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1C7

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ID = 3949
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  HEPTODE   Controlling (mu) 
Identical to 1C7
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ut)
Filament Vf 2 Volts / If 0.12 Ampere
Information source Taschenbuch zum Röhren-Codex 1948/49   
1c7.png
1C7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
413_2.png 1C7: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		1c7_spec.png
1C7: Grundig Rö-Tabu, zum M1, Band 3, 1948
Anonymous 15 Collector
Usage in Models 2= 1937? ; 5= 1937 ; 1= 1938? ; 1= 1938 ; 1= 1939 ; 2= 1940?? ; 1= 1946 ; 1= 1947? ; 2= 1948 ; 1= 1949
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):17
 
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