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DFA4

Information - Help 
ID = 30713
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Developer: Mullard Radio Valve Co. Ltd.;  
Tube type:  Triode, vacuum   Power/Output 
Identical to DFA4
Similar Tubes
Other base:
  DFA4_UV
First Source (s)
1925 : 1925 Brown Brothers Catalog 217

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 5.5 Volts / If 0.2 Ampere / Direct / Battery =
Description

Power valve for resistance capacity coupled amplifier.

 
Information source Wireless World (The), London (WW, 79)   September 30 1925
British Radio Valves - The Vintage Years: 1904-1925

b4_base_pins~~92.png DFA4: Fin Stewart
Fin Stewart


Just Qvigstad
dfa4_spec.png
DFA4: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

 

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