Category: Magazines

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

The Eimac X-8 triode of July, 1942, one of the Umpteen proto-types that led to the 527 power tube.   In this issue

On the Cover Two historically important cathode-ray tubes: the RCA 906, ca. 1935: and the tektronics T51, ca.1954. See Peter Keller,s synopsis of CRT history in this issue. In this issue

On the Cover The overall assembly drawing for a 36 tube, from RCA Standardizing notice 3-1-236, May 30, 1931 In this issue

On the Cover A variety of ’30’s-vintage tube ans carton labels from RCA In this issue

On the Cover Amperex cover sheet featuring the 8505. In this issue

On the Cover The well reputed EL84/6BQ5 output tube. In this issue

On the Cover On The Cover: A British playing card promoting the Mazda brand. In this issue

On the Cover A penny vacuum tube dispenser. In this issue