I think the query had to do with static-relieving resistor or choke across his
antennas terminals effective at DC, if I read it correctly.
Ed McCann
AG6CX
> On Jun 30, 2022, at 3:34 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
> On 6/30/2022 2:57 PM, KD7JYK DM09 wrote:
>> I've looked on and off over the years for a tutorial, but not had any luck,
>> can anyone suggest a route of study for me?
>
> Yes. k9yc.com/RFI-Ham.pdf includes an extensive tutorial on how ferrite
> chokes work, as well as a lot of other fundamental EMC concepts.
>
> k9yc.com/publish.htm includes two choke "Cookbooks," one for MF/HF, another
> VHF/UHF. The MF/HF cookbook is based on more than a year of winding and
> measuring more than a thousand chokes; the VHF/UHF cookbook is based on
> Fair-Rite data sheets for specific cores. This material has been in the ARRL
> Handbook for a while.
>
> There's also an applications note on identifying RF noise by type and
> providing advice on how to locate and kill it. It includes winding guidelines
> for clamp-ons at the source of noise.
>
> 73, Jim K9YC
>
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