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ID = 13787
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Triode, vacuum 
Identical to AS4
First Source (s)
Apr.1927 : Funk Bastler #14

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 =

Heizung 3,4 - 3,7V/0,06A; Sättigungsstr. 6mA; Anodenspannung 30 - 80V; Durchgriff 8%; Steilheit 0,5mA/V; Innerer Widerstand 31000Ω; Anwendung: A. O. W.;Preis 1927: 10,50ATS. Daten aus dem WEKA-Katalog 1927, Seite 169.

Information source Taschenbuch zum Röhren-Codex 1948/49   

as4_so.png AS4: rtt
Anonymous 10 Collector

Just Qvigstad
AS4: Meine Sammlung
Rudolf Osterkamp


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