Home |
Search |
Today's Posts |
#8
![]() |
|||
|
|||
![]()
David,
I do like your reply to Reg since it evokes more thought to the transmission line theory talk. But the main point Reg, is I believe that all the group is in in agreement with respect to current change and a 'large ' inductance, and those bonded to 50/60 hertz type thinking have fled. The only important thing left for some is to not over react at the knowledge that lumped loads are theoretical in nature since viewing same can provide advantages in solutions for networks whether it be household frequency or broadcast style frequencies. Knowledge is what is valuable, whether that knoweledge is inconsequential or not to ones needs. As far as our problems in the U.S.A. Reg. As I pointed out in a Letter to the Editor when presented with terrorism by the Stern gang in London the U.K. handed the problem of a homeland for Jews to the U.N. The U.N. never anticipated that the U.S. by virtue of its veto, would support an expansion of lands in the same way we did against the American Indian, forgetting that if you can't kill them all then you have a world wide conflict with respect to those who practice Islam. Cheers and beers Art "David Robbins" wrote in message ... "Reg Edwards" wrote in message ... THE ONLY WAY TO ACCURATELY MODEL A LOADED VERTICAL snip All three sections have uniformly-distributed inductance, capacitance and resistance per unit length. All calculable from dimensions. snip THREE CASCADED TRANSMISSION LINES SECTIONS. snip Now, you old-wives, what can be more simple than THAT? KISS! snip 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. |