Tested NOS at 95% emissions and 96% gm on an Amplitrex AT1000 tube tester
Item Tag: 6L6GB
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1955 Sylvania/CBS 6L6GB (5881,6L6G,6L6GA) Tube – Hickok TV-7B tests @ 42, min:25
Type 6L6GB vacuum tube. Hickok TV-7B/U tested. One tube, circa 1955, U.S.A made by Sylvania forCBS . Acid Etched Designation(Sylvania’s emblem) HickokTV-7B/U is a mutual conductance (Gm) type tube tester.
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One 1959 GE 6L6GB (5881,6L6G,6L6GA) tube – Hickok TV-7B tested @ 39, min:25
Type 6L6GB vacuum tube. Hickok TV-7B/U tested. One tube, circa 1959, U.S.A made by GE . HickokTV-7B/U is a mutual conductance (Gm) type tube tester. Tube features ‘Clear Top’, black plate and two side-mounted ‘Rectangular’ getters construction.
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One 1956 Sylvania 6L6GB (5881,6L6G,6L6-GA)tube – Hickok TV-7B tests @ 35, min:25
Type 6L6GB vacuum tube. 6L6 / GB / C6M. Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. One tube, circa 1956, U.S.A made by Sylvania . Tube features black plate and a top-mounted ‘Rectangular’ getter construction.
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One 1961 CBS/Sil 6L6GB (5881,6L6G,6L6GA) tube – Hickok TV-7B tests @ 39, min:25
Type 6L6GB vacuum tube. Hickok TV-7B/U tested. One tube, circa 1961, U.S.A made by CBS forSilvertone . Acid Etched Designation(CBS’s emblem) HickokTV-7B/U is a mutual conductance (Gm) type tube tester.