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B_Ediswan

Information - Aide 
ID = 66890
       
Pays:
Royaume Uni
Fabricant: Ediswan, Siemens Edison Swan Electric Co.; London
Concepteur: Ediswan, Siemens Edison Swan Electric Co.; London 
Type:  Triode, vacuum   Power/Output 
  <1925 très rare
Identique à B_Ediswan

Culot Europe 4-Pin B4 (Eu A, E, 4A) 1914
Utilisé par Militaire et/ou Services Publics
Chauffage Vf 6 Volt / If 0.86 Ampère / Direct / Battery =
Description

Tube designed for the British Royal Air Force and made in 1917-1918. Elements are similar in appearance to the R type, mounted horizontally. Base is nickel plated brass. Before the Air Force settled on the VR and VT designation, five known types used the single letter -- A, B, C, D and F.

 
Bibliographie British Radio Valves - The Vintage Years: 1904-1925   Page 132

b4_base_pins~~31.png B_Ediswan: Fin Stewart
Fin Stewart


Just Qvigstad
 

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