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Dynatron

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ID = 45193
       
Country:
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Secondary Emission Triode 
  <1925 no serial production. For instance only development samples. *****
Identical to Dynatron
Successor Tubes Pliodynatron  
Base Side contacts.
Filament Direct / Specified voltage AC/DC
Description This tube has three electrodes:
A filamentary cathode, a helical anode at high potential and an outer cylinder called "3rd electrode" kept at a lower potential.
The secondary electrons bounced back from the 3rd electrode are collected by the anode. The Dynatron behave as a true negative resistance device.
See also Pliodynatron. 
Text in other languages (may differ)
Information source Patent   US 1 387 984
Saga of the Vacuum Tube, Tyne   p.146
dynatron_sch3.png
Dynatron: US Pat. 1387986
Wolfgang Holtmann
dynatron_drawing1.png
Dynatron: US Pat. 1387984
Wolfgang Holtmann
 
ge_dynatron.jpg

 
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