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O407

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ID = 9337
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  OCTODE   Frequency converter   Controlling (mu) 
Identical to O407
Similar Tubes
Normally replaceable-slightly different:
  AK1 ; FC4 ; VO4

Base Europe 7-Pin C7A (Hx C, C7, C) 1933 (Codex=Leo) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.6 Ampere / Indirect / Specified voltage AC/DC
Description

Grid from top cap.

 
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 251, p. 552
Taschenbuch zum Röhren-Codex 1948/49   

18_2.png O407: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 1= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

 
o407_01.jpg

 

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