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The Larger Topic Of Electrical Noise Suppression

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Ben Zonia
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Location: Honor

The Larger Topic Of Electrical Noise Suppression

Post by Ben Zonia » Sun Aug 23, 2020 12:20 pm

This is a good link. The items are kind of pricey though. I like the idea of suppressing noise on each phase of the circuit breaker box. If your neighbors are electrical noisemakers, this might be something to consider.

What about cheaper solutions? Any suggestions?

https://www.lessemf.com/suppress.html


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k8jd
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Joined: Fri Jun 28, 2013 3:35 pm
Location: Commerce, MI

Re: The Larger Topic Of Electrical Noise Suppression

Post by k8jd » Mon Aug 24, 2020 12:37 pm

The placement of your antenna(s) is a BIG factor.
Can you give some idea of what freq range and antenna situation you have had noise problems with ?
The gadget's advertized in the link look like snake oil to me.



HGR1290
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Joined: Tue Mar 12, 2013 6:05 pm
Location: Acworth, GA

Re: The Larger Topic Of Electrical Noise Suppression

Post by HGR1290 » Mon Aug 24, 2020 7:06 pm

At my location, I am fortunate enough to have a large back yard. I live about 5 miles from 50kW WFTD-Marietta GA.

I have a single turn untuned loop antenna located 200 feet behind my house, and over 500 feet from any other house.

The loop feeds a Wellbrook 30db amp., which drives the 200 feet of coax back to an SDR-IQ and a Grundig Satellit 800. I found that a low-gain loop, with some pre-amp is desirable vs a longwire, etc. While signals are weaker on the loop, the signal to noise is much better with a closed loop.

Even with the distance from the house, I was still troubled by noise running up and down the coax. I am using a common mode choke back at the house, from https://myantennas.com/wp/product-category/cmc-2/ I am using the CMC-510. This choke, effectively killed over 95% of local RFI. For good measure I also hang snap on ferrites an just about every cable in the shack.

I am in suburban Atlanta, and can routinely hear WSM-650 in Nashville---daytime. I can see carrier from WHAS-840 in the middle of the day. WSM is around 0.25mV/m at this location.

So, yes, antenna location is important, but you may have to add additional suppression, depending on you location.



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Turkeytop
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Re: The Larger Topic Of Electrical Noise Suppression

Post by Turkeytop » Mon Aug 24, 2020 9:53 pm

Ben Zonia wrote:
Sun Aug 23, 2020 12:20 pm
This is a good link. The items are kind of pricey though. I like the idea of suppressing noise on each phase of the circuit breaker box. If your neighbors are electrical noisemakers, this might be something to consider.

What about cheaper solutions? Any suggestions?

https://www.lessemf.com/suppress.html
They advertise it like it's some kind of medical device. I'm plagued with noise here, but most of it is radiated noise I'm picking up. I don't think those filters would help me.



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SolarMax
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Location: 313

Re: The Larger Topic Of Electrical Noise Suppression

Post by SolarMax » Mon Aug 24, 2020 11:10 pm

"Special electronic circuitry simply drains the high-frequency pollution out of the wiring system"

Seriously? Really?

Not how any of this works.



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