[RFI] A source of RFI

Dave Cole dave at nk7z.net
Mon May 29 20:24:32 EDT 2017

I grounded the computer case to the computer ground on the motherboard, 
then the case to an actual ground buss, and the ground buss is connected 
to an actual ground.

Following that I added a few mix31 ferrite's to the DVI cable for the 
monitor, one at the monitor end, and one at the computer end, and one in 
the middle...

All of my computer/monitor RFI ended with those steps.

73s and thanks,

On 05/29/2017 09:14 AM, Kenneth G. Gordon wrote:
> Hmmm...well, yesterday, I found that a source of RFI on (at least) 40 meters is the desktop
> computer sitting on my operating bench. RFI changes with changes in the "scene" on the
> screen.
> Turning off the 'pooter resulted in noise level dropping to S-1 (transceiver in narrow CW) on
> selected frequencies.
> I'm not sure at this point how to fix this, but I'll be working on it.
> What brought it to my attention was a weak but steady carrier on 7053, which would
> disappear when I changed to a different piece of software on the 'pooter.
> Sigh.... :-(
> If it isn't one thing, its another.
> Ken W7EKB
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