Vin,
For working 75 m within a 500 mile radius, you definitely need a
horizontal antenna to take advantage of NVIS (near vertical incidence
skywave) propagation. A horizontal hamstick dipole will work, but will
have narrow bandwidth and relatively low efficiency, but for what you
want to do it will be better than a vertical for 75 m. If you have more
space, try an inverted L. Cut 67 feet (approx.) of wire. Feed it at
ground level with whatever radials or counterpoise you can muster (I use
only 1 radial wire, but I connected ground to the cold water pipes via
an outside garden hose spigot at the feed point. Run the wire up the
side of the building, spaced out 1-2 feet, then run it horizontally out
to a tree or other support. If you don't have enough linear space, bend
the wire down or sideways at the far end. Height is not critical. Mine
is only 15 feet high (even lower when I use a 67 foot wire for portable
operation.
73,
Bob WB2VUF
Vin Santis wrote:
>
> Good morning,
>
> I'm faced with having to make an antenna change because of severely
> resticted space. I wannt to operate on 75/40 meters in order to continue a
> sked with friends within a 500 mile radius. This will not be my only
> antenna since I also luse a vertical successfully. My thought is to use two
> Ham stSticks for each band as shortened dipoles mounted on the same mast
> and separated 2 to 3 feet from each other. I'll appreciate any comments on
> this arrangement or alternatives to it.
>
> TIA,
>
> Vince Santis, N1VS
> Winsted, CT
> vsantis@earthlink.net
>
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