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5U4G / 5U4GB tubes
This 1960 CBS 5U4GB full-wave rectifier tube black plates and a halo getter. The tall bottle has "5U4GB" etched in the glass and the red print on the base has the CBS logo. Tube tests as new.
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This 1960s Raytheon 5U4GB full-wave rectifier tube has black plates and dual side getters. The yellow print on the glass has the Raytheon logo (partial). Tube tests as new with balanced diodes.
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This 1960s RCA 5U4GB full-wave rectifier tube has black plates and a side O getter. The red print on the base has the RCA logo. Tube tests as new.
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The 1964 RCA 5U4GB rectifier tubes in this precisely matched pair have black plates and O getters. The red print on the base has the RCA logo. Both tubes test as new with balanced diode sections
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This 1960s Sylvania 5U4GB full-wave rectifier tube has black plates and a top halo getter. The black base has yellow print with the Sylvania lightening logo and the bottle has 5U4GB inscribed on it. Tube tests as new.
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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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