Vol. 6, No. 4

April 18, 2023July 19, 2024By 52
Volume 6, Number 4
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Volume 6, Number 4

On the Cover

The Eimac X272 developmental tetrode from 1944 – a 4-125A with three radial pins added to reduce lead inductance.

In this issue
  • TCA Special Publications
  • Eimac Introduces the 4-125A
  • W. E. Broadcast Gear – From Turntables to Tubes
  • Pushuing the (Tube) Envelope
  • The Tube That Jack Built
  • Anton and Amperex
  • Eimac and Gammatrons

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