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1F7

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ID = 3951
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Diode-Pentode   Audio Frequency 
Identical to 1F7

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uq)
Filament Vf 2 Volts / If 0.06 Ampere / Direct / Battery =
Description There is no metal tube 1F7, see under 1F7G 
Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   

1f7.png
1F7: Mia raccolta schemi.
Pier Antonio Aluffi

391.png 1F7: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 1= 1937? ; 3= 1937 ; 1= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5
 

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