OA 91, Tube OA91; Röhre OA 91 ID34052, Solid-State-Diode
Peak Electronic Design Ltd 💙 Twitterissä: "The OA91 is actually my favourite germanium diode (built my very first crystal set with one). I must have one somewhere here at Peaky HQ....… https://t.co/b79mP6zpZ9"
Field Strength Meter (FSM) using OA91 Diode
OA91 DIODE Datasheet pdf - GERMANIUM DIODE. Equivalent, Catalog