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  1. Richard Rooney

    High pitched noise when bright switch is on , ch3

    Hello, when I turn on the bright switch on channel 3 I get a high pitched noise, has anyone else had this issue.I guess it might be the preamp tube it's connected to or the cap .
  2. Richard Rooney

    New Member

    Hi , I'm a new member, I've had a Mark V for about 5 years.I joined to look up a problem I'm have .On ch3 when I set the switch to bright I get a high pitched squeal or noise.I looked at the diagram and see it might be a cap. Anyone else have this issue ?
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