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Tonebeam

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ID = 37134
       
 
   
Tube type:  Glow Indicator (Neon)   Indication 
Identical to Tonebeam
Similar Tubes
Multiple differences or of other kind:
  Flash-O-Graph
Predecessor Tubes Tune-A-Lite  

Filament No heater
Description Atwater Kent name for this indicator . similar to Fadas Flash-O-Graph. 
Literature Rider's Perpetual, Volume 3 = 1933 and before   Atwater Kent
  tunealite_basic_schematic.png
  Tonebeam: "The Vacuum Tube" Pro. Patrick dowd, FSC, W2GK
Ernst Erb
 

Usage in Models 15= 1932 ; 6= 1933

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):21

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