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Re: [RFI] 160 meter noise at W9RE tracked down to neighbors Comcast Cabl

To: rfi@contesting.com
Subject: Re: [RFI] 160 meter noise at W9RE tracked down to neighbors Comcast Cable Box / Power Supply
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sun, 23 Feb 2020 00:42:31 -0800
List-post: <mailto:rfi@contesting.com>
On 2/23/2020 12:22 AM, Don Kirk wrote:
They are now going to work with Comcast and Mike to find a solution as a
power line choke made with a number 31 material Toroid core did not reduce
the RFI.

Don (and Mike),

Every cable connected to the box can be an antenna so it needs a choke. I'd start with the coax and power. Use the guidelines in the chasing noise app note below and the new HF choke cookbook, depending on the size of the cable you're choking and the frequency(ies) that are bothering you. See Fig 2 on page 2 and the associated discussion.

http://k9yc.com/KillingReceiveNoise.pdf

73, Jim K9YC
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