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1F7G

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ID = 2809
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Diode-Pentode   Audio Frequency 
Identical to 1F7G = 1F7M
Similar Tubes
Normally replaceable-slightly different:
  1F7GV ; CV770
Other base and data slightly different:
  1F6
First Source (s)
14.Apr.1936 : Electron Tube Registration List
Predecessor Tubes 1F6  
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uq)
Filament Vf 2 Volts / If 0.06 Ampere / Direct / Battery =
Description Glass octal type used as combined detector, amplifier, and avc tube in battery-operated receivers. Filament 2 volts,0.06 amperes. This type is similar electrically to type 1F6, except for interelectrode capacitances. Typical operation of pentode unit as class A amplifier. 
Tube prices 2 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
1f7gbasediagram.png 1F7G: 1F7G RCA Data Sheet 1947
Vitor Oliveira

Just Qvigstad 		1f7_spec.png
1F7G: Grundig Rö-Tabu, zum M1, Band 3, 1948
Anonymous 15 Collector
More ...
Usage in Models 10= 1936 ; 6= 1937?? ; 4= 1937? ; 58= 1937 ; 5= 1938?? ; 10= 1938? ; 55= 1938 ; 6= 1939? ; 51= 1939 ; 2= 1940? ; 11= 1940 ; 2= 1941? ; 6= 1941 ; 4= 1942? ; 1= 1945?? ; 2= 1946 ; 1= 1947??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):234

Collection of

Peter Pfeiffer (D)
Collection of a member from FIN
Vitor Oliveira (P)
Nikolaj Baranov (LV)
Antonio Rabitti (BR)
Tor Steinnes (N)
 
1f7g.jpg

1F7G
 
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