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John Popelish wrote:
I am still having a bit of trouble visualizing how the coil was instrumented and terminated to get this result. I am also a beginner when it comes to S parameters. I think Tom did what I did the other night. I hooked the coil across my IC-756PRO's output, used minimum power, and tried to supply 4 MHz power to the 4+j1250 ohm coil that I have. It naturally rejected (reflected) virtually all of that power. I found, as Tom did, that the standing wave current at both ends has virtually identical phases but that is already known. The delay through the coil simply cannot be tested in that test arrangement. Tom just repeated Roy's experiment of a few years ago and obtained the same meaningless results. So did I so I didn't even bother to report them. My reservation with you and few others is your emotional investment in being correct. It makes your opinions less trustworthy. Whoa there, I just made a mental blunder about radiation resistance and readily admitted it. My emotional investment is in fighting falsehoods, myths, and old wives' tales. That's all. The test method for determining the delay through a piece of transmission line or a coil is the same as it has been for more than a century. Find the 1/4WL self-resonant point and calculate the delay. Other methods, resulting in far different results, are obviously invalid. -- 73, Cecil http://www.qsl.net/w5dxp |
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