Avo CT-160
Portable tube tester from the United Kingdom. Includes other tube tester information too.
Frank's Electron Tubes
Information on various vacuum tubes, sources and substitution data.
JMH Virtual Valve Museum
Valve information, lists, links, for sale, and wanted listings.
List of Power Tubes
Handy list of transmitters, transceivers and amplifiers and listings for which tubes are used in their final stages for RF amplification and modulation.
Nostalgia Down Under
Valve radios, and vintage electronics. From Australia. Includes some tube data from down under.
The Idiot's Guide To Tube Testers
Broad variety of information on line from The Tone Lounge.
Tube Collectors
Interested in the use, history, and preservation of electron tubes and electron tube technology. Post buy/sell messages.
Westinghouse 861 Power Triode
Interesting, large transmitting tube information, by AB0CW, Mark Dittmar.