1N21

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Voltage 1.0 Volt peak inverse; amp rating 15mA continuous; base unique cartridge-style brass and ceramic microwave body shell layout; historic point-contact germanium crystal detec tor and S-band mixer diode. Equivalents: Sylvania 1N21, Raytheon 1N21, Philco 1N21. Real-Life Examples: World War II-era tactical airborne radar receivers, vintage microwave signal test sets, and classic ham radio envelope detectors. Show more