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Did you try some ferrites? Mix 61 & 31

Although not exactly the same, my 12/120v NORCOLD portable refrigerator/freezer caused so much RFI that I couldn’t operate the radio while underway in the Pete when the compressor kicked on.

A huge toroid from PALOMAR ENGINEERS was the fix. I could still hear the noise (to tell you it was there), but it was no longer Interference worthy of the definition.

The radio wasnt ever powered by vehicle circuitry and the chest was a good six feet back and four feet down from the radio. Coax went sideways from the radio.

In different brand/model trucks since (sometimes with coax passing overhead by five feet), no change to noise reduction.

My big truck goes from quiet to loud depending on what is running. That’s the start. The chart. On a U980, I can track S-Units before daylight very easily.

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<blockquote data-quote="Slowmover" data-source="post: 752649" data-attributes="member: 44265">Did you try some ferrites?&nbsp; Mix 61 &amp; 31Although not exactly the same, my 12/120v NORCOLD portable refrigerator/freezer caused so much RFI that I couldn’t operate the radio while underway in the Pete when the compressor kicked on.A huge toroid from PALOMAR ENGINEERS was the fix. I could still hear the noise (to tell you it was there), but it was no longer Interference worthy of the definition.The radio wasnt ever powered by vehicle circuitry and the chest was a good six feet back and four feet down from the radio. Coax went sideways from the radio. In different brand/model trucks since (sometimes with coax passing overhead by five feet), no change to noise reduction.My big truck goes from quiet to loud depending on what is running. That’s the start. The chart. On a U980, I can track S-Units before daylight very easily. .</blockquote>

[QUOTE="Slowmover, post: 752649, member: 44265"] Did you try some ferrites? Mix 61 & 31 Although not exactly the same, my 12/120v NORCOLD portable refrigerator/freezer caused so much RFI that I couldn’t operate the radio while underway in the Pete when the compressor kicked on. A huge toroid from PALOMAR ENGINEERS was the fix. I could still hear the noise (to tell you it was there), but it was no longer Interference worthy of the definition. The radio wasnt ever powered by vehicle circuitry and the chest was a good six feet back and four feet down from the radio. Coax went sideways from the radio. In different brand/model trucks since (sometimes with coax passing overhead by five feet), no change to noise reduction. My big truck goes from quiet to loud depending on what is running. That’s the start. The chart. On a U980, I can track S-Units[B] before daylight[/B] very easily. . [/QUOTE]

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