[RFI] Clamp-on Ferrites

[Dan K2YWE]

Thanks, 31. Got it.
73, Dan


On Sun, Jun 26, 2022 at 4:33 PM Jim Brown <jim at audiosystemsgroup.com> wrote:

> On 6/26/2022 1:11 PM, Dan K2YWE wrote:
> > Any suggested snap-on cores or other ideas?
>
> k9yc.com/publish.htm
>
> Snap-on cores are optimized for VHF. To make them effective at HF, we
> must wind multiple turns through the RIGHT cores. Fair-Rite #31 is the
> ONLY good solution.
>
> Study the app notes on RFI on my webpage. The appendix to
> k9yc.com/RFI-Ham.pdf
> includes part numbers and sources. The winding guidance in the app note
> about Killing Receive Noise applies directly to interference TO home
> entertainment systems.
>
> Also, pay attention to the material in the link about "Pin One Problem,"
> which is a major cause of RFI. EVERY cable connected to equipment is a
> receive antenna for our signals that excite Pin One Problems. CATV and
> speaker cables are some of the "best" antennas.
>
> 73, Jim K9YC
>
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