RFI & Neighbors

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RFI & Neighbors

#345800

Post by 231 »

Hey gang,

I thought I'd post a recent event that could have gone either direction...good or bad. I had been getting allot of noise (way worse than normal / 10-20 over s-9) wiping out the entire HF spectrum and virtually making playing radio next to impossible. I have a portable SWL radio with an s-meter on it that usually I'm able to locate noise generating items (i.e. TV's, power supplies, dimmer switches, etc.) fairly quickly. And after a couple of weeks (intermittently) trying to locate the noise source, finally found it. As it turned out my new neighbor next door had the noise the loudest at his electrical meter (compared to all the other neighbors)...but nothing showing on the s-meter (usually it shows some signal strength but not this time). So I knocked on the door to talk to them. I explained my situation and that I think the noise is being generated from their home. And if they'd be so kind as to help figure out what specifically is causing it so we could fix it. I also explained in that, things like power strips failing can even be fire hazards...and a sign of them failing is generating noise. Usually folks are open to hearing that sort of info' (which is true) and cooperate. They are a very nice young family with 3 little ones running around...so no doubt their safety is important.

He was kind enough to invite me in and we started trying to find the noise source. It's a 2-story home, and although a few things were generating some noise (not badly) on the main floor, it was obvious were striking out. He asked me to come up stairs and check their TV, which was fine up there too. And their oldest boy (8 or 9 I think?) said, "Hey, what about this?" He was pointing at a Kindle reader that was charging. I put my SWL radio next to it and BOOM...we had it! Pegged the s-meter. We unplugged it and all of the noise was gone. Turned out they had bought a Chinese "Universal USB Charger" that by itself was fine. Plugged into a USB and device and it turned the USB cable into an antenna splattering RFI of the likes even a plasma TV wouldn't have done. We laughed, talked, and I shared my sincere appreciation for their cooperation. He handed me the charger and said, "I will let you dispose of this." :-)

So the moral of the story is, it pays to get along with your neighbors. If you are bleeding on them, work with them to fix the problem because you never know when you'll need them to do the same.

Just a positive story that has made my playing radio fun again and I thought I'd share it.

231
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dirtyjob
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#345805

Post by dirtyjob »

I'm glad it worked out for you, just shows me there are still good people around that can work things out, glad it went that way. :icon_e_smile:
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#345808

Post by Rabbit Ears »

I wish it was that way with my neighbor FIVE years ago!!

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#345811

Post by MDYoungblood »

Lol, My daughter bought a charger for her Dell Inspiron Laptop because the original died, needless to say she got it off Ebay cheap. Well shortly after mine died and I asked her if I could use her's to charge the battery. Turns out it is a Chinese clone with Dell's name and trademark all over it. It was giving me a S6 all day, thought it was just atmospheric noise until I unplugged it. Tore it apart, it had absolutely no cap filtering in it and the ground lead not even hooked up, did get a good ferrite out of it.

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#345848

Post by Spiderleggs »

MDYoungblood wrote:Lol, My daughter bought a charger for her Dell Inspiron Laptop because the original died, needless to say she got it off Ebay cheap. Well shortly after mine died and I asked her if I could use her's to charge the battery. Turns out it is a Chinese clone with Dell's name and trademark all over it. It was giving me a S6 all day, thought it was just atmospheric noise until I unplugged it. Tore it apart, it had absolutely no cap filtering in it and the ground lead not even hooked up, did get a good ferrite out of it.

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Greg
Similiar situation here, replaced my youngin's original power supply with another on his laptop. At first could not figure where I was getting 7 pounds of noise and a sometimes beeping sound. My mobile could pick it up 2 houses away. Once when the power failed and I was in the mobile the noise was gone so I figured it was something in the house. I went to turning off breakers one at a time until one of them silenced the noise then traced it to the power supply.
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#345850

Post by 443 Arizona »

my neighbor subscribed to a T-1 connection using a hughes dish with some kinda machinegun looking collector,, the tech installing it did a good job, i looked at it and asked if being almost precisely lined up with my base antenna would affect it,,
he looked at his sat finding meter thing-a-jig and said no, he took barely a glance at my antenna.
i thought, hey i did my part.
come to find out it was NOT ok.
spurious (bled like a stuck pig) both ways.
some kinda secondary resonance was there.
tech was back.
repositioned the dish and added filters(i think they were),
same problem, just not as bad.
she said it didn't matter cause she was eventually going to be moving.
and she did. I halpt. hehe :clown:
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