R-105D, R-108D, R-109D ("Astra-3", "Astra-2", "Astra-1") - Soviet military wearable ultra-short-wave radio stations .
Intended for work in company radio networks . On the equipment of the Armed Forces of the USSR since 1952 . They differ only in the range of operating frequencies. The prototype radio stations "Astra" was developed in the late 1940s at the Scientific Research and Testing Institute for Communications of the Ground Forces (NIIIS SV) as a replacement for radio stations of the A-7 series. For the first time in the USSR, “Astra” implemented a search-free, no-tuning communication. The R-108D and R-109D radio stations operated in the amateur band 28.0-29.7 MHz and were used in DOSAAF radio clubs, in particular, as transmitters in fox hunting competitions. The four-section block of variable-capacity capacitors from Astra stations was used in the popular UW3DI transceiver , so decommissioned radio stations were highly valued by shortwave drivers .
Specifications
Knapsack radio stations, simplex, assembled according to the transceiver scheme on L-series lamps (“local”, that is, with eight hard contact pins and a key with a latch for fixing in the socket. The glass tubes of the lamps have an aluminum casing. See Radio tubes made in the USSR / Russia ) . The receiving part is a superheterodyne with one frequency conversion. Remote control and operation as a repeater in radio networks are provided.
- Operating mode: telephony with frequency modulation
- The setting is smooth, the scale is graduated in steps of 50 kHz
- Frequency range:
- R-105D - 36.0-46.1 MHz (used in motorized rifle and tank troops )
- R-108D - 28.0-36.5 MHz (used in artillery)
- R-109D - 21.5-28.5 MHz (used in the air defense forces )
- The sensitivity of the receiver is not worse than 1.5 μV at a signal to noise ratio of 10: 1
- Transmitter Output Power - 1 W
- Power source: two nickel-cadmium batteries 2NKN-24 or 2KN-32 with a total voltage of 4.8 V. The power supply to the anode circuits is from the built-in vibration transducer .
- Continuous operation time with a reception / transmission ratio of 3: 1 - from 12 to 17.5 hours, depending on the type of battery
- Antenna devices:
- flexible whip antenna 1.5 m high ( Kulikov pin ) with additional elbows for extension up to 2.7 m, bracket for fastening on board the vehicle and counterweights
- 40 m long beam antenna for stationary operation
- Range of reliable communication between stations of the same type:
- when using a short whip antenna - up to 10 km
- when using more complex antennas - up to 30-40 km
- Operating temperature range - −40 to +50 ° C
- Transceiver dimensions, no more: 365 × 385 × 230 mm
- The mass of the working set, no more: 21 kg
- Mass of a complete set with a packing box, no more: 46 kg
Literature
- Radio stations R-105d, R-108d, R-109d. Technical description and operating instructions IP0.005.031. TOI, 1966
- B. Fedotov. VHF radio station. // "Radio", No. 3, 1968, p. 14-16