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5AR4 / GZ34

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5AR4 / GZ34 Mazda - made in Brussels

Price: $134.00

This 1961 GZ34 / 5AR4 tube was made in Brussels by Mazda. Its construction is very similar to the Amperex Bugle Boy, with a short bottle, smooth plates, and dual D getters. The code etched in the glass says f33 / L1E. Tube tests as new.

5AR4 / GZ34 Mullard - 4 notch plates

Price: $129.00

This early 1960s Mullard GZ34 / 5AR4 full-wave rectifier tube was made in Great Britain. It has a short bottle, plates with 4 notches, and a hole in the centering pin. The Blackburn factory code is etched in the glass. 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 players, DIY tube audio enthusiasts, and audiophiles.

We also offer high quality and hard to find parts for DIY tube amplifier projects.

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