Wow ¡ª good work!! Great technology sleuthing AND taking care of the people.
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On Oct 18, 2024, at 10:18?AM, Connie W6EFI via groups.io <stillinger@...> wrote:
i'm nodding my head vigorously to everything that Cliff has written, including his experience with the false positive.
I was having a terrible noise problem at my QTH that was blowing out several bands. Turning off my main did not help at all, nor did putting chokes on absolutely everything.
First I thought it was coming from the next-door neighbors large screen TV power supply, but it didn't correlate. Then I had myself convinced it was other neighbors' LED lights, but after giving her biscuits for her dog and asking her politely to simply try unplugging them briefly that didn't help either! Then I thought it was the transformer across the street even though the pattern was too regular¡
Long story short, I got a DXengineering Noiseloop flag antenna for hunting HF RFI (cardioid pattern with deep sharp null), hooked it to my IC 705, walked around the neighborhood and it pointed at a next door neighbor's back bedroom!
I brought them cookies and treats for their cat, had the dad listen first on an on an unthreatening looking little a.m. radio, then brought over my RFI hunting rig and showed him the pattern on the waterfall.
After a little head scratching he asked if if it could be the LEDs in his daughter's bedroom! I said yes, and he ran into unplug them, and the noise went away! He was very pleased with himself and of course I was happy too.
I bought his daughter a new and better set of lights. we all smile and wave at each other now and the dad also gave me some stuff from his garden, which was delicious.
Good luck and 73,
Connie W6EFI
Peter Mahowald