Month: April 2023

On the Cover An oridinary Type 76. In this issue

On the Cover Japanese U233 radar transmitting triode from WW 11. In this issue

On the Cover Svetlana Engineer wins AWA Tyne award. See p. 1 In this issue

On the Cover Eimac X-159 developmental duel Triode. In this issue

On the Cover The 15D prototype UHF triode. In this issue

A family of Philips Innoval tubes – left to right, 6BH5, 6M5, 12AN7, 6N8, and 6AN7. Photo: Daniel Stocks.   In this issue

On the Cover “Early DeForest Audion”. In this issue

On the Cover Bob Reidmuller’s $3 (!) Audion display In this issue

On the Cover George A. Fathauer’s new book. See p. 6 for details In this issue