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Issues with the AMPLITREX AT1000 TUBE TESTER
File:Vintage EICO Tube Tester, Model 625, Metal Cabinet, EICO Electronic Instrument Company, One Vacuum Tube (6H6), Made In USA, Circa 1950 - 1952 (36078986142).jpg - Wikimedia Commons
EICO 625 Vacuum Tube (Valve) Tester
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