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On Mon, 14 Dec 2009 23:33:45 -0600, brian whatcott
wrote: Wayne.B wrote: On Mon, 14 Dec 2009 19:04:12 -0600, brian whatcott wrote: If a coax gets a 50 ohm lossy resistance, then it soaks up all the power with no reflection. That's where I'm coming from... And so am I. A long length of lossy cable will show no reflected power which translates to an SWR of 1:1. Then we are agreed that a SWR reading can be misleading in this circumstance. It depends on your expectations. An SWR meter is not the right tool for evaluating the condition/quality of coax. For that you need a stable signal source, a dummy load and a good watt meter like a Bird. The ratio of power in vs power out translates to the loss in dbs with a little calculation. |
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