> Paul,
> Take a look at the Optibeam 4030 Dipole on their website and
> how it is constructed. The antenna has two loading coils,
> one in each element half which resonates it on 40.
>
> Then there is a tap on each loading coil where a stub is
> added to resonate it also on 30. It is very clever.
>
> It is a bit spendy but Optibeam antennas are very
> well-engineered and built. It gets high reviews for
> excellent performance.
>
> 73, Dennis W0JX
>
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