| 20000 NOS Electron Tubes: NOS and used tubes, rare valves, virtual museum. |
| Antique Electronic Supply: Books, transformers, capacitors, and resistors. Has an online catalog and shopping cart. |
| Brand X-ray Tube Co., Inc.: Manufacturer of x-ray tubes for use in medical, dental and industrial imaging and inspection applications. |
| Burle Industries, Inc.: Manufacturer and supplier of specialized electron tubes and electro-optic products. USA. |
| California Tube Laboratory, Inc.: Electron tube and vacuum tube manufacturer. High power CW and pulse magnetrons, klystrons and power grid tubes. Product listings and data sheets, and outline drawings. |
| Collins Tube Specials: Listing of surplus tubes, searchable database. |
| D & C Electronics: World-wide distributor of electron tubes, sockets and magnetrons. Replacement tubes for Perkin Elmer mass spectrometer. |
| Daily Electronics Corp.: Electron and vacuum tubes. Industrial, military, broadcast and entertainment applications supplied from inventory. Hard to find and obsolete tubes available. |
| DBtubes.com: New old stock, new bulk and used tested tubes. Canadian site. |
| Electron Tube Data Sheets: Type index, high powered tubes and data sheets in PDF format. |
| Electron Tubes for Industry: Mostly industrial product line. |
| Freeland Products, Inc.: Rebuilder of vacuum power grid tubes for industrial, radio and television applications. |
| House of Tubes: Ham radio and audio tubes. Online catalog with secure ordering. |
| Kennetron, Inc: Offering rebuilt vacuum, oscillator, induction and transmitter tubes. |
| Lohmann X-Ray: Manufacturer of industrial and medical X-ray tubes, including tubes for medical, dental, and industrial applications. |
| MachMat main: Vacuum tubes for the audio amp market. |
| Magnatek X-ray sources: "Integrated X-ray generators". Also prototype x-ray sources. Danish company. |
| Michelle Troutman's Electronics Items: NOS and used vacuum tubes; also, service manuals and Sams Photofacts, parts, magazines, books, radios and test equipment. |
| Mike's Electric Stuff: Antique Glass and Vacuum stuff, for electronics and high voltage. |
| N9Tew: A supplier of vacuum tubes for ham, audio and antique radio purposes. |
| New Sensor Corporation: Manufacturer and wholesale distributor of vacuum tubes and electronic parts. Sovtek tubes. |
| Pacific TV Vacuum Tube Sales: Vacuum tubes for radio, audio and amateur use. Over 1,000 types with regular 5 lot sleeve specials. Canadian site. |
| Penta Laboratories: Manufacturer and distributor of electron tubes for broadcast, industrial, marine and avionics applications worldwide. |
| 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 |
| 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. |
| 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. |
| The Invention of the Vacuum Tube: In 1879, the American inventor Thomas Edison publicly exhibited his incandescent electric light bulb for the first time. |
| 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. |
| Tom's Tubes: Russian PA tubes. Paypal. |
| Tube World, Inc.: Vacuum tubes and sockets for sale. |
| TubeTronic: Vintage Vacuum Tubes and Test Equipment. Audio tubes, TV tubes, Radio tubes and Electron tubes. 12ax7, 12au7, 12at7, Generators, Analyzers, and Counters. |
| Vacuum Tube Valley: All about vacuum tubes. Tube audio amp kits. |
| Vacuum Tubes, Inc.: Worldwide sellers of vacuum tubes and electron tubes for audio, radio, and industry |
| Vintage SoundWorks: Service for all makes of vintage tube amplifiers and radios. NOS and new and used vacuum tubes. |
| Yueqing Zhengli Rectifier Corp.: Tube rectifiers. Site in English and Chinese. |
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