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Avo CT-160
Features the Avo CT-160 portable valve testers. Includes specification details, links, and photos.
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Frank's Electron Tubes
Page provides historical overview and information about vacuum tubes, source for tube data, and resource links.
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G8LSD Valve Collection
Private collection of different types of vintage valves. Includes details on photo links.
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Hickok I-177 tube tester
Photographs and information about this American tube tester from WW-II.
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JMH Virtual Valve Museum
Presents personal collections of valves that includes exhibit details, documents, and upcoming events.
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Schmaus' Vacuum Tube
Information site for vacuum tube equipments, with links on other radio devices.
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Tube Collectors
Features the collector-historians interested in the use, history, and preservation of electron tubes and electron tube technology.
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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.
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tubewizard.com
Information, with photos, of various tubes and testers, offers to repair or restore.
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TV-7 Tube Tester
Showcases portable units of tube testers, information on technical manuals and tube data, and page index.
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Westinghouse 861 Power Tetrode
Featuring the large Westinghouse 861 Power Triode transmitting tube.