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399A

Information - Help 
ID = 35417
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Vacuum Pentode 
Identical to 399A
Similar Tubes
Heater different:
  1T4 ; 399B

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 1.15 Volts / Direct
Description Miniature pentode for telephone carrier repeaters. Similar to 1T4 with different heater voltage. 
Literature Tube Lore (I)   
 
399a_so_1.png
399A: ARRL Handbook 1972
Michael Schlör

 

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