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S407

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ID = 12975
       
Country:
Hungary
Brand: Tungsram; Budapest (see also British T.)
Tube type:  Screen-grid Tetrode 
Identical to S407
Similar Tubes
Normally replaceable-slightly different:
  A2004 ; L409 ; S4

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er)
Filament Vf 4 Volts / If 0.07 Ampere
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
s407_sock.png
S407: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

More ...
 
s407_tungsram_1928.gif
S407: Tungsram Katalog 1928
Franck Faure


from Just Qvigstad

Usage in Models 1= 1931? ; 1= 1933

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

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