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DC/HL

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ID = 18427
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Triode, vacuum   Power/Output 
Identical to DC/HL
First year 1930 -- Original prospect or advert Pye Twintriple DC4D from 1930
First Source (s)
May.1931 : Wireless World (The), London (WW, 79) p iii
Successor Tubes DC3HL  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Filament Vf 6 Volts / If 0.5 Ampere / Indirect / Specified current DC = (Series working)
Description

First British tube series for dc mains use.

Initial announcement quotes the heater voltage at 4.

Ra 13 k ohms, gm 2.7 mA/V

 
Information source Taschenbuch zum Röhren-Codex 1948/49   

b5~~15.png DC/HL: Fin Stewart
Fin Stewart


Just Qvigstad
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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