At 10:10 PM 6/17/2005, VR2BrettGraham wrote:
>Remember, a rotary doublet (as in a non-reasonant dipole) will show
>good nulls off the ends. The direction(s) null(s) is/are seen off the
>sides & back of a beam can be even more helpful than where the
>signal peaks from.
I'd point out that not all beams have nulls directly off the back. Many
yagi designs have a lobe straight off the back with nulls somewhat off the
main axis.
Before you start trying to DF off of nulls, you'd better figure out where
the nulls are.
In that regard a rotary dipole is the most certain tool, because you know
there are only two nulls, and they're obvious!
Dave/K8CC
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