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1F7GV

Information - Help 
ID = 4148
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Diode-Pentode   RF/IF-Stage 
Identical to 1F7GV = CV770
Similar Tubes
Normally replaceable-slightly different:
  1F7G

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uq)
Filament Vf 2 Volts / If 0.06 Ampere / Direct / Battery =
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
 
1f7g_168r.jpg
1F7GV: Collection JR
Jacob Roschy

 
1f7gv_so.png
1F7GV: ARRL Handbook 1972
Michael Schlör

 

Usage in Models 4= 1937 ; 1= 1938? ; 14= 1938 ; 7= 1939 ; 5= 1940 ; 12= 1941

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):43


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