The board includes several trimmers for fine-tuning, such as R18 for detector mode, R22 for symmetry, and R26 for quiescent current adjustment.
Detailed alignment frequencies for the heterodyne and antenna circuits include 1630 kHz (MW) and 145 kHz (LW), with IF (Intermediate Frequency) set to 165 kHz . alpinist 321 shema
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. The board includes several trimmers for fine-tuning, such
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. such as R18 for detector mode