A NOS Western Electric 1N21 Crystal diode/mixer from 1942, packed in a lead casing. These were used in radar installations duri… | Diode, Crystals, Floating shelves
5 x NOS NIB 1N21 Sylvania Vintage Microwave Mixer Diodes | eBay
Antique Radio Forums • View topic - Xtal radio detector diodes- source?
HF Mischer m 2 x 1N21 Diode Richt Koppler Richtkoppler Electronic Components & Semiconductors clacoaching Other Electronic Components