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Old March 6th 07, 04:30 AM posted to rec.radio.amateur.antenna
Roy Lewallen Roy Lewallen is offline
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First recorded activity by RadioBanter: Jun 2006
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Default Measuring Antenna Efficiency

Wayne wrote:
"Roy Lewallen" wrote in message


There is no relationship between SWR and efficiency.

Roy Lewallen, W7EL


Agreed. For example, SWR into a dummy load. The equation given was just to
show the approximation I was trying to make for the dipole case.


I don't seem to be communicating well, but that's not unusual. It's a
shortcoming I have. So I'll try again.

There is not even an approximate relationship between SWR and
efficiency, so what you calculated was not an approximation of the
efficiency. It was simply a number which has no relationship whatsoever
to the efficiency. You could have used any equation you might dream up,
and the result would be as meaningless as the result you got.

Roy Lewallen, W7EL