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ID = 37950
United States of America (USA)
Brand: Philco, Philadelphia Stg. Batt. Co.; USA
Tube type:  Transistor   Power/Output 
Identical to 2N2431 = 121-373
Similar Tubes
Normally replaceable-slightly different:
  AC128 ; AC153 ; AC188 ; AC193

Base Wires
Filament Solid State

PNP germanium alloy transistor intended as AF low power amplifier.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
6 x 10 x mm / 0.24 x 0.39 x inch
Weight 2 g / 0.07 oz
Information source
  2N2431: Sams Photofact Folders Date 5-65, Set 754, Folder 9
Egon Penker
2N2431: Peter Langer
Günther Stabe † 19.8.20

2N2431: TVT 73
Günther Stabe † 19.8.20


Usage in Models 1= 1962 ; 2= 1964? ; 1= 1964 ; 5= 1965?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):9

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