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On Mon, 10 Nov 2003 00:50:55 -0800, Roy Lewallen
wrote: Ok. So far, we have your calculation that the output current should be 5% smaller, and 18 degrees shifted in phase (lagging, I presume) from the input; and Cecil's, that the output current should equal the current, both in phase and magnitude. I don't know if Richard is going to do the calculation or not, so I'll wait a little longer. Anyone else like to hazard a prediction? Roy Lewallen, W7EL (1) Input current = output current (2) No phase shift. If you model the circuit using the lumped values for the antenna R and jX components it's easy to see this. Anyone not believing this can try modeling the base inductor as: O----[0.3 ohms R']--[+j192 ohms]---[0.3 ohms R'']----0 Put current through it using your favorite SPICE simulator and compare the current through the R' and the R''. The two plots coincide. Jack K8ZOA |
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