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12SN7

Information - Help 
ID = 15127
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Triode   Audio Frequency 
Identical to 12SN7 = 12SN7GT

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk)
Filament Vf 13 Volts / If 0.3 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Description

According to the nomenclature, an octal tube without a suffix as -G, -GT, etc. would presume a metal version of this tube, which does not exist.

See under 12SN7GT.

 
Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   
  12sn7.png
  12SN7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
12sn7_sockel.jpg
12SN7: eigenes Foto von Joachim Röhling
Joachim Röhling

 
344_3.png
12SN7: Telefunken Werkstattbuch
Wolfgang Bauer

 

from Just Qvigstad

Usage in Models 1= 1940 ; 1= 1942? ; 5= 1948? ; 1= 1948 ; 2= 1949? ; 2= 1949 ; 7= 1950? ; 2= 1950 ; 2= 1952?? ; 1= 1953 ; 1= 1954 ; 1= 1959? ; 1= 1960?? ; 1= 1962??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):28


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