Lohmann X-Ray
Manufacturer of industrial and medical X-ray tubes, including tubes for medical, dental, and industrial applications.
http://www.lohmannx-ray.com/

House of Tubes
Ham radio and audio tubes. Online catalog with secure ordering.
http://www.house-of-tubes.com/

Tube World, Inc.
Vacuum tubes and sockets for sale.
http://www.tubeworld.com/

Electron Tube Data Sheets
Type index, high powered tubes and data sheets in PDF format.
http://www.mif.pg.gda.pl/homepages/frank/

Electron Tubes for Industry
Mostly industrial product line.
http://www.elexs.com/2Xmtg.htm

Brand X-ray Tube Co., Inc.
Manufacturer of x-ray tubes for use in medical, dental and industrial imaging and inspection applications.
http://www.brandx-ray.com/

The Invention of the Vacuum Tube
In 1879, the American inventor Thomas Edison publicly exhibited his incandescent electric light bulb for the first time.
http://www.maxmon.com/1883ad.htm

MachMat main
Vacuum tubes for the audio amp market.
http://www.machmat.com/sales/

Freeland Products, Inc.
Rebuilder of vacuum power grid tubes for industrial, radio and television applications.
http://www.freeland-inc.com/

The Tube Center
Providing HAM and amateur radio operators, antique radio enthusiasts, audio professionals and hobbyists the ability to choose from an inventory over 2000 different tube types.
http://www.thetubecenter.com/

20000 NOS Electron Tubes
NOS and used tubes, rare valves, virtual museum.
http://geocities.com/nikolic_lj_dragan/Tubes/NOSElectronTubes.htm

TubeTronic
Vintage Vacuum Tubes and Test Equipment. Audio tubes, TV tubes, Radio tubes and Electron tubes. 12ax7, 12au7, 12at7, Generators, Analyzers, and Counters.
http://www.tubetronic.com/

Kennetron, Inc
Offering rebuilt vacuum, oscillator, induction and transmitter tubes.
http://www.kennetron.com/

Yueqing Zhengli Rectifier Corp.
Tube rectifiers. Site in English and Chinese.
http://www.chinazenli.com/

Vacuum Tube Valley
All about vacuum tubes. Tube audio amp kits.
http://www.vacuumtube.com/

Superior X-Ray Tube Company
Manufactures high quality custom-made x-ray tubes for a wide range of applications such as thickness gauging, food inspection, bone densitometry, dental, medical, and baggage inspection.
http://www.superiorxraytube.com

N9Tew
A supplier of vacuum tubes for ham, audio and antique radio purposes.
http://www.hamtubes.com/tubes/

Vacuum Tubes, Inc.
Worldwide sellers of vacuum tubes and electron tubes for audio, radio, and industry
http://www.vacuumtubesinc.com/

Thales Electron Devices
Provides electron tubes for space, telecom, radio and TV broadcast, military , X-ray imaging, science and industry applications. Includes products specifications and application notes. Formerly Thomson Tubes Electroniques.
http://www.thales-electrondevices.com/

D & C Electronics
World-wide distributor of electron tubes, sockets and magnetrons. Replacement tubes for Perkin Elmer mass spectrometer.
http://www.dandcelectronics.com

Collins Tube Specials
Listing of surplus tubes, searchable database.
http://www.surplussales.com/Tubes-Sock-Acc/VacTubeIndex.html

New Sensor Corporation
Manufacturer and wholesale distributor of vacuum tubes and electronic parts. Sovtek tubes.
http://www.sovtek.com

Magnatek X-ray sources
"Integrated X-ray generators". Also prototype x-ray sources. Danish company.
http://www.xray.dk

Pacific TV Vacuum Tube Sales
Vacuum tubes and vacuum tube socket sales for antique radio, audio and ham use. We ship worldwide. Online schematics, technical data and photo gallery.
http://members.shaw.ca/pacifictv

Vintage SoundWorks
Service for all makes of vintage tube amplifiers and radios. NOS and new and used vacuum tubes.
http://www3.sympatico.ca/v.soundworks/

Daily Electronics Corp.
Electron and vacuum tubes. Industrial, military, broadcast and entertainment applications supplied from inventory. Hard to find and obsolete tubes available.
http://www.worldaccessnet.com/~daily/daily.html

Phamitech International Company Ltd
Exporter of electron tubes, TWT, valves, thyratrons, magnetrons, klystrons, transmitting tubes, heating tubes, vacuum interrupters and X-ray tubes made in China
http://www.phamitech.com

Penta Laboratories
Manufacturer and distributor of electron tubes for broadcast, industrial, marine and avionics applications worldwide.
http://www.pentalaboratories.com/

Burle Industries, Inc.
Manufacturer and supplier of specialized electron tubes and electro-optic products. USA.
http://www.burle.com/