Vol. 2, No. 4

April 18, 2023July 19, 2023By 7
Volume 2, Number 4
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Volume 2, Number 4

On the Cover

Eimac X-159 developmental duel Triode.

In this issue
  • Readers Report
  • Some Raytheon History
  • Telefunken Date Codes
  • Bell Labs’ 1945 Tube program
  • The Lost D’Agostino Collection

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