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.

Ohmmeter? Use a ground resistance tester. Ask any electrician if you
could borrow one:
https://www.google.com/search?q=ground+resistance+tester
https://www.fluke.com/en-us/products/electrical-testing/earth-ground
https://www.fluke.com/en-us/learn/best-practices/electrical-inspection/earth-ground-testing-why-it-matters


--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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.

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.

On 9/7/2018 9:06 AM, Stephen Thomas Troll wrote:
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.



I had a radiator that rusted through....just thought you would like to
know that ....

On Fri, 7 Sep 2018 09:21:15 +0100
"Jim GM4DHJ ..." wrote:

On 9/7/2018 9:06 AM, Stephen Thomas Troll wrote:
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.



I had a radiator that rusted through....just thought you would like
to know that ....


Jimbore, too tight to buy inhibitor, Jimbore?



Jimbore, Thanks, Jimbore.

"Stephen Thomas Troll" wrote in message
...
On Fri, 7 Sep 2018 09:21:15 +0100
"Jim GM4DHJ ..." wrote:

On 9/7/2018 9:06 AM, Stephen Thomas Troll wrote:
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.



I had a radiator that rusted through....just thought you would like
to know that ....


Jimbore, too tight to buy inhibitor, Jimbore?



Jimbore, Thanks, Jimbore.

it was at the van and the previous owner didn't even have anti freeze in it
never mind inhibitor....no big deal the rad was £20 at screwfix.....