That's not actually true. Stacked yagis are only optimized at one
frequency, but they are pretty tolerant of that spacing. LOTS of hams
have stacked multi-band tribanders and they do have worthwhile
additional gain on all three bands. If positioned at the right height
they also have the advantage of at least partially filling in the nulls
that would otherwise exist with a single antenna.
You can verify all of what I just wrote with a modeling program like EZNEC.
Dave AB7E
On 4/6/2025 6:55 PM, Ron WV4P wrote:
I am very surprised to learn that multi-band antennas do not work well in
stacks.
Ron, WV4P
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