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Re: [TenTec] RF Ground

To: <Gary@doctorgary.net>, "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] RF Ground
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 6 Apr 2009 09:23:14 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>

Here's what Jerry had to say and I agree:


If you really want lightning and RF grounding, those ground sources need
to be connected together with wide  copper strap. 18" is a nice width.
Otherwise the inductance is too much to be totally effective.

73, Jerry, K0CQ
end quote:

The 18" copper strap that Jerry suggests would be nice but would also be a 
nice investment today.

In my case I use a piece of 1/2" copper refrigeration tubing to connect/bond 
[actually via CAD WELD} all of my driven grounds.   There's 3 at the base of 
the tower in a ring and 1 at each corner of the house.  The house has a 
series of lightning rods across the top.  All of these points are connected 
together.  Also, the mast out the top of the tower has 2 bonding flexible 
straps between the mast and the tower sleeve.  This assures that the mast is 
bonded to the tower and the path is not through my rotor.

Yes, in your case, the path between your service ground and your antenna 
ground is through your station equipment via the coax.  Not good!

Bob, K4TAX


----- Original Message ----- 
From: "Gary Smith" <Gary@doctorgary.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Monday, April 06, 2009 5:05 AM
Subject: Re: [TenTec] RF Ground

> Hi Bob,
> My antennae use the same radial field of 60 or so 130' radials. The
> radial plate is 360' from the house. The only connection between the
> house and the radial field is via the coax shield. Are you suggesting
> I run a length of additional wire from one of the radials to the
> grounding point of the service entrance ground rod?
> Gary, KA1J
>> As to having a RF ground,  a ground radial system below your antenna is 
>> the
>> reference point for that antenna.  Several antennas can share the same
>> radial system.  Also that radial system must be bonded back to the 
>> service
>> entrance ground.
>> 73
>> Bob, K4TAX
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