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7X7/XXFM

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ID = 5138
       
 
   
Tube type:  Double Diode-Triode 
Identical to 7X7/XXFM = 7X7

Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect
Information source Essential Characteristics, GE 1973   

8bz_1.png 7X7/XXFM
Emilio Ciardiello

 

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