"Reg Edwards" wrote in message
...

THE ONLY WAY TO ACCURATELY MODEL A LOADED VERTICAL
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All three sections have uniformly-distributed inductance, capacitance and
resistance per unit length. All calculable from dimensions.
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THREE CASCADED TRANSMISSION LINES SECTIONS.
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Now, you old-wives, what can be more simple than THAT? KISS!
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simple or accurate??? you can't have both. in this case you have ignored,
among other things, that the capacitance between each infinitesimal part of
each vertical piece to the rest of the world is different. therefore your
transmission line sections are not uniform from end to end as needed to use
the classical transmission line formulations. Then of course you must also
consider that the actual radiated part of the field makes those
'transmission lines' appear extremely lossy... unfortunately that loss is
not the R and G type loss as the transmission line formulas use, though
those losses do also exist.