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Try un reversing what you may have reversed before and see what it does.
Another thought is microphonic tubes...If they like to resonate at that freq and volume is high enough to stimulate them that could be the source of the oscillation.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
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