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RE: Advise on tube rolling on ARC Ref2mkII - GZ34 - Unexpected result

Posted by PFMaudio (A) on June 19, 2016 at 14:59:41

In Reply to: Advise on tube rolling on ARC Ref2mkII - GZ34 - Unexpected result posted by PFMaudio on June 18, 2016 at 11:38:03:

Thanks for the advice! I have put back the ruby 5AR4 and the bass became as it was. Notes not bloated in certain keys and good bass articulation. I think I will not try the diode trick, as it far exceeds my technical skills and theARC REF 2 mk II is a reference piece of gear and ARC is a solid company developing excellent and reliable solutions.

I noticed that the PHILLIPS GZ34 logo on my tube has vanished in powder marks after 20 hours of listening. I wonder if this is normal. Can it be a fake tube? The etched codes are still there..f32/B5A1. The tube has 7 notches on the plates. Is it a 1965 or 1975? I heard the 1965 only had 4 notches.
N
My question regards for how long shall I have my ruby rectifier on good working conditions. I believe they have at least 2500 hours and don't know how long it lasts. Any idea?

Decidedly, the Mullard NOS appear to be the wrong way to go, in my gear and in my room. Too much bass energy, bloating some bass notes. The ruby 5AR4 is a better solution, at least in my listening conditions. Any alternatives suggested?
pfmaudio

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