Richard,

What coupling does this imply? Is it direct as is contact or is it a
field coupling as capacitive or inductive? The question is: what would
insulation or corrosion due to buried radials?

- Dan

Richard Clark wrote:
On Sun, 08 Apr 2007 20:20:36 -0700, dansawyeror
wrote:

To focus on the question is: Why is the ground resistance so high?

Hi Dan,

Focus on Why? Why? This is something that you have absolutely no
control over without a huge investment in new dirt several 10s of
meter deep out to at least as far as the antenna is tall.

You want less resistance? then dig a hole and fill it with quartz
sand. Build a dune to drive the loss down further.

A suitable substitute is to lay out a ground field (radial wires). The
more the better. Here is the Why? you should be asking (Why more
wires?).

The path through the earth is shortened between adjacent ground wires.
Less path, less loss. The earth current travels not IN toward the
center as the radials do. The earth current travels ACROSS or
circumferentially towards the radial wires. This is due to the phase
lag between the induced earth current and the radial current. The
greater the distance between radials, the more path loss from the
average distance between the radials, to the radials.

As this is very difficult to treat in words alone, it is undoubtedly
confusing in the description above.

73's
Richard Clark, KB7QHC

On Mon, 09 Apr 2007 08:21:36 -0700, dansawyeror
wrote:

What coupling does this imply? Is it direct as is contact or is it a
field coupling as capacitive or inductive?

Hi Dan,

Yes to all three.

The question is: what would
insulation or corrosion due to buried radials?

Not much, practically; unless the wire is extremely thin, and the
currents are large. Loss is in the earth. You can, of course, build
a very crummy radial system if you try hard. For instance, using
expensive piano wire in place of cheap house wiring.

73's
Richard Clark, KB7QHC