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  1. SASSAFRASS

    VHF noise ONLY on CH 73 - Only with Instruments ON

    Guessing you have already checked but 1st thing is to verify its not you, check another boat or handheld with everything off.  Sounds unlikely but we had a AIS virtual signal from Manzanilla that was on the fritz and would scramble 12 or 17 in a ancorage several miles away.  Lots of people were...
  2. SASSAFRASS

    VHF noise ONLY on CH 73 - Only with Instruments ON

    I would start with the easiest, disconnect the splitter and power down the AIS and try it, next different ant and whip at the radio to verify cable run and mast head whip.  I have a vague memory of 73 being brought up before for the same issue related to LED units like MD said. The good part is...
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