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  • Avo CT-160  - Features the Avo CT-160 portable valve testers. Includes specification details, links, and photos.
  • Frank's Electron Tubes  - Page provides historical overview and information about vacuum tubes, source for tube data, and resource links.
  • G8LSD Valve Collection  - Private collection of different types of vintage valves. Includes details on photo links.
  • The Idiot's Guide To Tube Testers  - Information guide to determining the functions of the tube testers.
  • JMH Virtual Valve Museum  - Presents personal collections of valves that includes exhibit details, documents, and upcoming events.
  • Leviathan GM100  - Displays photos of the GM100 Tube with descriptive information.
  • Military Tube Testers  - Features different types of tube testers that contains guides and manuals.
  • Nostalgia Down Under  - Provides historical facts, valve pictures and general information, that includes a collection of old radios and valve circuits.
  • Schmaus' Vacuum Tube  - Information site for vacuum tube equipments, with links on other radio devices.
  • Tube Collectors  - Features the collector-historians interested in the use, history, and preservation of electron tubes and electron tube technology.
  • Tu-be or Not Tu-be  - Provides informative articles, and customer service in offering individual assistance to collectors in identifying long lost or vintage tubes.
  • TV-7 Tube Tester  - Showcases portable units of tube testers, information on technical manuals and tube data, and page index.
  • The Vacuum Technology Page  - Provides resource page on the fundamental aspects of the Vacuum Technology.
  • Westinghouse 861 Power Tetrode  - Featuring the large Westinghouse 861 Power Triode transmitting tube.
 
 
 
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