Alpinist 321 Shema Apr 2026

The unit is highly portable at 850g and can be powered by four A-343 battery elements or via an external 9V power supply. Circuitry & Schematic (Shema)

The (later renamed Alpinist RP-321 under new GOST standards in 1987) is a portable Soviet-era superheterodyne radio receiver produced by the Voronezh Polus enterprise starting in 1986. Technical Review & Performance alpinist 321 shema

The Alpinist 321 was designed as a "3rd class" portable receiver, prioritizing reliable reception in the Long Wave (LW) and Medium Wave (MW) bands over high-fidelity audio. The unit is highly portable at 850g and

The design utilizes common Soviet transistors like the KT315 and KT361 for signal processing, and KT814/815/816/817 for the power amplification stages. The design utilizes common Soviet transistors like the

The output power is rated at 500 mW nominal (800 mW maximum), driving a frequency range of 200–3550 Hz . This makes it suitable for speech and news broadcasts rather than music.

It features a dual-band design covering LW (148.5–283.5 kHz) and MW (526.5–1606.5 kHz) . Using its internal magnetic antenna, it achieves a sensitivity of 1.5 mV/m on LW and 0.7 mV/m on MW, with a selectivity of 30 dB.