Horizontal long wire MW aerial.

[pwdrive]

There will always be some sort of potential gradient in the earth, measuring ohms between PME earth (house earth) and a TT earth rod I found impossible because of that potential gradient when I was converting the chalet to TT, a loop impedance test was the only way.

Also with a separate RF earth there will be in effect an earth loop that includes all the house mains wiring etc.

Lawrence.