Re: [TowerTalk] Resistor Across a Choke Balun

[Jim W7RY <jimw7ry@gmail.com>]

You are correct Ed.

73, Jim W7RY

On 6/30/2022 7:01 PM, Edward McCann via TowerTalk wrote:
> 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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