Al's point is very well taken.
I've encountered more than one device that is "Part 15 Compliance", when indeed measurements confirm it only has the "Part 15 Label". With companies performing self certification, first there is no assurance the results are accurate and second, manufacturing changes are implemented often without performing the certification measurements. Yes, I know what is supposed to take place......but it does not. Thus once certified, always certified. Do note: There are several "grow lights" on the market today that are "Part 15 Certified" and these have been found to be generous noise generators. {Perhaps your neighbor would share some of his crop to make your "pain" more tolerable.} Also some brands of ballast are noted to be sold to residential use customers when indeed they are labeled for commercial service only. They don't meet Part 15 Requirements. 73 Bob, K4TAX K3S s/n 10,163 On 9/26/2015 9:23 AM, Al Gulseth wrote:
2) Improperly designed (or "cheated" designs which claim to but don't meet Part 15 spec) consumer electronics can throw RFI/EMI hash back out onto the power feed and thus radiate it for quite a distance. I've been through the drill of chasing that problem also. 73 es GL on finding your noise source, Al
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