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PER1_4Volt

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ID = 80813
       
Country:
Great Britain (UK)
Brand: Louden Valves (tubes) - see also Fellows; London
Developer: Louden Valves (tubes) - see also Fellows; London 
Tube type:  Triode, vacuum   Power/Output 
Identical to PER1_4Volt
Similar Tubes
Heater different:
  PER1_6Volt
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Description

For transformer-coupled stage

Louden valves were marketed by Fellows Magneto Co. Ltd. from 1924 to 1927.

 
Information source Wireless World (The), London (WW, 79)   13 April 1927
History of the British Radio Valve to 1940   p. 147
British Radio Valves - The Classic Years: 1926-1946
b4_base_pins~~12.png PER1_4Volt: Fin Stewart
Fin Stewart

Just Qvigstad

Collection of

Robert Gillespie (USA)
 
screenshot_20211031_213734_gallery.jpg

 
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