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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:
  FC4

Base Europe 7-Pin C7A (Hx C, C7, C) 1933 (Codex=Leo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.6 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
o407_01.jpg
O407: Collection TL
Thomas Lebeth

 
18_2.png
O407: Telefunken Werkstattbuch
Wolfgang Bauer

 

Usage in Models 1= 1934

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


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