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Old July 15th 03, 11:15 PM
W5DXP
 
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Dr. Slick wrote:
Why would you need the antenna tuner in this case? Assuming your
XMTR is 50 Ohms on the output:

100W XMTR--50 ohm feedline--+---50 ohm load


Voila! A perfect match. No mis-matchlosses, and no need for a
tuner.


Yes, but a real-world antenna rarely has a 50 ohm feedpoint impedance
even though it is resonant. The feedpoint resistance of a resonant
1/2WL dipole can vary from about 40 ohms to about 100 ohms depending
upon its height above ground. And a resonant dipole won't usually
cover the entire 75m band without a tuner of some kind.
--
73, Cecil http://www.qsl.net/w5dxp



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