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8438

Information - Help 
ID = 21397
       
 
   
Tube type:  Beam Power Tube   beam power 
Identical to 8438 = 4-400A = QB4/1100GA = CV3879
Similar Tubes
Normally replaceable-slightly different:
  6775

Base SPECIAL TUBEBASE in general
Filament Vf 5 Volts / If 14.1 Ampere / Direct
Information source - - Manufacturers Literature   Valvo, Senderöhren, 1983
 
amperex_8438.jpg
8438: O.F.
Otto Frosinn

 
8438_sock.png
8438: Valvo,Senderöhren, 1983
Anonymous 15 Collector

 
8438_spec_1.png
8438: Valvo,Senderöhren, 1983
Anonymous 15 Collector



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