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heathkit sp2

  1. david24x7

    Weird Hum from Heathkit SP2 Preamp

    Hi. I just finished recapping all the electrolytics in this preamp that I've been using for some time (better late than never). I had some issues with recitfier diodes but I've worked that out and I had eliminated the 60 cycle hum that given me trouble. After I got it back on the shelf (and...
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