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ID = 3902
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   Controlling (mu) 
Identical to 6SD7

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uka)
Filament Vf 6.3 Volts / If 0.3 Ampere / Parallel / series AC/DC /

There is no metal tube 6SD7, see under 6SD7GT

Text in other languages (may differ)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  6SD7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
6SD7: Michael Gnaedig
Michael Gnaedig-Fischer

6SD7: Telefunken Werkstattbuch
Wolfgang Bauer


Usage in Models 1= 1940 ; 1= 1946??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):2

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