses Radio Transmitter T-217/GR, Modulator MD-101/GR and Power Supply PP-426/GR.

MX-1058/U & ( )

Description

SHELF, desk: AN Desk Shelf MX-1058/U & ( ); p/o Radio Set AN/GRC-27, AN/GRC-28, AN/GRC-29 and Radio Receiving Set AN/GRR-6; light weight metal; dimen 19” lg X 15” wd X 3” h when recessed in panel, the usable desk space dimen are 16” lg x 12” wd; mounts on front of any standard 19” relay rack, secures to rack by means of four (minimum) 12-24 screws; unit recesses into panel when not in use; Mfr & Contr Collins Radio Co; USAF Contract AF-33 (038)-6135. FUNCTIONAL DESCRIPTION: Provides a means for mounting handsets, headsets and microphones. Can also be used as a desk.

J-390/GR & ( )

Description

PANEL, distribution: AN Distribution Panel J-390/GR. & ( ); p/o Radio Set AN/GRC-27; aluminum w/olive drab paint finish; input and output 115 or 230v, 50-60 cycle and audio; dimen 19” wd X 5-1/2” h X 3” d; mts in Rack MT-686/GR; Mfr & Contr Collins Radio Co; USAF Exhibit WLENG-234-A; USAF Contract AF 33 (038)-6135. FUNCTIONAL DESCRIPTION: Standard 19-inch relay rack panel on which are mounted terminals for AC power, audio and control circuits. Used as a junction for connecting AC power from the mains and audio and control circuits from Control-Indicator C-806/GR to Radio Receiver R-278/GR or Modulator-Power Supply MD-129/GR when these components are mounted in Rack MT-686/GR

CG-707/U (-ft.-in.) & ( )

Description

CABLE ASSEMBLY, RF: AN RF Cable Assembly CG-707/U (-ft.-in.) & ( ); uses Radio Frequency Cable RG-8/U; length to be specified; terminates at one end in Amphenol connector 82-833 and at other end in RF Jack UG-60A/U; p/o Radio Set AN/GRC-27; Mfr & Contr Collins Radio Co; Exhibit WLENG-234A; USAF Contract AF 33 (038)-6135. FUNCTIONAL DESCRIPTION: Consists of a 2 ft length to be used as a flexible RF extension.

CX-1541/U (-ft.-in.)

Description

CABLE ASSEMBLY, power: AN Power Cable Assembly CZ-1541/U (-ft.-in.); uses Underwriters type SO cables, two No. 14 AWG stranded cond, ea cond 41 strands No. 30 AWG has copper wire twisted together for flexibility, 400v working; length to be specified; terminates at one end in plug AN-3106A-18-3S, clamp AN-3057-8, and adapter AN-3055-18-8 and at other end in solder lugs; p/o Radio Set AN/GRC-27; Mfr & Contr Collins Radio Co; USAF Exhibit WLENG-234-A; USAF Contract AF 33 (038)-6135. FUNCTIONAL DESCRIPTION: Connects Radio Receiver R-278/GR and Modulator-Power Supply MD-129/GR to Distribution Panel J-390/GR.

CG-693/U (-ft.-in.)

Description

CABLE ASSEMBLY, RF: AN RF Cable Assembly CG-693/U (-ft.-in.); uses Radio Frequency Cable RG-8/U; length to be specified; terminates at one end in Plug AN3108B-18-16S and other end in AN 3108B-18-16P, ea end has clamps AN3057-6 and adapter AN3055-18-6; p/o Radio Set AN/GRC-27; Mfr & Contr Collins Radio Co; USAF Exhibit WLENG-210A and WLENG-234-A; USAF Contract AF33 (038)-6135. FUNCTIONAL DESCRIPTION: Connects Modulator Power Supply MD-129/GR to Radio Transmitter T-217/GR.

CX-2017/U (-ft.-in.)

Description

CABLE ASSEMBLY, POWER, ELECTRICAL: Okonite type cable, 14 ea conductors, stranded, (2 ea No. 12 AWG, 12 ea No. 16 AWG), individual insulation is rubber, rubber outer jacket; shield around all conductors, tinned copper braid; length to be specified, terminated at one end with 1 ea Connector, Receptacle AN3108B-36-1S, other end 1 ea Connector, Plug AN3108B-36-1P, with 1 ea Clamp AN3057-12 on each end; Radio Receptor Co., Brooklyn, N.Y., USAF Contract AF33 (038)-12792; USAF Exhibit ENG-246; u/w Transmitter T-282/GR and Modulator-Power Supply MD-141/GR. FUNCTIONAL DESCRIPTION: A 4 ft length is used to connect Transmitter T-282/GR to Modulator-Power Supply MD-141/GR.

T-282/GR & ( )

Description

TRANSMITTER, RADIO: AN Radio Transmitter T-282/GR & ( ); AM type transmission; freq range 225 to 400 mc, single channel; power output: 100 w nominal; input: 115 v p/m 10 v, 230 v p/m 20 v, 50-60 cyc; rack mtd; dimen: 21” lg X 19” wd X 12-1/4” h, weigh 175 lb; crystal controlled, amplitude modulated class “C” final power amplifier stag p/o Radio Transmitting Set AN/GRT-3; Mfr & Contr Radio Receptor Co; USAF Exhibit ENG-246; USAF Contract AF-33 (038)-12792. FUNCTIONAL DESCRIPTION: This unit together with Modulator-Power Supply MD-141/GR form a complete single channel radio transmitter. Separate crystals are required for each frequency. Crystal frequency is multiplied 27 times. Approximately 100w of RF power is available from the final stage which is plate modulated from the modulator-power supply.

MD-141/GR & ( )

Description