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FER1_4Volt

Información - Ayuda 
ID = 28566
       
País:
Gran Bretaña (GB)
Marca: Louden Valve (Brand), Fellows Magneto Co. Ltd.; London
Diseñador: Louden Valve (Brand), Fellows Magneto Co. Ltd.; London 
Tipo:  Triode, vacuum   Audio Frequency 
Idéntica a FER1_4Volt
Válvulas similares
Heater different:
  FER1_6Volt
Primera serie 1925 ?? Saga of the Vacuum Tube, Tyne page 392
Fuente principal (es)
1925 : British Radio Valves - The Vintage Years: 1904-1925 p.51 & 158
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Usada en Radio/TV-reception etc.
Filamento Vf 4 Volt / If 0.1 Ampere / Direct / Battery =
Descripción

Louden valves were marketed by Fellows Magneto Co. Ltd. from 1924 to 1927. Some Louden designations used were F1 and F2 for bright emitters; FER1, FER2 are the corresponding dull emitter tubes having thoriated filaments.

 
Literatura Saga of the Vacuum Tube, Tyne   page 392
Wireless World (The), London (WW, 79)   June 24th 1925 p652
British Radio Valves - The Classic Years: 1926-1946
b4_base_pins~~5.png FER1_4Volt: Fin Stewart
Fin Stewart

Just Qvigstad 		fer1_spec.png
FER1_4Volt: Banneitz, TB der drahtl. Teleph. 1927
Anónimo 15 Coleccionista

Colección personal de

Gerhard Eisenbarth (D)
 
de_louden_fer_box.jpg

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