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1st Tube Change Puzzlement

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After six blissful weeks of my new amp, I decided it was time for new SV83's. SO, I removed the factory 83's and popped in two new replacements. I was quite puzzled at what happened next. The well-balance sound of the original tubes was replaced by a more rolled-off and recessed sound of the replacement tubes. This is exactly the opposite of what I expected to hear: brighter, more brittle sound till run-in.

What's going on? The unit has auto bias and balacing. I was wondering if the replacements, from another source, were presenting a problem to the auto bias? Neither set is matched. Thanks.





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Topic - 1st Tube Change Puzzlement - albee33 08:39:44 04/23/00 (9)


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