[RFI] Noise centered around 20 meters

[Gary]

Jim,

	I have read your materials -- and have used lots of type 31 material around here choking the common mode.  I hadn't really checked 20 meters, until it soaked into my thick skull I may wind up doing Field Day from my home.

	I work shifts and get to check the radio at all hours, the noise is always there. My friend k0shd has agreed to lend me his SDR when he comes back to town. I am building a loop tonight to use with the portable shortwave radio I borrowed to narrow down either the offending house or utility box tomorrow. I will post waterfall information when I get it.

Thanks to all of you guys for the help! 73,
Gary "Joe", kk0sd
	

-----Original Message-----
From: RFI <rfi-bounces+gary_mayfield=hotmail.com at contesting.com> On Behalf Of Jim Brown
Sent: Saturday, May 23, 2020 7:17 PM
To: rfi at contesting.com
Subject: Re: [RFI] Noise centered around 20 meters

On 5/23/2020 5:03 PM, Gary wrote:
> It’s probably been there since I bought this place.

Have you studied Dave's material and mine? Two things we both recommend are 1) buy or borrow an inexpensive SDR and install one of the many freeware programs that lets your computer control it. 2) Set it to provide a waterfall covering the frequency range(s) where you hear noise, both to learn the character of the noise (electronic or power line), and WHEN it's present. Does it go on and off at any regular times?  The slides for my talks list several inexpensive SDR receivers that were available when I wrote it 3 years ago, and stuff like this has only gotten cheaper and better.

http://k9yc.com/KillingRXNoiseVisalia.pdf

73, Jim K9YC


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