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ID = 20563
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Amperex; New York 
Tube type:  Double Triode   Universal 
Identical to 7308 = CV4108 = E188CC
Similar Tubes
Multiple differences or of other kind:
  6922 ; 6922WA
First Source (s)
27.Jun.1960 : Electron Tube Registration List 2858
Predecessor Tubes 6922  

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 6.3 Volts / If 0.335 Ampere / Indirect / Specified voltage AC/DC
Description Premium variant of 6922. Low microphonics, 10.000-hr life; heater current increased to 335mA 
Tube prices 4 Tube prices (visible for members only)
Information source Röhren-Taschen-Tabelle, (Franzis RTT)   
- - Manufacturers Literature   
Tube Lore (I)

no53_g.gif 7308: RTT Schwandt
Günther Stabe † 19.8.20

Just Qvigstad
7308: Siemens Röhrentaschenbuch 1972
Anonymous 10 Collector

Usage in Models 2= 1960?? ; 1= 1963

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

Collection of

Collection of a member from FIN


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