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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 B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
1_69.png H412: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		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

Collection of

Wolfgang Bauer (A)
Thomas Lebeth (A)
 
h412_01.jpg

H412
 
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