See my post to the other fellow and the links to Jim's site.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
On 2/25/20 6:37 AM, AA5CT via RFI wrote:
re: "What is best practice to keep RF out of audio and Mic lines? 160 through 10
meters."
Joe,
IN a nutshell (and for starters):
a) stay out of the near field of the antenna.
b) operate into a 'balanced' antenna (this rules out end-feds)
73, de AA5CT Jim
.
.
On Tuesday, February 25, 2020, 8:13:39 AM GMT-6, Joe <nss@mwt.net> wrote:
Want to make sure RF stays out of my audio and Mic wires.
Now I see many small clip on ferrites like these,
https://img2.freepng.es/20180420/bgw/kisspng-ferrite-bead-ferrite-core-electronic-filter-electr-bead-5ad99198298d83.5874384515242080241702.jpg
Now is it better to get some with a larger hole, so that multiple passes
can be made, like this?
https://www.gearslutz.com/board/attachments/remote-possibilities-in-location-recording-amp-production/610734d1480262732-led-lights-hum-how-best-deal-ferrite-chokes-_.jpg
And when it comes to doing multi pass if that is better to do,
What is best performance, just cram in as many turns as you can as seen
above?
Or wind the turns in an organized fashion, like a toroid inductor, where
the turns do not overlap each other, kind of like this?
https://i.ytimg.com/vi/LuMlM8zWQFk/maxresdefault.jpg
What is best practice to keep RF out of audio and Mic lines? 160 through
10 meters.
Joe WB9SBD
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