[TowerTalk] Resistor Across a Choke Balun

[Edward McCann]

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 at 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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