Tube Collectors Interested in the use, history, and preservation of electron tubes and electron tube technology. Post buy/sell messages.
Tu-be or Not Tu-be Articles about tubes. Primarily geared toward audio applications.
Radio Service Club Dutch company selling vacuum tubes online. Offering a stock audio valves and other kind of valves for amateur radio use.
I-177 Tube Tester Data Nolan Lee has this file with useful information on the tubes tester and its adapter kit for use for testing miniature tubes.
JMH's Valve collection Interesting tubes site from the United Kingdom. Many pictures, data and some for sale/wanted.
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.