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Information - Help 
ID = 35124
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  SEMICONDUCTOR, general   Frequency converter 
Identical to 1N28 = D-168030
Similar Tubes
Normally replaceable-slightly different:
  1N21A ; 1N21B

Base No base
Was used by Radar
Filament Solid State

Silicon point-contact mixer diode, ceramic cartridge; NF 13.2dB at 3GHz.

Burnout-resistant variant of 1N21

Dimensions (WHD)
incl. pins / tip
8 x 22 x mm / 0.31 x 0.87 x inch
Weight 2 g / 0.07 oz
Information source Tube Lore (I)   
1N28: Private collection
Emilio Ciardiello

1N28: KTT 1969/70
Günther Stabe † 19.8.20


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