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.

Martin

VE7MM

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of WE0H Mike
Sent: Saturday, July 09, 2005 5:36 PM
To: rsgb_lf_group@blacksheep.org
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.

--

Mike

WE0H

WD2XGI

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: <rsgb_lf_group@blacksheep.org>

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.

Joe