Vol. 13, No. 2

Volume 13, Number 2

Inspired by February’s “Tunggram Radio” ad, Abel Santoro senrt in this advertisement, clearly from the Hungarian arm of the company, for tungsram-filament light emitting monodes.

In this issue
  • A Speculative Edison Triode
  • The Technology Conundrum
  • Brief History of the Incandescent Electric Lamp
  • Tubes RCA Made in China
  • RCA Views Telefunken 12AX7’s
  • Rejuvenation of Vacuum Tubes
  • Self-Service Tube Testers
  • “Matched Pairs”
  • The Ballest Resistor Situation
  • 1940-41 Date Codes: Ken-Rad, Sylvania, Raytheon
  • The Need for Critical Tube Testers
  • How to Get 50 Watts Out of a 5-Watt Tube

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