RUP-4 Military HF radio Transceiver AN / GRC-9

Description

RUP-4 Military HF radio Transceiver AN / GRC-9
It is modeled on the American radio device
AN / GRC-9
. It fully follows its block diagram, but more modern technological solutions have been applied. Domestic electronic components, mostly manufactured in the same factory, are built into the RUP-4 device. The RUP-4 device filled the JNA infantry battalions and served as a radio link with the regiment-brigade.
Also, like the
AN / GRC-9
, the RUP-4 radio operates in the frequency range from 2MHz to 12MHz with CW and AM modulations. The output power of the transmitter is 20W and is emitted by a double tetrode QQE03 / 20. The RD-2 transmitter and the RP-2 receiver of the RUP-4 device are separate. The RD-2 transmitter is made in the technology of electron tubes of domestic production. The frequency of the transmitter was set by a variable oscillator (VFO). Unlike the transmitter, the RP-2 receiver is completely transistor (domestic germanium transistors from the Ei-Niš factory were used), which ensured lower consumption and higher sensitivity and selectivity compared to the RT-77 / GRC-9 receiver of the American station
AN / GRC-9
. Also with the receiver, the frequency was adjusted by a variable oscillator independently of the transmitter
Radio RUP-4 was used as a portable, or installed in a domestic off-road vehicle Zastava AR-55V It was then powered by a special lead-acid battery 12V / 180Ah, also mounted in the vehicle. He was "retired" at about the same time as AN / GRC-9 in the 1980s.
The device is in excellent condition, the outer box has traces of use, it is not open, you get what you see in the picture