Vol. 5, No. 2

April 18, 2023March 19, 2024By 26
Volume 5, Number 2
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Volume 5, Number 2

On the Cover

The Moorhead vertical-anode version or the British “R” valve of WW1

In this issue
  • Moorhead and His Tubes
  • British Valve Nomenclature: Brimar
  • U.S. Tubemakers Today

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