Your programs results also dramatically disagree with Brown, Lewis,
and
Epstein's data in one of the most comprehensive radial studies ever
done.

73 tom

=========================================

All three of B,L & E forgot to determine ground resistivity and
permittivity. That's hardly comprehensive!
----
Reg.

Reg Edwards wrote:

Your programs results also dramatically disagree with Brown, Lewis,
and
Epstein's data in one of the most comprehensive radial studies ever
done.

73 tom

=========================================

All three of B,L & E forgot to determine ground resistivity and
permittivity. That's hardly comprehensive!


Do your predictions fit BL&E's measurements, or those of Sevick, for
*any* assumed values of ground resistivity and permittivity?

Also , please tell us more about the fan of 1.0m radials, on the ground,
that will give ninety-several percent feedpoint efficiency.


--
73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek

"Ian White wrote
please tell us more about the fan of 1.0m radials, on the ground,
that will give ninety-several percent feedpoint efficiency.

==========================================

Ian, you must have had no experience of a few short radials.

Try 16 or 32 radials, 1 or 2 metres long, in good soil, with a 1/4 or
3/8-wave vertical or inverted-L antenna. Radiating and receiving
efficiency will surprise you. Also at all higher frequencies.

At your new QTH you may not find much good soil. But try it anyway.
Or persuade someone else to try it.

I managed for many years with 7 radials 2 metres long, covering an
angle of only 90 degrees. Soil resistivity was only 70 ohm-metres.
Unfortunately, had to abandon it when the garden was turned into a
patio. Damned concrete!
----
Reg.

Reg Edwards wrote:
Try 16 or 32 radials, 1 or 2 metres long, in good soil, with a 1/4 or
3/8-wave vertical or inverted-L antenna. Radiating and receiving
efficiency will surprise you. Also at all higher frequencies.

That sounds like scientific validation of a program or theory, compared
to all the work Brown, Lewis, and Epstein did with field strength
meters.

Maybe that's where S units came from?
S-urprise units?

At your new QTH you may not find much good soil. But try it anyway.
Or persuade someone else to try it.

....and they will be able to quantify what? Emotions?

I managed for many years with 7 radials 2 metres long, covering an
angle of only 90 degrees. Soil resistivity was only 70 ohm-metres.
Unfortunately, had to abandon it when the garden was turned into a
patio. Damned concrete!

I managed with a ground rod. I managed 12 dB better with radials.

Who was it that said if you can put a number on it you don't understand
it? Someone in England I think.

73 Tom