Excellent! We can't attach files here, but you can download it. His website
is k9yc.com. Download the rfi-ham PDF. There is no better information about
common-mode chokes available anywhere else.
73, Mike
www.w0btu.com
On Mon, Nov 12, 2018, 5:02 PM Arthur Delibert <radio75a3@msn.com> wrote:
> David --
>
> Suggest you take a look at the attached paper by Jim Brown. I live in a
> fairly dense suburb where every house (including mine) has all the latest
> RF noise-makers. Following Brown's suggestions, I've put large 31-material
> clamp-on ferrites on both ends of my receive antenna feedlines (and
> sometimes one in the middle), and it makes a very clear difference.
>
> Regards,
> Art Delibert, KB3FJO
>
>
> ________________________________
> From: Topband <topband-bounces@contesting.com> on behalf of Rodman, David
> <rodman@buffalo.edu>
> Sent: Tuesday, October 23, 2018 6:41 AM
> To: topband@contesting.com
> Subject: Topband: Common Mode
>
> I purchased some 7mm dia snap on cores for RG6 receive antenna coax. I
> was wondering if anyone had any experience or suggestion as to how many one
> would place on each lead. The feed lines are about 50% on the ground with
> grass growing over or buried 2-3". The lengths vary from 300' to 750',
> depending on the antenna I am using for listening. I was planning to place
> them inside the station. I have nothing now and thought this would be
> acceptable versus removing connectors and placing beads? Thank you.
>
>
> ---
> David J Rodman MD
> Assistant Clinical Professor
> Department of Ophthalmology
> SUNY/Buffalo
>
> Office 716-857-8654
> _________________
>
>
_________________
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