Alpinist 321 Shema · Works 100%

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 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.

Портативный радиоприёмник ''Альпинист-321''. alpinist 321 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

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 unit is highly portable at 850g and

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.

The board includes several trimmers for fine-tuning, such as R18 for detector mode, R22 for symmetry, and R26 for quiescent current adjustment. The (later renamed Alpinist RP-321 under new GOST

The Alpinist 321 schematic reveals a classic superheterodyne architecture typical of late-Soviet consumer electronics: