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SET owners, need help with Rectifier tube

I am looking to replace the rectifier tubes in my Coincident Frankenstein monoblocks. The current tube which came with the amps is a GZ4P. I have learned the P designation indicates a Chinese tube.

Does anyone have experience with a Russian substitute which is a 5U4C?

Mullard has a substitute which is a GZ30 which go for $50.00 each. Is it possible these tubes can effect a sonic improvement?

Any input would be much appreciated. Thanks.
montepilot

Showing 1 response by jax2

jax2
3,031 posts
 
You might try writing to Israel. He'd certainly know the best rectifier tube for his amp. With my own Quicksilver SET amps which are also a 300B SET with tube rectification (5AR4's in my case), changing the rectifier definitely has an effect on the sound.

Good luck!
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