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V21M

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ID = 8342
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to V21M
Similar Tubes
Normally replaceable-slightly different:
  1802 ; D230 ; RGN354 ; V430

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.5 Ampere / Direct
Information source Röhren-Vademecum; P.H. Brans; Antwerpen   p. 94
- - Manufacturers Literature   2-9-1933
Taschenbuch zum Röhren-Codex 1948/49
Universal Vade-Mecum, Electron Valves and Semiconductor Devices

1200small_1.png V21M: own collection
Peter den Boer


Just Qvigstad
 

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