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RE: Runaway bias - please HELP!

"Upon turn-on, the affected amp was showing bias as c. 750. Slight turn of the bias pot to raise it, and bias started rising...and rising...and rising, with no stopping. Through 800, 900, 1000, and so on, rather quickly; by the time I rotated the pot in the opposite direction to lower bias, it was over 1600 and still going up. A slight (by 'slight' I mean less than 1/4 turn) counter-rotation to the starting point, and bias immediately fell back to c. 750 - it did not go back through the numbers as it did while rising, but defaulted, as it were, to the 750 point. Another attempt to get it to correct bias, and the same thing happened "

That sure sounds like a bad pot to me.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"


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  • RE: Runaway bias - please HELP! - Tre' 14:27:51 06/09/14 (0)

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