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Posted

Further information:

 These are labelled CV1377 f32  but are the military variant of the famous Mullard GZ34 f32 originating from the Blackburn factory, UK. They have a very good reputation for reliability and an estimated lifespan of up to 10,000hrs.

While some believe that rectifier tubes do not have a big influence on sound quality, I found these to be a significant improvement over current 5AR4 tubes.  There is no shortage of good reviews of this particular valve - at the top of its tree! Estimated use is about 900 hrs.


Photos:

 

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IMG_1992.thumb.jpeg.b732825ad5aa6f31efd525ec0ba40713.jpeg

IMG_1990.thumb.jpeg.342289535660bc625ddd7f6ad2217c48.jpeg

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Posted

Rectifiers do make a huge difference to the SQ.

 

Mullard made GZ34s are imo the best GZ34.

These look legit with the factory code.

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