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5A/128B

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ID = 65442
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  Vacuum Pentode   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to 5A/128B
Similar Tubes
Normally replaceable-slightly different:
  4046A ; CV244 ; VT122_GPO

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact with a cap.
Was used by Technology / Measurement
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AND current AC/DC
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Page 216


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