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R406

Information - Help 
ID = 2568
       
Country:
Hungary
Brand: Tungsram; Budapest (see also British T.)
Tube type:  Triode, vacuum   RF/IF-Stage 
Identical to R406
Similar Tubes
Normally replaceable-slightly different:
  W420
First Source (s)
21.Jun.1929 : Radio-Expres, Netherlands

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Description gm=1.4, Ra=18k 
Literature Radio-Expres, Netherlands   
Taschenbuch zum Röhren-Codex 1948/49   
 
r406.jpeg
R406: Photo of tube from my collection - TS
Tomasz Szczesniak

 
r406_sock.png
R406: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
r406_spec.png
R406: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 1= 1928?? ; 2= 1928 ; 1= 1929 ; 1= 1930

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5


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