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4102D

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ID = 28978
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Triode, vacuum   Audio Frequency 
Identical to 4102D = CV1640 = 209A = 209A_Wecoltd = SY4102D = 102DW = VT32B = VT32
Similar Tubes
Normally replaceable-slightly different:
  102D ; 102F ; 102G ; 3A/142A ; 3A/142AY ; 4102E
Heater different:
  4020A
Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Filament Vf 2 Volts / If 1 Ampere / Direct / Battery =
Description Tyne quotes the filament current as 0.25A for this tube. 
Tube prices 1 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   page 367-369
4102d_sockel.gif 4102D: RTT 10. Auflage
Gerhard Eisenbarth

Just Qvigstad 		4102d_kenn_1.png
4102D: Herstellerunterlagen
Gerhard Eisenbarth
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Collection of

Antonio Varrica (I)
Giuseppe Antonio Tusini (I)
Gerhard Eisenbarth (D)
Nikolaus Löwe (D)
Klaus Neumann (D)
 
4102d.jpg

4102D
 
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