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On Thu, 28 Aug 2003 12:18:44 -0500, W5DXP
wrote: My basic approach is to achieve a Z0-match and therefore forget about source impedance. Hi Cecil, This is a cavalier attitude if you can afford it. Otherwise, those who so desperately hammer out the last 0.1 dB antenna gain are going to fall to their knees in wrack when they discover that their rig's characteristic Z of, say, 70 Ohms meeting the discontinuity of their low pass filter's 50 Ohms turns that effort into heat behind the antenna jack. I have long since stopped being surprised by those who spin on like whirling dervishes over trivial matters in the face of 10 fold losses in front of them. This, of course, is even more trivial when they gush on about their premium equipment that behind the knobs "efficiently" transforms 20 - 25 Amperes of DC current into 100 Watts RF. Now, that puts perspective to the topic: smoke and reflection coefficient. 73's Richard Clark, KB7QHC |
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