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H412

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ID = 14269
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Triode, vacuum 
Identical to H412
Similar Tubes
Normally replaceable-slightly different:
  A4 ; A409 ; H406
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
h412_01.jpg
H412: Collection TL
Thomas Lebeth

 
1_69.png
H412: Telefunken Werkstattbuch
Wolfgang Bauer

 
triotron_1_2.png
H412: Triotron Röhrenkatalog von 1942
Wolfgang Bauer


Usage in Models 1= 1928?

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


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