On Sun, 19 Jun 2005 01:59:51 GMT, Owen wrote:

Hi Owen,

Between:

I have looked at it and I can't see that I said "power" in relation to
Antenna Factor. Perhaps I am blind. (You didn't confuse the units dB/m
(dB per meter) with dBm (db wrt 1mW) did you?)

and:

I have gotten sidetracked here, my real interest is the completeness /
accuracy of the loop model.

I have observed that your Mathcad design is short of providing
something of a self-check feature. No where in any of your formulas
do you use Units.

Yes, you label them as notes, but this is risky and has been revealed
in your first comments in response to Ed's comment:
Looks pretty decent, until the very end. Antenna Factor (AF) is the ratio of
the field strength voltage to the output VOLTAGE, not power, although you
did get the numbers right.

Folks who follow your math work, will be skimming it, and perhaps a
few will be transcribing it while others will have picked up your MCD
file. This is to say, very few will actually go the whole distance
for a sanity check.

That sanity check is to include the Units within the formulaic Mathcad
expression; that is, after all, one of the boons of using this
package, otherwise any spread sheet would do as well. This inclusion
would enforce a strict compliance with keeping every transformation
accurate, and you would not end up mixing terms which is very simple
to do - and later suffer from. Cecil's work with Photonics suffers
from this problem horribly such that expressions of power end up in
terms so bizarre and thoroughly out of whack that anything could be
proven, except the proof.

73's
Richard Clark, KB7QHC