I’m an EE and agree with your theoretical analysis but I tried many different antenna orientations during descent hoping to contact my friend on the DZ. No joy until I was about half a mile from him vertically.

On Wed, Oct 2, 2024 at 8:28 PM Facility 406 <facility_406@bruteforcedevelopment.com> wrote:

> I’m not a BC 611 expert but my observations are that it is range limited
> due to low radiated power. Sure, there will be occasional anomalies
> where somebody works 1000 miles with a BC 611 but it sure wasn’t
> happening to me.

20,000 feet at ground level is almost nothing, and even less in what is
essentially "free space", your observation suggests antenna radiation
patterns, rather than low radiated power.

Kurt

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