Joe Knight showing Jim McConville his official replica of the Lieban-Reiss-Strauss (LRS) Relay, made by Siemans & Haiske, at the TCA meeting in October, The carton is emblazoned with warnings like “Achtung! Vorsichtig Behandeln. Attention! Manier avec soin” In this issue
“First siliicon in Silicon Valley”. A PNPN diode, 1958 production from the ill-fated Schockley Transistor Coroporation, working merrily in a simple relazation oscilator. The diode is the tubular gold-colored device in the clips at lower left. The pulse rate shown is 800Hz, but the falltime is so crisp as to put a vigorous whine into...
A stach of rare Philco-branded “export” tubes as recently found in Canada. See the story on page 2. In this issue
The Philips TBL6-4000 air-colled triode for industrial RF heaters, rated for continuous dissipation of 1.3 kW. Its “EIA identity is 7753, as registered by Amperex in 1960. From J. Haanjes and H. Carter, Classificatio of Electron Tubes, 2nd edition (New York, Macmillan, 1962), courtesy Bro. Patrick Dowd. In this issue
Udo Radtke, “power-collector,” with his YK-1001 klystron (for UHF television, 10 kilowatts) in an elegantly welded-up display stand. For a fine cutaway image of this 180- pound tube, complete with its resonant cavities, see www.tubecollection.de/ura/YK-1001.htm. “He who dies with the biggest tube wins.” Photo: Udo Radtke. In this issue
A fine old WECo (pre Bell Labs) shot of a “tennis-ball” repeater tube. Source: Jerry Vanicek. In this issue
Even the family cat likes Philips-Mullard tubes! Brochure from Sibley Collection. In this issue
An Eimac 8351/4CV100,000 vapor-cooled tetrode, of the type used in one of the Collins 250-kW transmitters, now removed, at the Voice of America transmitting site outside Delano, California. It is accompanied by its much smaller vcousin, a mere 4-1000. In this issue
Part of a fine collection of developmental metal tubes. See inside for more details Photos: Bob Millard. In this issue
Soviet-era transmitter technician tests at the fuse panel. From Radio magazine, March 1954 In this issue