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Old 07-31-2020, 04:38 PM   #11
oldmanbill
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Join Date: Jul 2020
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One source not mentioned is the exhaust system which can create noise and generally on hf. It is generally hung on rubber with the only contact at the engine and some are poor connection electronically. Depending on your pollution system some sensors can connect to the wiring system. I ran hf in big trucks for years and have had that come up.

Another source is radial tires and driveshaft which are not your problem as you describe it but keep that in mind in the future. I once had a ticking sound on 40m that was finally cured by braided ground straps to the exhaust system.
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