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active equalizer

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    Crackling noise from Bose 901 equalizer

    I have a Bose 901 series 3 active equalizer that has a crackle in the left channel.The unit has been recapped, and all transistors in the left channel outside of one 2n3906 have been replaced. I swapped the 2n3906 with the identical transistor from the right channel (which does not produce this...
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