> Is there any antenna made today you can vary the boom length on ?
> //In a sense, yes, of course there is. Most multielement multiband yagis
> have optimized element spacing for various bands by using more tuned
> elements that happen to be mounted on the same boom; in many cases,
> multiple elements are also driven, and there are commercial (amateur
> product) examples of staggering some elements off the main boom to
> accommodate additional bands with better optimization, as is the case with
> the F12 20/40m beam. -WB2WIK/6
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