[TowerTalk] Fw: ground

[kb9yku]

At 10:59 PM 4/18/03 -0400, Van Fair wrote:

>----- Original Message -----
>From: Van Fair
>To: towertalk-request at contesting.com
>Sent: Friday, April 18, 2003 11:16 AM
>Subject: ground
>
>
>The power company in my area offers a whole house surge protection system 
>which mounts behind the meter for $5 per month. I recently had it 
>installed in my home. They installed a new meter ground rod which changed 
>my ground from 150 ohms to 65 ohms. In talking to the installer I told him 
>about my ground at the tower which measured 120 ohms and the ground at my 
>rig which measured 195 ohms.  Since I have 3 ground systems There is 
>potential for a problem.
>
>The tower grounds and the rig grounds are connected via the 5 coax shields 
>which are all grounded to the rod at the base of the tower. . All the rig 
>and tuner grounds go to one point on the operating table and from there 10 
>feet to another  10 ft  ground rod.  The rigs are also grounded through 
>the AC cords to the house ground.  Question? Should I tie my central 
>ground point on the operating table to the house ground via the ground on 
>the 240 volt  plug.  Do I have a potential problem. Suggestions.
>
>By the way the power company used a chemical welding device called a 
>oneshot GR1161G to weld the ground wire to the ground rod. Its a small 
>ceramic tube which fits over the rod and burns gunpowder and a starter to 
>develop heat to make the weld
i was thinking cadweld was the name for that system
look at http://www.contractconnections.co.nz/cadweld.shtml
there is lots of makers making about the same systum




>. A neat little device. He also used a 120 volt device like a big drill 
>which drove the rod in the ground in 30 seconds. NEAT.

i have used a hammer drill the kind that will  use 6 in core drill bits
the $200-400+ power drill


>_______________________________________________
ken
kb9yku