On Sat, 5 Aug 2006 19:11:17 +0100, "Reg Edwards"
wrote:


After all, we already know enough quite enough about radial systems at
HF to design one which will work good enough, performance-wise, to
keep anybody happy. ( BL&E's work, as good as it may be, does not
apply at HF.)

Just lay one or two dozen radials, in ordinary soils, with lengths
equal to about half antenna height. Which is a good enough
rule-of-thumb for anybody who doesn't expect to win contests because
he has the advantage of 0.05 S-units.

And extremely few people know what their local soil resistivity is
within +/- 40 percent. It's largely guesswork!

Reg, G4FGQ

Hi Reg,

You're saying that BL&E's work doesn't apply at HF. I believe that's an
overstatement.

They've shown that with about 100 radials of 0.4 lamba length the result is
almost perfect ground, regardless of the ground conditions beneath the radials.

I contend that using the radial setup as described above will always result in a
near-perfect ground at any HF frequency, with close to 100 percent efficiency.

Would you not agree?

Walt, W2DU