Vol. 7, No. 6

Volume 7, Number 6

Volume 7, Number 6

On the Cover

In this issue
  • Development of Planar Triodes at Eimac/Varien, Salt Lake City, 1966-87
  • The Dowd-RCA and Perham-Eimac Archives
  • Dating Raytheon Receiving Tubes
  • Valves in the Argentine Market of the ’20s
  • Digital Glassware 11: Vacuum-type Counter Tubes

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