This is true for a feedline badly mismatched at the antenna. I feed a
multi-wire rhombic with an 800 foot open wire line (600 ohms) and my SWR is
under 1.5 : 1 from over 21 MHz to 3.5 MHz! And the loss is not measurable.
Bert, VE3QAA
Donald Chester wrote:
> >Any thoughts on a 600' or 700' run of open wire feeder.
> >Anything special I need to be aware of?
>
> The tuning adjustment at the matching device will be more cricical, since
> you will be running over a full wavelength of tuned feedline. A given
> change in frequency will move the current /voltage points along the feedline
> a greater percentage of a wavelength than if the feedline were only a
> quarter wavelength or less. You will not be able to QSY as far without
> retuning.
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