Tube Tester Manuals
SND Tube Sales - also sell tube testers.

Tube Collectors
Interested in the use, history, and preservation of electron tubes and electron tube technology. Post buy/sell messages.

Valve And Tube Supplies
British site with some great resources!

TV-series and I-177 Tube Tester Settings
Resource for the TV-2, TV-4, TV-10, and I-177. Military surplus tube testers.

Nostalgia Down Under
Valve radios, and vintage electronics. From Australia. Includes some tube data from down under.

EB5AGV's TV-7 Tube Tester
TV-7 Tube Tester information and help.

TV-7 Index
More tube tester source data.

Schmaus' Vacuum Tube
Vacuum tube resources for students and more advanced users. Basic techniques to SPICE simulation.

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.

The Vacuum Technology Page
Vacuum technology resources for students and more advanced users. Fundamental techniques to SPICE simulation. From Roy Schmaus at the Electrical and Computer Engineering Department of the University of Alberta.

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.

Avo CT-160
Portable tube tester from the United Kingdom. Includes other tube tester information too.

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.

How a Vacuum Tube Works
Almost everything you could wish to know about tube theory. From Svetlana Co.

G8LSD Valve Collection
Pictures and data for various tubes he has collected.

JMH Virtual Valve Museum
Valve information, lists, links, for sale, and wanted listings.

Westinghouse 861 Power Triode
Interesting, large transmitting tube information, by AB0CW, Mark Dittmar.

The Idiot's Guide To Tube Testers
Broad variety of information on line from The Tone Lounge.

Military Tube Testers
Tube tester manuals online from BAMA.

Leviathan GM100
Photos and project notes for the Russian GM100 Tube.

The Tube Market
Vacuum tubes for antique radios, televisions, and amplifiers.

Zeitmann - Tungsram Tubes
NOS and used EL84, ECC83, and E88CC Tungsram vacuum tubes. Extensive listing.

Daily Electronics
Electron tubes and vacuum tubes, plus new and hard-to-find obsolete tubes.