Return to KLUBNL.PL main page

[Top] [All Lists]

Re: LF: Re: Mains Earth/Service Ground

To: [email protected]
Subject: Re: LF: Re: Mains Earth/Service Ground
From: WE0H Mike <[email protected]>
Date: Sat, 09 Jul 2005 23:55:43 -0500
Delivery-date: Sun, 10 Jul 2005 05:56:07 +0100
Envelope-to: [email protected]
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax)
Do it. Very interesting to see the test data. Maybe I can try again with a LF vertical in the trees but use the power grid as the counterpoise rather than my 3000+ feet of radials.


Scott Tilley wrote:
So what does all this mean for?  The mains run around me in circles...  Maybe Bill is right I need to couple in with my antenna being one side of the xfmr...
----- Original Message -----
Sent: Saturday, July 09, 2005 7:37 PM
Subject: LF: Mains Earth/Service Ground

A different operating paradigm, but in the mid 80’s as G4EZG I once had a 160M rhombic hung out over a valley…8 wavelengths of wire.


Feed at 120 ft… terminated apex, facing SW, at >250 feet on a catenary across avalley.


I have no doubt that AFTER the EXTENSIVE bonding (many miles/kM) of local farmers’ wire fences resulted in a SIGNIFICANT performance enhancement…quite empirical, never measured field strength -  but then regularly got accused of running illegal QRO and had some great trans-Atlantic DX at times when it ‘should not’ have occurred.




From: WE0H Mike
Sent: Saturday, July 09, 2005 5:36 PM
To: [email protected]
Subject: Re: LF: Re: Mains Earth


Maybe roll out a few miles of ground radials with the fence wire you buy at the farm store? I would think if he laid down at least two or three full quarter wave radials that the antenna current would go up. I think the wire costs $17.00 US for a 2640 foot roll. It's gotta be better than nothing.


Alan Melia wrote:

Hi Joe if you look back to Jim's field strength measurements he found that
he got anomolous results when he was near overhead lines (power or
telephone) that ran away from is TX site. There is no doubt that these go
act as "guide" for RF, but we have all measured substantial reductions in
ground loss ( as measured by bridge) when the mains earth is included in the
grounding regime. (This does not work for everyone though) If this was the
case I would have expected your antenna current to increase when you connect
the mains earth.....strange.
Cheers de Alan G3NYK
----- Original Message -----
From: "Joe Craig" 
To: <[email protected]>
Sent: 09 July 2005 12:50
Subject: LF: Mains Earth
Dear Group,
Thanks to Alan, Laurie and Wolf for their info on the mains earth.
At this station, there is one transmission line that runs in front
of the house and another about 1 km to the south that runs
roughly perpendicular to it so the mains earth grid is a bit sparse.
When doing mobile FS measurements, I noticed that the signals
were always stronger near the mains lines and suspected for a while that
the signals were being conducted along the lines rather than being
radiated. This was put to rest when Alan copied the sigs 2 years ago.
Thanks to G3AQC and Hartmut for the signal reports.

<Prev in Thread] Current Thread [Next in Thread>