Amp/Preamp Asylum

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RE: Audio Research LS-27 preamp tube replacement

Posted by airtime on February 25, 2017 at 18:11:29:
Generally when the dealer recommends you change the tube that soon it's because they are driving that tube hard.

If you can find a more rugged 6H30 that may help. My advice is contact Jim McShane over at the tube forum. He's the tube man. If there is an answer most likely Jim has it.