Topband: Mother of all ferrite common-mode coaxial chokes

[Tom W8JI]

> In my situation I have no control over RF grounding of the equipment since
> the foundation is sitting in a hole blasted out of rock. Dirt all over the
> property is only 1-2' on average.

Grounding of equipment on the desk has nothing to do with TVI or RFI, unless 
you have terrible antenna common mode or other cable issues bringing RF into 
the shack, or cable or connector issues in  the shack.

If earth was important, satellites and airplanes would have huge radio 
problems.

I think the myth that filters and equipment needs to be earthed comes from 
the false idea that filters divert unwanted signals to earth. Earthing is 
for low frequency and AC safety, unless you run a longwire from the desk 
tuner.

73 Tom