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ID = 16566
Brand: Siemens; D (S.& Halske / S. Electrogeräte)
Tube type:  Triode, vacuum   Audio Frequency 
  <1925 rare.
Identical to VS27

Base Top contact screw type.
Filament Vf 10 Volts / If 3 Ampere / Direct
Description Siemens & Halske's earliest developments were based on the results attained with some special double-grid tubes which had been evolved during World War I. The triode VS27 was the progenitor of the tubes development for telephone use in the postwar era. The intricate glass structure used to position and support the electrode system in this tube is a tribute to German glassworkers. It provides the ultimate in stable electrode systems. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Saga of the Vacuum Tube, Tyne   page 431. 432
VS27: Elektronenr Kennl u Daten - Gehrts 1927
Trev Levick

VS27: Elektronenr Kennl u Daten - Gehrts 1927
Trev Levick

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