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5AR4 / GZ34 tubes
The rare 1959 "fat base" Mullard GZ34 / 5AR4 tubes in this precisely matched pair were made in Great Britain (f31 series). The labels are missing on both tubes, and the Blackburn factory code etching is visible on one tube. Both tubes test as new.
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This rare 1961 Mazda GZ34 / 5AR4 tube has smooth gray plates, dual D getters, and a black base (f33 series). There is no label on the tube but the Brussels factory code is etched in the glass. Tube tests as new.
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This rare 1959 Mazda GZ34 / 5AR4 tube has smooth gray plates, dual D getters, and a brown base (f33 series). There is no label on the tube but the Brussels factory code is etched in the glass. Tube tests as new.
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This 1960s Mullard GZ34 / 5AR4 rectifier tube was made in Great Britain and labeled for other companies (Hammond, Everett, etc.). It has plates with 4 notches (f32 series). The Blackburn, UK factory code is etched in the glass. Tube tests as new.
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This 1964 Mullard GZ34 / 5AR4 rectifier tube was made in Great Britain. It has plates with 4 notches, and a hole in the centering pin (f32 series). The white Amperex Bugle Boy label on the glass is partial (see photo). Tube tests as new.
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This 1960s Mullard GZ34 / 5AR4 rectifier tube was made in Great Britain (f32 series) and labeled for other companies (GE, Hammond, etc). It has plates with 7 notches. The Blackburn, UK factory code is etched in the glass. Tube tests as new.
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This Sovtek 5AR4 / GZ34 rectifier tube has one of the best reputations for new production rectifier tubes at a very affordable price. It was made in Russia by New Sensor corporation and ships in a Sovtek retail box.
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The Sovtek 5AR4 / GZ34 rectifier tubes in this precisely matched pair have one of the best reputations for new production rectifier tubes at a very affordable price. They are tested and matched according to their voltage drop across each section.
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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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