R-109
R-109D "Astra-1" , also R-109M , is the name of a backpack radio device developed in the Soviet Union from the Astra series, which includes the R-105 , R-108 and R-109 devices . The R-109D was specially developed for the needs of air defense troops (frequency range: 18.5–21.5 MHz) and was introduced around 1952. The prototype Astra was developed in the late 1940s and replaced the outdated A-7 radios. The Astra series was replaced by obsolescence in 1962 with the introduction of the R-107 series .
technical description
- R-109D / M - 21.5–28.5 MHz (use of troops: air defense troops)
Technical specifications
| R-109D | R-109M | comment | |
|---|---|---|---|
| Frequency range | 21.5-28.5 MHz | HF troop radio | |
| Operating mode | Telephone with frequency modulation | ||
| Tunable | 50 kHz channel grid | ||
| Input sensitivity (receiver) | 1.5 µV | with a signal-to-noise ratio of 10: 1 | |
| Transmission power | 1 w | ||
| Power supply for NiCd batteries | 2 × 2NK24 | 4 × NK14 | Nominal voltage: 4.8 volts; Anode voltage: via chopper-converter (device-internal) |
| Operating time (1 set of batteries) | 12h | with a send / receive ratio of 1: 3 | |
| Range | Radio operation with radio devices of the same type | ||
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| Temperature range, ° C | −40 to +50 | ||
| Dimensions, mm | 365 × 385 × 230 | 310 × 325 × 170 | |
| Weight | 21 kg | ready to work | |
| 46 kg | with transport box | ||
The UM-2 power amplifier can be connected to increase the range. Built in the same housing as the R-109D, it has a transmission power of 10 watts .
literature
- Handbook for the radio operator. 4th edition, Military Publishing House of the GDR, Berlin 1981 (License No. 5 LSV: 0575), Part 3, Radio Equipment, Item 3.1 Radio Equipment R-109D / R-109M, pp. 528-538.