A lot of the examples on K9YC's site show snap-on ferrites. Also the part
numbers for some snap-on models are shown in your "Ferrites useful to hams
for suppression and chokes" list. Of course we know from Jim's site that
to be effective at HF they require multiple turns. No reason was given by
WB8IMY as to why they were not effective and I assumed that they were
wrapped the same way that the solid cores were in his examples.
Subject: Re: [TowerTalk] Snap-on Ferrites
From: Jim Brown <email@example.com>
Date: Sun, 18 Jun 2017 20:00:35 -0700
He's absolutely correct. Many times I've posted a link to my tutorial on
the topic. I spent years learning how this stuff works, and months writing
it up. I won't repeat it here. Only the link. k9yc.com/RFI-Ham.pdf
73, Jim K9YC
On Sun,6/18/2017 7:44 PM, firstname.lastname@example.org wrote:
I was reading the recent QST article RF Mayhem by WB8IMY. The author said to
avoid using snap-on ferrites for problems caused by HF signals as they
rarely work well at HF. It is best to stick with circular cores.
Is this correct? I was not aware that snap-ons were less effective.
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