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FER2_4Volt

Information - Help 
ID = 28567
       
Country:
Great Britain (UK)
Brand: Louden Valves (tubes) - see also Fellows; London
Tube type:  Triode, vacuum   Universal 
Identical to FER2_4Volt
Similar Tubes
Heater different:
  FER2_6Volt
First year 1925 ?? Saga of the Vacuumtube, Tyne page 392
First Source (s)
1925 : British Radio Valves - The Vintage Years, Thrower p.51

Base Europe 4-Pin (A, 4A, B4, since 1914)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Description

Louden valves were marketet by Fellows Magneto Co. Ltd. in 1924 and 1925. Some Louden designations used were FE1 and FE2 for bright emitters; FER1, FER2 and 0.06 designated dull emitters having thoriated filaments.

 
Literature Saga of the Vacuumtube, Tyne   page 392
 
fer2_spec.png
FER2_4Volt: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector


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