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#10
September 8th 03, 11:52 AM
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"Dr. Slick" wrote in message om... "David Robbins" wrote in message ... "Dr. Slick" wrote in message m... (David or Jo Anne Ryeburn) wrote in message .. . ok, i quit... i have shown several times that the calculation of vswr from rho only applies in ideal lines, you can not use it in lossy lines because of the simplifications that went into deriving it. if you insist on harping on this point how can you ever open your eyes to see the rest of the errors in your calculations. 25' of RG-8 isn't THAT lossy. Once again, where and when and how did you do a measurement? When you get a rho greater than 1, the VSWR = (1 + |rho|)/(1 - |rho|) gives ridiculous NEGATIVE SWRs. And rho WILL give you the SWR, assuming your tranmission isn't extremely lossy. This is why people say that the SWR meter has to be at the antenna, instead of at the end of 100' of RG-58. You are quitting because you can't really answer this question. Slick you really are hopeless... that formula for VSWR is not valid when the line has losses, and you can only get rho 1 when the line has losses.... see the catch 22???? |
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