[RFI] Sound Card

[Jim Brown]

On 9/15/2020 5:22 PM, David Eckhardt wrote:
> Lots of clamp-on ferrites with multiple turns through each at both ends of
> the cable.

Actually, the most important thing is proper bonding from chassis to 
chassis of all the interconnected gear, AND powering all the gear from 
1) the same outlet; or 2) outlets that share the same green wire; or 3) 
outlets whose green wires are bonded together at the outlet.

Lots of detailed advice on this in Ward Silver's ARRL book on Grounding 
and Bonding, and in a slide deck on my website that I've used for talks 
at Pacificon, Visalia, and to several ham clubs. Most of the material in 
the talk was incorporated into Ward's book, on which we collaborated.

73, Jim K9YC