I think 18" is overkill. In the broadcast industry we use 4" strap, which
considering today's cost of copper is very expensive.
----- Original Message -----
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
To: <Gary@doctorgary.net>; "Discussion of Ten-Tec Equipment"
Sent: Monday, April 06, 2009 7:23 AM
Subject: Re: [TenTec] RF Ground
> 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
> [actually via CAD WELD} all of my driven grounds. There's 3 at the base
> 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
> 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
> 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" <firstname.lastname@example.org>
> 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
>>> reference point for that antenna. Several antennas can share the same
>>> radial system. Also that radial system must be bonded back to the
>>> entrance ground.
>>> Bob, K4TAX
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