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DC/Pen

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ID = 11144
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Vacuum Pentode   Power/Output 
Identical to DC/Pen
First year 07.Jan.1931 The Wireless World, London (WW, 79) New Series abnnounced p5
First Source (s)
Jan.1931 : The Wireless World, London (WW, 79) p iii

Base Europe 5-Pin (O5A, B5) Sidecontact
Filament Vf 8 Volts / If 0.5 Ampere / Indirect / Series, DC
Description First British tube series for dc mains use.

gm 2.5mA/V
Price 1.4 GBP in 1931 

Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
dcpenc.jpg
DC/Pen: From my own collection
Gerry Howe

 

Usage in Models 1= 1930

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1


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