Mid 1950’s 6L6GA with smoked glass and coke bottle design. Gm Nominal (Pentode) = 6000 Minimum Good = 3600. Green box, in NOS condition. Date code indicates production in April, 1955. We’ve seen this opinion on hobbyist forums for many years, and took it to heart.
Item Tag: 6L6GA
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One 1955 Sylvania/Philco 6L6GA tube – Hickok TV7B tested @ 41, min:25
Type 6L6GA vacuum tube. One tube,circa1955, U.S.A.made by Sylvania for Philco. Hickok TV-7B/U tested. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. Acid Etched Designation (Sylvania’s emblem) .
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One 1940’s Sylvania/Philco 6L6GA tube – Hickok TV7B tested @ 40, min:25
Type 6L6GA vacuum tube. One tube,circa1940’s, U.S.A.made by Sylvania for Philco. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. Acid etched designation (Sylvania’s emblem) Tube features black plate, smoked glassand bottom-mount ‘Rectangular’ getter construction.
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1953 Sylvania/Hytron 6L6GA (6L6,6L6G,6L6GB) tube – Hickok TV7B tests@ 41, min:25
Type 6L6GA vacuum tube. One tube,circa1953, U.S.A.made by Sylvania for Hytron. 6L6 / GA / K1M. Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. Acid etched designation (Sylvania’s emblem) .