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  • Hum and Buzz - Part II

    Electrical equipment is grounded for safety reasons. Grounding can also help prevent RF interference First… let’s get some agreement on nomenclature… since I’m writing, I get to pick. [:neener:] There are many different ways to refer to “ground” and much depends on the context. As with everything else...
    Posted to Andy's Blog (Weblog) by Andy W on 11-16-2007
    Filed under: ground, hum

  • Hum and Buzz – Part I

    It is a fact of life. Ground current happens. And where it flows makes all the difference. In a perfect world there would be no ground current on the AC power line. AC would enter on the LINE, and return on the NEUTRAL, and the earth ground would just sit there. In the real world there is inductive and...
    Posted to Andy's Blog (Weblog) by Andy W on 11-09-2007
    Filed under: ground, hum

  • Hum and Buzz – Part III

    Ground Loops 101 Let’s start our discussion of ground loops with two pieces of chassis grounded equipment. Class II equipment can exhibit hum and buzz too, but the mechanism is a little different, but we’ll talk about that in another installment. We’ll also start with an “unbalanced”...
    Posted to Andy's Blog (Weblog) by Andy W on 11-30-2007
    Filed under: ground, hum, buzz

  • Hum and Buzz – Part IV

    Antenna/Cable TV Ground loops. OK so you’ve narrowed your ground loop issue down to your cable connection or your rooftop antenna. You’re not alone; this is one of the more common ground loop issues, but I don’t necessarily want to want to get into the gory details, so here are a few...
    Posted to Andy's Blog (Weblog) by Andy W on 12-14-2007
    Filed under: ground, hum, buzz, video, cable, antenna
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