Frank's Electron Tubes
- Information on various vacuum tubes, sources and substitution data.
- http://www.tubedata.org/

TV-7 Tube Tester
- TV-7 information and technical help.
- http://jvgavila.com/tv7.htm

Leviathan GM100
- Photos and project notes for the Russian GM100 Tube.
- http://www.vt52.com/diy/myprojects/amps/gm100/gm100.htm

Military Tube Testers
- Tube tester manuals online from BAMA.
- http://bama.sbc.edu/military.htm

The Idiot's Guide To Tube Testers
- Broad variety of information on line from The Tone Lounge.
- http://www.tone-lizard.com/Tube_Testers.html

Westinghouse 861 Power Triode
- Interesting, large transmitting tube information, by AB0CW, Mark Dittmar.
- http://www.qsl.net/ab0cw/861_power.htm

JMH Virtual Valve Museum
- Valve information, lists, links, for sale, and wanted listings.
- http://www.tubecollector.org/

G8LSD Valve Collection
- Pictures and data for various tubes he has collected.
- http://www.r-type.org/muse/aaa0000.htm

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.
- http://www.muchstuff.com/xmttube2.htm

Avo CT-160
- Portable tube tester from the United Kingdom. Includes other tube tester information too.
- http://www.duncanamps.com/technical/ct160.html

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.
- http://www.acadiacom.net/nlee/i177_index.html

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.
- http://www.ee.ualberta.ca/~schmaus/vacf/index.html

Tu-be or Not Tu-be
- Articles about tubes. Primarily geared toward audio applications.
- http://soundstage.com/tubeor/tube.htm

Schmaus' Vacuum Tube
- Vacuum tube resources for students and more advanced users. Basic techniques to SPICE simulation.
- http://www.ee.ualberta.ca/~schmaus/elect/tdex.html

TV-series and I-177 Tube Tester Settings
- Resource for the TV-2, TV-4, TV-10, and I-177. Military surplus tube testers.
- http://www.acadiacom.net/nlee/

Tube Collectors
- Interested in the use, history, and preservation of electron tubes and electron tube technology. Post buy/sell messages.
- http://www.tubecollectors.org/