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  1. F

    RPM noise through vic-1/h-161 headsets.

    Thanks.
  2. F

    RPM noise through vic-1/h-161 headsets.

    You might be able to look it up if there is a spec sheet on the unit available. If there is a fuse at the battery terminal hook up(which there should be) open it and see what size fuse it is. Just a note of caution: Any device that is hooked up directly at a battery in any vehicle should have a...
  3. F

    RPM noise through vic-1/h-161 headsets.

    What is the current draw of these vic-1 units? What DC amperage are they fused at?
  4. F

    RPM noise through vic-1/h-161 headsets.

    What you are hearing is "alternator whine", it is AC voltage being passed by the alternator due to a bad diode in the alternator. The alternator is not putting out a steady state DC, there is an AC ripple voltage being imposed on it. If you look at the wave form on an oscilloscope you would see...
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