On the Cover This appears to be British Post Office “Valve Amplifing No. 1,” made by BTH, as discussed in Keith Thrower’s British Radio Valves – The Vintage Years; 1904-1925. The photo is of a sample in the long-abolished tube museum at Bell Laboratories. Photo: Bell Labs, courtesy of Jerry Vanicek. In this issue
Removing sealed-off tubes from a small Sealex machine at the De Forest Radio Co. plant in Passaic, NJ, about 1931. 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 On The Cover: A British playing card promoting the Mazda brand. In this issue
