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  1. mitch169

    Heath SB-220 Squeals on AM

    Yes, One of the resistors is burnt and the other looks like it's getting there. The person that I bought it from said he would send me them.
  2. mitch169

    Heath SB-220 Squeals on AM

    I just ordered Star Quad Balanced Male to Female Microphone XLR Cables with Amphenols
  3. mitch169

    Heath SB-220 Squeals on AM

    It's coming from the tubes. I did more testing if I move the mike away it stops. so I'm thinking it must be my voice or room noise reverberating from the tubes and causing feedback or it's maybe RF?
  4. mitch169

    Heath SB-220 Squeals on AM

    I just bought an SB220, which squeals on AM 10 and 11 Meters. It has the Harbach Electronics SK-220 Soft-Key Keying Interface and Replacement Filter Capacitor Block. SSB is nice and clear both 11 and 10 meters. 110v Does anyone know what it could be?
  5. mitch169

    President Lincoln II Plus blown finals and regulator

    My Lincoln 2 plus v4 now has a problem. power all the way up on the power knob is 1 watt swinging to 2 watts. if I lower it to 1-watt swings to 15 watts. Blown final?
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