AN/GRC7 PARTS (USA, ITA, Port, FRA)

Stazione radio AN GRC/ 3-5-7 è composta da un apparato ricevitore con sintonia continua da in FM. circuito supereterodina a semplice conversione ed a modulazione di frequenza .alimentazione fornita tramite alimentatore posto all'interno del ricevitore da 12 vcc (PP-281 GRC) 24vcc (PP-282 GRC) apparato 1 RT, sintonia continua FM, 80 canali memorizzabili.   Ricevitore controllato a cristallo a modulazione di frequenza a doppia conversione di frequenza e di un trasmettitore a modulazione di frequenza che usano un'antenna in comune.  Alimentazione fornita dall'alimentatore 12 vcc (PP-109 GR) 24 vcc(PP-112 GR) che fornisce tutte le varie tensioni occorrenti all'apparato RT 70.  Questo è un ricetrasmettitore in sintonia continua da 47 a 54,4 mhz, potenza di uscita:0,5 w ricevitore supereterodina a modulazione di frequenza a doppia conversione di frequenza,e di un trasmettitore a modulazione di frequenza che usano un circuito d'antenna in comune.  L'AM-65 amplificatore dell'interfono per la funzione nel sistema interfonico delle stazione radio, come amplificatore di ascolto delle uscite dei due ricetrasmettitori e del ricevitore ausiliario (informazioni dettagliate manuale TM - 115039); la base MT-297 GR base di supporto e di collegamento di tutti gli apparati dei vari complessi descritti nel manuale TM 11 - 284

more details scroll down

GRC radio is a robust FM radio-set, designed for vehicular use, applied in several communication set-ups: stand alone as VRC-9, or in larger systems GRC-5, GRC-6 and VRQ-2, M-38A1 Jepps and other vehicles.  In1960's was used by US Army and some NATO countries. It's powered by PSU PP-109/GRC with 12 volts battery or PP-112/GRC with 24 volts battery. It could also be used in the field with auxiliary-kit MX-898/GRC, including generator G-8/GRC and (not neccessary) a battery-box CY-590/GRC.

Is a low power transceiver with frequency range 47-58 MHz FM (VHF) continuous tuning or two presets, superheterodyne receiver frequency modulated dual frequency conversion, channel spacing 100 kHz.  Power output 0.5 Watt, range about 1 mile. Power requirements 90 VDC and 6 VDC.

 The RT-70 Transceiver with the power supply AM-65 are also mentioned as subassemblies of radio sets GRC-4, GRC-5, GRC-6, GRC-7, GRC-8,  PRC-16, or vehicular unit as VRC-7

Dimensions: (12 7/8 x 7 1/4  x 5 1/4, 16 3/4 lbs)

Spare Tubes: 3B4 (1); 3Q4 (4); 3A5 (3); 1L4 (3); 1U4 (6); 1R5 (1); 1S5 (1); 1AE4(1)
Spare Parts: GH-1992-2 Lamp Incandescent (3)

Technical manual TM-11-290

Power Supply, Power Input 24 VDC

Power Supply PP-112/GR is a vibrator power supply providing the power from 24 VDC vehicle battery for Radio Sets GRC-3 to -8 and VRC-16 to -18.

Dimensions: 229 x 184,5 x 330. Weight:15,90 kg.

Spare Tubes: 1007 (1); 0B2 (2); 0A2 (2).
Spare Parts: Fuse AGU 5 Amp. (3); Fuse AGU 3 Amp. (1); Thermal Relay K-1,  K-2 (1); Ballast Tube R-24, 25, 31, 37, 38, 40 (3); Vibrator 24 Volt E-1, 2, 3 (3).

Technical Manual TM 5036 -TM 11-611

RT-68/GRC tranceiver for mobile purposes, is a part of AN/GRC-7 and AN/GRC-8 radio sets. 38-55 MHz continous 170 channels or two presets in 100 kHz steps, FM. Output power 2 watts (LO) or 15 watts (HI), 27 tubes. Needs power supply PP-109 or PP-112. Mainly used in tanks like M88. Different manufacturers, also made in Germany by SEL. 

There are 12 crystals to choose. The right big tuning knob serves a VFO to tune the desired signal within 1 MHz. After 2 variable IF stages, a second oscillator stage and second mixer stage bring the signal to a second IF of 1400 kHz, followed by 2 IF limiter stages, and a FM-discrimator with 2 valve-diodes 1A3.

Dimensions: 229 x 287 x 330, 15,90 kg (42 lbs)

Spare Tubes: 1A3 (2); 1AE4 (2); 1L4 (2); 1R5 (4); 1S5 (1); 1U4 (6); 2E24 (3); 3A4 (1); 3A5 (5); 3B4(2); 3Q4 (6); 6AK5 (2)

Identical shape are RT-66 (20-28 Mhz) and RT- 67 (27-39 Mhz).

Technical Manual: TM-11-289

Is a receiver with continuous tuning from 27 to 39.0 MHz FM, or three presets, FM single conversion, simple conversion superheterodyne circuit and frequency modulation, super heterodyne, 15 tubes inside, channel spacing 100 KHz.
Uses 135 Volt dc and 6 Volt dc, Current drain 4 Amp.

Dimensions: 229 x 184,5 x 330. Weight: 15,90 kg.

Spare Tubes: 1007 (1); 0B2 (2); 0A2 (2).
Spare Parts: Fuse AGU 5 Amp. (2); Fuse AGU 10 Amp. (2); Thermal Relay K-1,  K-2 (1); Ballast Tube R-24, 25, 31, 37, 38, 40 (2); Vibrator 6 Volt E-1, 2, 3 (3).

Power supplied via the power inside the receiver 12 VDC (PP-281 GRC) 24V (PP-282 GRC) RT 66.

Identical shape of RX R 108 (20-27.9 Mhz) and R 110 (38-55.0 Mhz)