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4101D

Information - Help 
ID = 28977
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Triode, vacuum   Power/Output 
Identical to 4101D = VT31_GPO = CV1638 = SY4101D = 208A = 101DW = 208A_Wecoltd = 101D_Wecoltd = R208-A
Similar Tubes
Normally replaceable-slightly different:
  101D ; 101DW_Wecoltd ; 4101DL
Heater different:
  4019A

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Filament Vf 4 Volts / If 1 Ampere / Direct
Description Tyne, p 369 quotes the filament current as 0.25A.
Used principally for telephony amplification by British Post Office. 
Tube prices 3 Tube prices (visible for members only)
Literature Saga of the Vacuumtube, Tyne   page 367-369
 
4101d.jpg
4101D: collection EP
Eduard Pavlik

 
4101d_so.png
4101D: ARRL Handbook 1972
Michael Schlör

 
4101d1.png
4101D: own collection
Peter den Boer



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