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Raytheon 45 triode - matched pair, various labels
The National Union 45 triode tubes in this precisely matched pair have ST bottles, black plates, and bottom dish getters. Both tubes test as new and are matched for both current draw (33.6 mA & 36.4 mA) and transconductance (109% Gm & 116% Gm).
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The National Union 45 triode tubes in this precisely matched pair have ST bottles, black plates, and bottom dish getters. Both tubes test good and are matched for both current draw (20.5 mA & 20.5 mA) and transconductance (75% Gm & 80% Gm).
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The Philco 45 triode tubes in this precisely matched pair have ST bottles and engraved bases. Both tubes test as new and are matched for both current draw (34.2 mA & 36.0 mA) and transconductance (108% Gm & 112% Gm).
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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.
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