On Mon, 02 Apr 2007 07:12:41 -0700, dansawyeror
wrote:

The input to Reg's program is:
F 4 MHz
H 1 M
L 3.3 M
D 25 mm
A 98
B 70
R .7
G 40

This yields 3.2 Ohms input impedance. The coil can be made from PVC and
12 gage wire, the rod, wire, can be 1 inch copper tubing.

Reg's c_poise
program predicts a reasonable set of parameters, a 10 foot 'wire tube',
one meter up, and a coil in the range of 50 uH. The program predicts a
'ground' in the range of 5 Ohms.

How oversimplified is this?

Hi Dan,

By Reggie's own warning, it will suffer for being so close in
proximity to earth. He does, however, offer the advice (probably for
any construction) to allow enough surplus material to permit tuning.

I should point out that with any tool, its utility is comparing its
forecast with your results. If you do enough constructions against
that tool, and you look at the range of forecasts and compare to
results, you will build your own correction factors that will make
future constructions easier to accomplish.

This lesson was more what Reggie was trying to teach. Those who use
his tools without examination would be eaten alive by the Sewer Rats
of Rio.

73's
Richard Clark, KB7QHC