Vol. 7, No. 3

April 18, 2023July 19, 2024By 67
Volume 7, Number 3
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Volume 7, Number 3

On the Covers

Two halves of a composite four-tube photo, from the De Forest Radio Co. A 10-1/2 X 19-1/2 print of this image turned up in the recent Boyer Estate auction conducted by the CC-AWA group. This is quasi-historic stuff: spired article in Raadio News, May, 1930.

In this issue
  • The 1AP5, Offspring of the 913 (“sort of”)
  • Philco and the PenDD61
  • Standard Electric Argentina
  • Results – Boyer Estate Auction
  • Type Codes – Varien Tubes
  • Date Code for Bell Labs Tubes
  • Marathon Tubess and Their Telegraphic Codes
  • “The Tube Collector” (Radio News)
  • A Look at Hitachi Receiving Tubes
  • The 2E27 – An Existence Proof?

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