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W412

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ID = 15047
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  TRIODE (Detail uncertain) 
Identical to W412 = RE034
Similar Tubes
Normally replaceable-slightly different:
  A425 ; HR406 ; W4 ; W406
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 0.06 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   

1_198.png W412: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 1= 1928?

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

Collection of

Collection of a member from D
 
w412.jpg

W412
 

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