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circuit noise

  1. Z

    Help diagnosing noise in a Marantz 7 circuit

    Hi All, First post here. I have a Marantz 7 pre-amp that has persistent noise to it. The audio affliction is composed of both a high frequency whine and a lower frequency rhythm, with the whine similarly being of higher decibel and the rhythm being similar to the tapping pattern a...
  2. Rob DeFries

    Sharp STM-31 Spage Age, only hum..

    Got this Sharp Space Age Amp to see if one could get it to work again. A quick look revealed 3 blown power transistors, all 2SC1060, and a C-E shorted 2SC984. The last one could give some trouble to find. EDIT: I had some in one of the drawers. The amp is far from mint, knobs are totally...
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