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In Reply to: RE: Using the 6H30 "super tube" narrows the choice posted by E-Stat on February 26, 2017 at 10:15:00
While I now have several pieces of ARC gear that use the 6H30 I have only had one long enough to find out tube life on the 6H30.
My PH-6 phono stage definitely sounded tired after about 4000 hours. A new set of tubes brought back the magic. I would imagine the same will be true with the SP-20.
Generally ARC is pretty conservative on tube life and I can typically get good performance going beyond their recommended hours of use. But that has been with 6550 output tubes and 6922 small signal tubes. With the 6H30 I think they are correct on 4000 hours. Time to change.
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