Radio-teleprinteristi JNA - Radio-teleprinterski sistem RTpS-400
Terrain car Pinzgauer 710K
Terrain car Jep Willys CJ-3B
Terrain car Dodge WC51
Terrain car Zastava AR-55
Terrain truck TAM-5000D
 
Radioteletype station R-140
 
Mobile radio stations are made usually from two or more devices built in the terrain vehicle. In the Yugoslav People's Army that was one or more HF radio devices, and next to it can be found VHF radio and telephone and telegraphic devices. The vehicle is equipment with together source of powering on (batteries, electric aggregate, or both) and with other equipment necessary for inter links. By the chiefly HF radio device, radio station was usuallygetting the name. For example: Radio reception hall 4xRP-4 (four HF Radio receivers RP-4 built on the terrain truck TAM-5000), Radioteletype station RTpS-100 (HF Radioteletype device RTU-100 built in the vehicle Zastava AR-55 or Pinzgauer 710K).

In the Yugoslav People's Army radioteletype devices are HF radio devices middle and high power, in which are beside standard type of operation : CW, AM, SSB and FM , enabled also RTTY (radioteletype telegraphy) operation. This was the basic form of radio links between the higher military units.

RTTY telegraphy is the exchange of information with teleprinter through radio device. Because teleprinter operates with DC impulses is needed to transform it in the suitable alternate power forms, and then introduced it in modulator of transmitter. This is done with a special device called telegraphic modem (see Telegraphic modem TG-2). In the telegraphic generator is used FSK (Frequency Shift Keying) method where power impulses and impulses without power are turning into two AC signals - tons (In Yugoslav Army was used 1125 Hz and 1425 Hz).



Summary Info for Mobile Radio Stations
 
MARK RADIO STATION
RADIO SET TYPE
FREQUENCY RANGE
MODE
POWER OUT
ORIGIN
 
BC-191 HF transmitter
1.5 - 12,5 MHz
CW, AM
50W United States
BC-312-N HF receiver
1.5 - 18 MHz
CW, AM
- United States
 
transceiver PD-6
2 - 12MHz
CW, AM, SSB, RTTY
120W ex Yugoslavia
 
RU-2/1 VHF radio set
30 - 69.95MHz
FM
1.4W ex Yugoslavia
  R-140 HF transmitter 1.5 - 29,9999MHz CW, AM, DSB, RTTY 1000W ex Soviet Union
R-155P HF radio receiver 1.5 - 29,9999MHz CW, AM, DSB, RTTY   ex Soviet Union
R-311 HF radio receiver 1 - 15MHz CW, AM   ex Soviet Union
R-105 VHF radio set 36 - 46.1MHz FM 1W ex Soviet Union
R-405P-T1 radio relay 390 - 420MHz FM 1,5W ex Soviet Union
  TX: PB-110, LP-123 1.6 - 29,9999 MHz
Tx/Rx: CW, MCW, AM, SSB, DSB, RTTY
1000W ex Yugoslavia
RX: RP-150 0,25 - 29,9999 MHz   ex Yugoslavia
  R-112 HF Tank radio set 2.8 - 4.99MHz CW, AM 90W ex Soviet Union
R-123 VHF Tank radio set 20 - 51.5MHz FM 20W ex Soviet Union
  R-105 (105U) radio set 36 - 46.1MHz FM 1W (50W) ex Soviet Union
R-113 HF Tank radio set 20 - 22.375MHz FM 16W ex Soviet Union
R-112 HF Tank radio set 2.8 - 4.99MHz CW, AM 90W ex Soviet Union
R-311 HF radio receiver 1 - 15MHz CW, AM   ex Soviet Union
 
Descriptions of Mobile Radio Stations

SCR-193 Radio Station

Radio station SCR-193 Yugoslav Army has got in package of military help that was provided by United States after outbreak of political conflict between Yugoslavia and the Soviet Union in 1948. It is interesting to say that about this help has not been written a lot in Yugoslav, Europe and United States, because that was a military secret. The fact is that the United States then helped Yugoslavia with arms and equipment (hunting aircrafts, Sherman tanks, vehicles and other weapons). Then the Yugoslav Army was equipped with United States devices of connections. After this help Yugoslav Army was better armed from some countries of NATO, which was a unique example during the Cold War for the Army of socialist state.

Radio station SCR-193Radio station SCR-193 had HF transmitter BC-191, HF receiver BC-312-N or BC-348, AN-24A antenna or type AT-5, the power sources for electric-aggregate "ONAN" which gave the output voltage of 24V DC and two lead batteries 12V/135Ah, box for transport with the appropriate elements for the assembly, two Yugoslav field cable type PTK-56 and other accessories.

In the radio station SCR-193, transmitter BC-191 and receiver BC-312-N were powering on with voltage from 12 VDC to 14 VDC from a common lead batteries over Dinamo converter BD-77. Station was set in vehicle type "Zastava AR-55-V" 4x4 0.5 T built in the car factory "Zastava" in Kragujevac (ex Yugoslavia) by the Italian license, and electro-aggregate, lead batteries, field cables PTK-56 and other parts of the set in the trailer type "Zastava D-2V" of 0.5 T.

HF radio transmitter BC-191HF radio transmitter BC-191 was produced at the time of World War II in the United States in technology of electronic tubes. It has worked in the frequency range of 1.5 MHz to 12.5 MHz, CW and AM telephony. Output power of transmitter is 75 W for CW, 50 W for AM. Working frequency is determined by variable oscillator VFO or controlled quartz crystal oscillator, a working range is divided into six frequency areas. Frequency area is changed by changing the transmitting driver (so-called BC panels). Other panels were put in the trailer.

The device was powering on by Dinamo converters type BD-77 voltage of 12 VDC from lead batteries. Spending of radio system (transmitter and receiver) in full output force transmitting was maximum 57 A.

HF radio receiver BC-312-NHF radio receiver BC-312-N was produced in 1943. by the company "Farnsworth Television and Radio Corporation" in the United States. The receiver was covered the frequency range from 1.5 MHz to 18M Hz, and was divided into 6 areas. It enabled the reception of CW and AM signals. Receiver is made with electronic tubes type single super-heterodyne with low intermediate frequency of 470 KHz. The receiver was powering on through the dynamo voltage converter from 12 VDC to 14 VDC from lead batteries.

Technical Specification: Frequency Range: TX BC-191 from 1.5 MHz to 12.5 MHz - RX BC-312-N from 1.5 MHz to 18 MHz; Modes of Operation: CW and AM telephony; Output power of transmitter: 50 - 75 W; Power Requirements: 12 - 14 VDC voltage; Origin: United States.

 
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