Grounding cable gauge size

Ralph is spot on. Get your ohmmeter out and discover how your connections are connected to either one another or to ground.

I have 2 earth ground rods. The first is purely the Puritan unit green ground wire through the Groundmaster device.

The second ground rod takes all my "signal grounds" out via a DIY ground box. But note that the signals are in many cases connected to the power ground through the chassis. A potential ground loop situation. So I ran a separate ground rod to make it a longer path, so to speak. I only use 12 ga "Romex" for each rod wire. About 20 feet for each to get me to Mother earth.

I’ll try to attach some photos of my DIY box. I braid 18 or 20 ga wire for my cables from components to the box to make it look sexier and use alligator clips or banana jacks.

I am only 20% successful posting pics here.

Some weight to the box via a bag of quartz and tourmaline.

I wired it with some Jena Labs wire I had left over from another project.

Rochelle salts are getting difficult to find lately.

I also use the 3M EMI absorbing material with the adhesive backing in my boxes, usually on the last surface away from the item being "absorbed".