On Thu, 6 Sep 2018 18:14:51 +0100
Gareth's Downstairs Computer
wrote:

On 06/09/2018 17:22, Jeff Liebermann wrote:
On Thu, 6 Sep 2018 14:46:33 +0100, Gareth's Downstairs Computer
wrote:

Interesting because between the house TT earth, a steel rod and the
copper RF earth is now about 0.4 volts, making the ohmmeter go
haywire trying to measure the resistance between them.

That's only true if there's an electrolyte between the copper and
steel. When bonded together, there's no galvanic action or voltage.
If you're using two or more ground rods, all electrical codes
specify that they need to be connected together with some heavy
gauge wire.

Separate RF earths to reduce noise on RX and protect family members
from RF hazard if touching central heating radiator 1/4 wavelength
away.


Gareth, get some double glazing, Gareth, that would stop them huddling
around the radiators, Gareth.


Gareth, Thanks, Gareth.