[Elecraft] [K3] GFI outlet, 100W on 20m, and *poof* (RFI?)

[John Shadle]

Hi all,
I realize that this is tangentially related to Elecraft gear since I'm
using a K3 and experiencing this issue, but I thought someone else may
have some knowledge to share with me to help me solve my problem.

Recently I stopped using a 25' long extension cord to power my
computer, power supply, and other accessories and installed a 2 gang
box directly off of the main electrical panel, where my shack happens
to be (in the basement). While our basement is waterproofed, it still
has a concrete floor, which "requires" a GFI outlet (according to my
electrician). To do my due diligence, I installed one GFI in the 2
gang box and 1 regular 3-prong grounded outlet. I have my shack
computer, my power supply, and my transformer for my SGC SG-231
autotuner plugged into this.

Last night I tuned up (15W) 20m and was hoping to work some DX. My SWR
showed <2.0:1 on my SWR meter and on the K3. All is good. When I keyed
down with 100W, the GFI tripped and my shack computer, power supply,
etc. shut off.

I'm using Leviton smartlockpro 20A GFCI outlets from Home Depot.
They're not "cheap", but maybe they don't have adequate RFI protection
(obviously).

I suppose the first solution is to remove the GFI from the situation,
but I thought using it was the "right thing to do". Any personal
anecdotes or advice would be welcome.

Thanks!
-john W4PAH
Madison, WI