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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 1930 -- Original prospect or advert Pye Twintriple DC4D from 1930
First Source (s)
Jan.1931 : Wireless World (The), London (WW, 79) p iii

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Sidecontact.
Filament Vf 8 Volts / If 0.5 Ampere / Indirect / Specified current DC = (Series working)
Description

First British tube series for dc mains use.

gm 2.5mA/V
Price 1.4 GBP in 1931

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   


Just Qvigstad
Usage in Models 1= 1930

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

Collection of

 
dcpenc.jpg

DC/Pen
 

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