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Transmitting-Tetrode

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ID = 49362
       
Country:
Netherlands
Brand: Heussen, M. & Co; Arnhem
Developer: Heussen, M. & Co; Arnhem 
Tube type:  Transmitting Tetrode, air cooled 
  <1925 very rare. ***
Identical to Transmitting-Tetrode

Base Edison big E27 = 27 mm Base on each end.
Filament Direct
Description This experimental tube is used in the Heussen broadcast station PCUU, which operated from april 1922 until september 1924. This tube is likely used during experiments in 1922 to find out how far one could be received with only 2,5 Watts of plate dissipation. 
Dimensions (WHD)
incl. pins / tip
29 x 149 x 29 mm / 1.14 x 5.87 x 1.14 inch
Weight 102 g / 3.60 oz
 
transmittingtetrodesmall.jpg
Transmitting-Tetrode: own collection
Peter den Boer

 

from Just Qvigstad


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