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W704

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ID = 16604
       
Country:
Netherlands
Brand: Longlife, the Hague
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to W704
Similar Tubes
Normally replaceable-slightly different:
  25/450 ; F704
Other base:
  F704_UX4 ; UX250
Production stop Feb.1938

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct / Specified voltage AC/DC
Description

The "Röhren-codex" lists this tube as a Thermion tube, but the brand is Longlife.

 
Information source L'ABCDaire des lampes de TSF des jeunes années   p. 74
- - Manufacturers Literature   Sept. 1935
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
Taschenbuch zum Röhren-Codex 1948/49

f704_so~~1.png W704: rtt
Anonymous 10 Collector


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