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W42

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ID = 2604
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to W42
Similar Tubes
Normally replaceable-slightly different:
  CV1183 ; NR61

Base British-7-Pin, old (M7A) (Codex=Nf) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.6 Ampere / Indirect
Description

Tube listed in "History of the British Radio Valve to 1940" and "The Saga of Marconi Osram Valve" shows heater current at 1 amp. Others show .6 amp.

 
Information source The Saga of Marconi Osram Valve   p. 302 & 335
History of the British Radio Valve to 1940   p. 142 & 196
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

159_21.png W42: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
osram_1936_page_030.png
W42: Osram Valves, Radio season 1936-1937
Dirk Bladt

More ...
Usage in Models 1= 1936 ; 1= 1937? ; 17= 1937 ; 1= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):20

Collection of

 
comp_radiomuseum005.jpg

 

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