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4D21

Information - Help 
ID = 21348
       
Country:
United States of America (USA)
Brand:
Tube type:  Transmitting Tetrode, air cooled 
Identical to 4D21 = 4-125A = CV2963 = PL-4D21 = E125A
Similar Tubes
Normally replaceable-slightly different:
  6155

Base TRANSMITTER-Base in gneral Top contact with a cap
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 6.5 Ampere / Direct / Parallel, (AC/DC)
Description

5-pin jumbo base.

 
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
4d21_4_125a_eimac.jpg
4D21: My tubes
Anonymous 413 Collector

 
4d21_sock.png
4D21: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 
4d21_dat1.png
4D21: RCA Transm. Tubes 1956
Otto Frosinn



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