[Lf] [Fwd: LF: Ground Systems & long wires

[Andre' Kesteloot]

Tom Boucher wrote:

> Laurie asked for figures obtained by those with long wires. My 1100 ft
> wire (when it was in the air, which it is not at present), gave me
> approximately 4 amps of current with 400 watts. This indicates a loss
> resistance of 25 ohms, quite low. The series loading coil at the feed
> point is 0.8mH only.
>
> The wire was pretty much in a straight line except for the far 300 ft
> which was bent back in a large loop about 200 ft diameter.
>
> The initial ground was mains earth plus a single 3 ft long half inch
> copper pipe in the rather wet earth. There are a number of springs in
> the garden so the soil is quite wet. The garden is fenced with 6 ft high
> deer/rabbit fencing and this is now connected at one point to the
> grounding system. The field containing most of the antenna is also
> fenced but I have not as yet checked the electrical continuity.  As far
> as I remember, on connecting the fence, this gave a large, at least 50%,
> increase in antenna current.
>
> Sorry about the feet and inches - like Tesco, I have reverted to
> imperial measurements!
>
> 73, Tom G3OLB