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ID = 20920
Brand: Longlife, the Hague
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to P2_Longlife
Similar Tubes
Normally replaceable-slightly different:
Production stop Feb.1938

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Direct

The Röhren-Codex lists this tube as a Thermion tube, but the brand is Longlife. Va = 2 x 300 Volt max, DC currrent max 60 mA. The tube in the picture is a Longlife Superior type P2.

Dimensions (WHD)
incl. pins / tip
44 x 118 x 35 mm / 1.73 x 4.65 x 1.38 inch
Weight 59 g / 2.08 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1-2-1935
P2_Longlife: Photo of tube from my collection - TS
Tomasz Szczesniak

More ...
P2_Longlife: rtt
Anonymous 10 Collector


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