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I apologize. I read and was referring to the same quote, and interpreted
it to mean that the first measurement was made with the coil at the base of the antenna. So where was it -- 78" from the bottom? Roy Lewallen, W7EL Yuri Blanarovich wrote: On his web site, Yuri quoted W9UCW as measuring the currents at the ends of a toroid mounted at the base of the antenna as being 100 mA at the bottom and 79 at the top. You must, then, believe these measurements to be in error. Roy Lewallen, W7EL Not! Here what Yuri has on his web site, quote by W9UCW: "Because of the constant claim that this must be due to the fact that the coil is so big compared to a wavelength, I measured the in and out current on a TOROIDAL loading coil used on a 20m mobile antenna. It was a 78" base mast (including spring and mount) with a 38" top whip (including 12" of alum. tubing for adjustment). Below --100ma & Above --79ma When I moved the coil to the top of the mast and made a horizontal "X" top hat to resonate it back on the same freq, I got Below --100ma & Above --47ma So, It happens even in a totally shielded loading coil with miniscule power going thru it! Kirchoff has no laws about current being the same on both ends of inductors. His current law is about one POINT in a circuit and his voltage law is about a closed loop." He described exactly how it was done, definitely not at the base. Yuri |
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