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ID = 8509
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  SEMICONDUCTOR, general   Frequency converter 
Identical to 1N21
Similar Tubes
Normally replaceable-slightly different:
  1N21B ; TH8021B
Other characteristic (electr. data):
  1N21A ; 1N21C

Base No base
Was used by Radar

Silicon, point-contact mixer diode, NF 16.4dB at 3GHz.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
7 x 22 x mm / 0.28 x 0.87 x inch
Weight 2 g / 0.07 oz
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)   KTT 1969/70

1n21pin_4.png 1N21: Manufacturer's Literature
Emilio Ciardiello

Usage in Models 1= 1942?? ; 1= 1949 ; 1= 1953??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

Collection of



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