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DFA1

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ID = 28510
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum   Power/Output 
Identical to DFA1
Similar Tubes
Other base:
  DFA1_UV
First year 1924 Saga of the Vacuum Tube, Tyne Seite 378
First Source (s)
1924 : Saga of the Vacuum Tube, Tyne
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

Low consumption loud speaker valve.

 
Information source Saga of the Vacuum Tube, Tyne   1925 Brown Brothers Catalog 217
b4_base_pins~~89.png DFA1: Fin Stewart
Fin Stewart

Just Qvigstad 		dfa1_spec.png
DFA1: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

Collection of

Rudolf Osterkamp (D)
 
img_20130919_173050_629744246.jpg

DFA1
 
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