Reg Edwards wrote:
It's a waste of time mentioning things like DIP.TL.EZ and EZNEC4.
Hardly anybody has ever heard of whatever they are. I certainly
havn't. And the chances of obtaining them, even if legal, within the
next 12 months is so remote, by then, everybody will have forgotten
what it's all about and will have lost interest in the subject.

EZNEC is available in a free demo version from www.eznec.com
You can enter dielectric constant and thickness of insulation.

If you have any facts to say then say them. It's up to you to be
convincing.

I once replaced an uninsulated loop with insulated wire to
try to reduce wind static/noise in AZ. The resonant frequency
went down by about 200 kc on 40m.

As things are, your velocity factor reduction of 7.8% does not go out
of the ball park value predicted by my formula.

Maybe I misunderstood. I thought you were saying insulation
has no effect.

My formula takes a few milliseconds to calculate. Whereas your method
requires a 4-weeks training course and several hours making the model.

Some training is worth it. My training using ELNEC and later
EZNEC has been very valuable. I certainly wouldn't spend "several
hours" on a model only to report the results in one thread on
this newsgroup. That's not enough return on investment. It took
me about seven minutes for that last report.
--
73, Cecil http://www.qsl.net/w5dxp


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