Vol. 4, No. 6

Volume 4, Number 6

Volume 4, Number 6

On the Cover

In this issue
  • The Condor Radio Valve
  • Old-Time Data on Navy Tubes
  • The Milkotron – Another DeForest Invention?
  • More on the Tube Flash and Heaters
  • Collector Profile: Bigger Than Average
  • The Long-Ignored Compactron
  • Mrs. K’s Lost Tubes

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