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Jim Kelley wrote:
Cecil Moore wrote: Yes, but the delay is not measurable using standing wave current because standing wave current doesn't change phase in a coil or in a wire. But you aren't measuring it. The point is, it's calculable. But w8ji and w7el *are* measuring it and getting something different from those calculations. They are reporting their flawed measurements as technical fact. That's what the whole argument is about. There is no way in heck to get a 3 nS delay out of a 100 turn, 10", 2" diameter coil. It is more useful for determining the delay through the coil. The fact that it doesn't give you an answer that agrees with any other method notwithstanding. It means that the existing posted methods are invalid. And that doesn't extend just to the side that asserts the delay through the coil is close to zero. It also extends to the other side who accepts the use of standing-wave current as a valid measurement technique. *All* of the measurements made using standing-wave current are bogus. If I were trying to measure delay I would use pulses. How do you know the pulsed delay is the same as the steady-state delay? Has anyone published a delay using pulses? I'm not saying a pulsed delay won't yield valid results - I just don't know. If it is a DC pulse, there would be known problems. I would want the system to be configured in exactly the same way as I intended for it to be used. Then you will find it is impossible to measure the delay through the coil during steady-state. -- 73, Cecil http://www.w5dxp.com |
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