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Re: [RFI] New Interference at kk0sd

To: Gary <gary_mayfield@hotmail.com>, "rfi@contesting.com" <rfi@contesting.com>
Subject: Re: [RFI] New Interference at kk0sd
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Sun, 21 Mar 2021 22:07:48 -0500
List-post: <mailto:rfi@contesting.com>
I'm still troubled that it seems you can hear it only on the DX-88 antenna now that you've ruled out odd stuff in your '847. Here's another hare-brained idea: try using a different antenna in your shack. Doesn't matter what it is: 10' of wire stuck into the center of the SO-239 on the back of your rig. Obviously, don't transmit. Still hear it?

Kim N5OP

On 3/21/2021 9:36 PM, Gary wrote:
Kim,

        No it's a good idea. I just plugged my TECSUN PL-310 portable shortwave 
into my HF antenna (HyGain DX-88) when I do that I hear the noise on the 
portable...

        I do not have another HF antenna, other than a 14 AVQ in pieces in my 
garage.

        Keep the ideas coming!

73,
Gary "Joe" kk0sd

-----Original Message-----
From: RFI <rfi-bounces+gary_mayfield=hotmail.com@contesting.com> On Behalf Of 
Kim Elmore
Sent: Sunday, March 21, 2021 9:28 PM
To: rfi@contesting.com
Subject: Re: [RFI] New Interference at kk0sd

It's odd that you can't hear it on your portable rx. That made me
curious: What if this is something internal to your '847? Have you tried 
pulling your '847 and listening on a different receiver using the same antenna? 
If you have, do you still hear the noise? It's a long shot, but...

Kim N5OP

On 3/21/2021 7:28 PM, Gary wrote:
Mike,

                  Thanks for the info. I understand locating the noise is more 
important than identifying the noise. I am just try to play all the angles as I 
was hoping to work the WPX contest nest weekend. I have been walking the 
neighborhood a good chunk of the afternoon, and have not been able to hear the 
noise on my portable shortwave and loop antenna. It is as strong as ever on my 
home station.

                  I have an MFJ 852 Noise Finder and it seems to go crazy when 
broadside to any house. The neighbors on each side of me drive the meter full 
scale.

                  Yep I only want to knock on one door, as I know that can get dicey. 
I would rather place a call to a utility, but can’t really do either until I 
know.

                  Keep the suggestions coming!

Thanks and 73,
Gary “Joe” kk0sd

From: Mike Martin <mike@rfiservices.com>
Sent: Sunday, March 21, 2021 6:53 PM
To: Gary <gary_mayfield@hotmail.com>
Cc: rfi@contesting.com
Subject: Re: [RFI] New Interference at kk0sd

Joe I haven't had time to read all the other input but I can tell you it is not 
an arcing source or a sparking source. either one of the two would be much 
broader than what you're reporting. if someone were to tell you exactly what it 
is you really wouldn't be any further ahead. You would still have to find which 
residents or business it's in. My suggestion would be to either go mobile or on 
foot, preferably on foot listening to the frequency that you know the problem 
affects. once you locate the residents then go through the breaker scenario and 
locate what the source is. Be 100% certain of the structure or home that the 
problem is in before knocking on the door. The last thing you want to do is 
start guessing. Guessing we'll ruin the relationship with your neighbors.
Be safe,
Mike k3RFI
www.rfiservices.com<http://www.rfiservices.com>
Get BlueMail for Android<http://www.bluemail.me/r?b=16696>
On Mar 21, 2021, at 2:01 PM, Gary 
<gary_mayfield@hotmail.com<mailto:gary_mayfield@hotmail.com>> wrote:

My last problem was tracked down to a neon sign in a neighbors garage. I had 
several months of blissful relatively low noise operation, but now have a new 
RFI issue.

You can see a recording of it here:
https://www.youtube.com/watch?v=GKf4P44FXMo

I have turned all of the breakers in my home off and run the radio from a 
battery and the noise remains.

My neighborhood utilities are all underground.

There are no solar installations in my neighborhood, and the noise is there at 
night anyway...

The noise is not detectable on the AM broadcast band, but starts around 2 MHz 
and runs to at least 6 meters.

It is there 7 days a week 24 hours a day.

It is not detectable from my pickup when I drive the streets of my neighborhood 
(checking both AM broadcast and Shortwave).

If any one has heard something like this, I would love to hear what you found.

Thank You for your input and help!

73,
Gary "Joe",  kk0sd


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Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"A great second violinist plays second fiddle to no one." //– Robert C. Marsh, Chicago Sun-Times./

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