tubebooks.org – Vintage info from the days of vacuum tubes: a collection of vintage engineering texts, vacuum tube datasheets, and other obsolete information, presented free of charge and without annoying advertisements.
WorldRadioHistory.com – A vast online repository containing digitised copies of vintage wireless, broadcasting and electronics magazines and technical books.
AudioTubes.com (Brent Jesse Recording and Supply Inc.) – New old stock tubes, valves, tube testers and other geek stuff and very knowledgeable on tubes.
Patuxent Communications – Receiving, Transmitting and Special Purpose Tubes & Other Classic Electronic Parts.
The Tube Center – Buy, sell and swap vacuum tubes.
Old Guy Radiola – Sells tubes on Ebay. Very good prices and they are prepared to haggle and barter.
Tube Museum New York – Tested and graded tubes.
Angela Instruments – NOS Tubes and other guitar and vintage amp parts.
TheTubeStore.com – Audio tubes for any amplifier from high-end home audio to classic guitar amps. Also a good resource for information on tubes.
TubeDepot.com – NOS and new manufacture tubes. They also stock electronic parts, books and amplifier kits. I built one of their Fender ‘Tweed’ amp kits.
KarlTone – Valves, Speakers, Guitar and Pro Audio Accessories. Helpful and friendly service and some of the best prices for JJ tubes on the market. They also test and match their JJ tubes.
Brimar Thermionic Products – are dedicated to bringing you the best valves possible. We know this is a huge task and not one to be taken lightly but each time you purchase one of our electron tubes it brings Brimar closer to manufacturing right here in the U.K.
Watford Valves – Watford Valves is a U.K company that was established in the early 1990s’ and has become one of Europe’s leading suppliers of tested, graded and guaranteed valves and components to the professional music and audio industry.
Hotrox – Supplying Musicians and the Music Industry Worldwide. Very pleasant to deal with and their tubes are reasonably priced too.
Cricklewood Electronics – These guys have been around since I was a kid building my first amps in the early 1980s. It’s great to see they’re still here and still have a few goodies tucked away in their vast warehouse.