[TowerTalk] RADIAL Questions and Answers

[k6ll@juno.com]

On Mon, 22 Dec 1997 08:27:39 EST CQ K8DO <CQK8DO@aol.com> writes:

>3... At frequencies away from resonance you will have reactance, 
>expressed as +/- J  , which affects the SWR bridge reading...
>There are combinations of J and Z which can make the SWR bridge
>look pretty good, while the antenna itself is hoplessly mistuned.

Actually, minimum swr occurs at resonance. For example, if the
antenna is 25 ohms at resonance, the swr = 2.  If the frequency
is changed such that the impedance is 25+j43, the swr = 3.7, even
though the impedance is 50 ohms. You can see how it works on
a Smith Chart. (Remember those?)

Happy holidays to all.

Dave Hachadorian, K6LL
Yuma, AZ
K6LL@juno.com



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