Vol. 6, No. 4April 18, 2023July 19, 2024By Libby50View FullscreenOn the CoverThe Eimac X272 developmental tetrode from 1944 – a 4-125A with three radial pins added to reduce lead inductance.In this issueTCA Special PublicationsEimac Introduces the 4-125AW. E. Broadcast Gear – From Turntables to TubesPushuing the (Tube) EnvelopeThe Tube That Jack BuiltAnton and AmperexEimac and Gammatrons
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