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since it is a 44V you can unhook the mic and still have receive. see if the noise goes away with the mic unplugged. I had one a few years ago the 1000uf filter cap was weak and letting it make noise. also what meter light is in the radio. some times a LED bulb can cause a problem. the worst ones is the color changing LED's. ever time the color changes it makes a noise in some radios.

[QUOTE="sonoma, post: 627886, member: 756"] since it is a 44V you can unhook the mic and still have receive. see if the noise goes away with the mic unplugged. I had one a few years ago the 1000uf filter cap was weak and letting it make noise. also what meter light is in the radio. some times a LED bulb can cause a problem. the worst ones is the color changing LED's. ever time the color changes it makes a noise in some radios. [/QUOTE]

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