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#36
December 21st 07, 02:21 AM
posted to rec.radio.amateur.antenna
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Loading Coils; was : Vincent antenna
AI4QJ wrote:
"Cecil Moore" wrote in message ... wrote: It isn't just "any" -j567 ohm impedance that can cause resonance with a 43 degree 600 ohm line. Dan, I believe you will find that any -j567 impedance in the black box will put the forward and reflected waves back in phase, i.e. resonant. OK but if you can measure Zo of whatever is in the box, then you know the length by virtue of it being -j567. It should only take 2 terminals to measure Zo. Knowing Zo, then I can normalize the smith chart and directly read the electrical length in degrees. True, it would help to know that the box contains a transmission line. The "other side" will not allow you to assume a transmission line. The "other side" will not even allow you four terminals on your black box. The entire purpose of the black box, in this present context, is to confuse and confound the unwashed masses so the "other side" can maintain their guru status. -- 73, Cecil http://www.w5dxp.com |
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