funkbastler wrote:
If, on each side of the feed point, a single conductor runs out
to point X, with individual conductors onward from X for each
band of interest, how far from the feedpoint can X be?

(like this) /10 meters
/
FP----------------X------15 meters
\
\
\
\20 meters

If this worked, we wouldn't need trapped tri-banders.

A 10m signal at X will test the three possible paths
and take the 20m one because it is a lower impedance.
The two shorter ones have very little effect at any
frequency.

The reason that real fan dipoles work is that the 10m
signal sees a low impedance at the feedpoint which is
not the case above.
--
73, Cecil http://www.w5dxp.com