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Old 06-25-2018, 09:32 PM
thesolarsailor thesolarsailor is offline
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Ignition noise on radio

Hi All

I have a 1976 A4 in a Newport 28 sailboat. A previous owner upgraded the ignition to electronic, the boat has been in fresh water forever so there is little corrosion on the electrical system. Here is the dilemma:

I cannot run a hard wired radio while the engine is running, I get a serious popping through the speakers which I assume is the ignition system.

I have rerouted all grounds to a single point on the engine, added external ground to the alternator, rewired the 1/2/both switch to meet ABYC standards and the problem has changed by maybe 5%. The antenna leads are run separate from any power leads.

I prefer to fix the problem rather than install a filter on each power lead, any recommendations?
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