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Sorry, it's not clear from what you've said just what you're trying to
match to what. Truly, if you connect a 50 ohm load (be it a resistor, or some impedance transformed by a transmission line, tuner, or other means -- makes no difference) to a transmitter, and the transmitter's output impedance isn't 50 ohms, there will be a mismatch at the transmitter output. But who cares? Most transmitters are designed to work properly when terminated with 50 ohms, but that doesn't at all mean that their output impedances are 50 ohms. And it certainly doesn't affect the SWR on any transmission line connected to the transmitter. If you were to discover that your transmitter's output impedance were, say, 10 ohms and you connected it to a 10 ohm load, you'd have a very unhappy transmitter. All you have to worry about is presenting the transmitter with the load it was designed to work into, not what the internal impedance of the transmitter is. Roy Lewallen, W7EL Dr. Slick wrote: Roy Lewallen wrote in message ... Almost correct. The transmitter output impedance has no effect whatsoever on the line's SWR. Roy Lewallen, W7EL My point is that if the output impedance really was at a perfect 50 Ohms, then using a perfect 50 ohms transmission line, you can never match to anything other than 50 ohms. If the S22 is something other than 50 Ohms (usual case), then a transformation via 50 ohm coax about a constant VSWR is possible, for the purposes of matching to a not-quite-perfectly-50 ohms antenna. Slick |
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