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On Fri, 26 Nov 2004 00:24:13 -0000, "Dave" wrote:
the 1/4 wave open end coax looks like a short circuit at the feed point. so your reading makes perfect sense. Dear Dave, Yes, I believe it does - that is, it makes perfect sense to have a low resistance and to have a near zero reactive component. What does not make sense is that the high SWR is supposed to produce outrageous losses. I don't see values that I can interpret as high losses - quite the opposite. Maybe I just don't interpret it correctly, but I would expect it to be several ohms - not 0.57 ohms. In fact, and this is where it gets ridiculous, the examples in the ARRL Antenna Book would lead me to believe that the above quarter wave line would exhibit 20 dB of total losses. In order to get those numbers the SWR at the load of say 8000 would have to decrease to 1.01:1 at the source end in order to account for 20 dB in losses. (See the example on page 24-9 of the 17th Edition.) Bob, W9DMK, Dahlgren, VA http://www.qsl.net/w9dmk |
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