Dear J,
On Mon, 10 Jan 2005, J. Allen wrote:
Alex, Thank you for your continuing help. I am retired and live on a
fixed, small income. Litz (sp?) wire in not being considered.
Solid coper wire yelds Q-factor about 1/2 of Q-factor with Litz. Certanly
with solid wire nice Q-factor is also reachible. But wireing step should
be twice of wire diameter. If wire is too thin then coil wil be too short
(optimal lenght of coil is about 1/2 of coil diameter).
How big does the elevated counterpoise need to be at LF to be effective?
This can be illustrated by picture in attachment. But I should to note
this is result of my original theory only. It is NOT tested experimentaly.
So I am not absolutely shure this is not wrong. I have compare this
theory with nec-2 modeling with Sommerfeld-Norton ground description.
It much very well. But this is for elevated conterpoise only.
NEC-2 can not modeling burred conterpoise unfortunely. NEC-4 is not
reachable for me. For experimental testing I have no oportunety also. No
such a site...
73 de RA9MB/Alex
http://www.qsl.net/ra9mb
conterpoise.pdf
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