Designing a multiband Yagi takes a LOT of work.
Why not just put up the TH6?
I tried interlacing a 3L15 on the boom of my Telrex 3L20.
Bottom Line: The 20M director knocked the gain of the
15M beam down by about 2 dB, acting as an inefficient
reflector out in front. That's why most tribanders use
trapped DIRECTORS.
You can line up Reflectors with no problem.
Another approach would be to use a trapped DE,
separate reflectors and a 10M director, yielding
a 3L10 and 2L15. That is probably the simplest
approach.
Tom N4KG
On Sat, 27 Oct 2001 "Joe Sloss" <sloss@mindspring.com> writes:
>
> Has anyone successfully home-brewed a dual bander w/ full size R and
> D with
> a trapped DE - total 5 elements. Unable to stack antennas and with
> a HyGain
> 3L 10m, 3L 15m & TH-6 lying around it might be interesting to try.
> Another
> possibility would be to remove the 10-20 Director, 15m DE traps, and
> 15m R
> traps from the TH-6 although there would be quite a bit of
> experimenting to
> get it working correctly on 10/15. Bottom line - I'd like to end up
> with a
> good 2 or 3 element 10/15 yagi on a single boom using what is in the
> backyard,. Thanks, Joe K7MKS
>
>
>
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