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Richard,
You are at it again, avoiding the supply of corroberation to what you say is true. Stick to the basic statement that you made, which from their silence, the gurus concur with. Your statement was that: propagation is what determines TOA and I ask for confirmation of the correctness of that statement from you in the nature of some written text. The gurus obviously accept your statement as fact, but I do not. Usually you refer to a text to back up your statement ,but this time you haven't, winging it and relying solely on the fact that the gurus agree with you. Surely you or some guru can come up with a written text that states that propagation is what determine TOA.! That is what this group is all about where gurus debunk the untruths and supply the real truths and not to let old wives tale dominate. You also stated that you made the ":assumption" presumably based on the "facts" stated above that the Curtain could be considered as similar to the dipole since propagation determines that they are the same. This is total junk ,in its entirety, unless you or the gurus can come up with a written text that confirmes their positions. Art "Richard Harrison" wrote in message ... Art Unwin wrote: "---may I go back to the "compared to a dipole" statement which Richard keeps brushing off." I accept a resonant dipole reference as a given. It is true that the antenna under test and the reference dipole have different radiation patterns. Our goal was to compare received signal strengths at locations of interest. The assumption was that on average, the propaqgation was nearly the same for the signals received from both transmitting antennas. Good or bad propagation, the difference between the signals depended on gain in the direction of the receiver as the transmitted power was the same to both antennas no matter where it landed. Kraus says on page 535 of his 3rd edition of "antennas": "Suppose that we express the gain with respect to a single lambda/2 element as the reference antenna. Let the same power P be supplied to this antenna. Then assuming no heat losses, the current Io is the sq rt of the power divided by the resistance of the reference antenna. In general, the gain in field intensity of an array over a reference antenna is given by the ratio of the field intensity from the array to the field intensity from the reference antenna when both are supplied with the same power P." Kraus` example was our intended case. Our expectations were met and our contractors were paid. Best regards, Richard Harrison, KB5WZI |
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