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M1002

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ID = 11355
       
Country:
Netherlands
Brand: Radio-Record - Röhrenmarke; Holland
Tube type:  Double Grid Power Amplifier   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to M1002
Similar Tubes
Normally replaceable-slightly different:
  PP230

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.3 Ampere / Direct / Battery =
Description

Tungsram and Radio Record used s special tetrode with penthode characteristics to avoid the Philips penthode patent.

 
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 202, p. 397
- - Manufacturers Literature   1934
Taschenbuch zum Röhren-Codex 1948/49

r_3.png M1002
Peter den Boer

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Just Qvigstad
m1002data.png
M1002: own collection
Peter den Boer

 

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