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UA 6176 - Retube
Old 18th November 2009
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UA 6176 - Retube

Hey all. Just bought a UA 6176 used, and I love it.....except for the fact that it intermittently howls, buzzzes and whines. I first noticed it on a vocal session last week, (1st one no problem), and then again today when I ran some prerecorded material through it. After about 15 minutes, it began with a harsh buzz that increased in volume and pitch until it roared for a moment and then went back to normal...definitely don't want it to do that on the keeper take.

Does anyone know what could be causing this? I've got a hunch that its tubes...Anyone have any experience retubing these things? Will it have to be benched and rebiased? I would appreciate any input regarding which tubes will sound the best, where to find them, and any other tidbits of info necessary to make this great piece sound great.
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