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Pen231

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ID = 11472
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: Mazda = Valve (Tube) brand GB (see also France) 
Tube type:  Vacuum Pentode   Power/Output 
Identical to Pen231

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 =
Information source History of the British Radio Valve to 1940   p. 148 & 186
- - Manufacturers Literature   1937
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

606_18.png Pen231: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
pen231_220.png
Pen231: own collection
Peter den Boer

Usage in Models 6= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6

Collection of

 
gb_mazda_pen231.jpg

Pen231
 

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