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ID = 51952
Brand: Bal-Tubes (Pope and Philips made); Breda
Developer: Bal-Tubes (Pope and Philips made); Breda 
Tube type:  Triode, vacuum 
  <1925 very rare. ***
Identical to Transmitter1

Base Edison medium E14 = 14 mm, mignon
Filament Vf 12 Volts / If 2 Ampere / Direct / Battery =
Description This tube is made by Pope and used in the Avia receiver/transmitters. 
Dimensions (WHD)
incl. pins / tip
33 x 165 x mm / 1.30 x 6.50 x inch
Information source Radio-Nieuws, Netherlands (RN, 78)   1-6-1919
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Transmitter1: Philips Museum eindhoven
Peter den Boer


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