Since you're top posting...
Try to aim for a couple of feet of separation from the 80 metre antenna at
the ends of the 40 metre elements. If you have to run the elements in
parallel, around 9 inches of separation along the entire length of the 40
metre elements would do. The elements will interact with each other to some
extent, depending on how close the spacing is. You might want to check on
how to construct a trap dipole if you really only want a single wire element
up in the air and no tuners. A Google check will reveal hundreds of sites
with design and construction data.
Mike G0ULI

"Howard Kowall" wrote in message
news:APuri.17090$_d2.4166@pd7urf3no...
so how much distance between the 80 and 40 is 3" enough
thanx
howard

"Ron in Radio Heaven" wrote in message
...
If you cut resonate dipoles for 40 and 80 meters,
attach them to the same center insulator and
feed with coax,all you have to do is either have
the 40 meter wires angled down more under the 80 meter
wires, or pulled off at an angle.
It won't bee very wide banded, but it'll
work without a tuner.
This type works great for AM since most AM activity
is near the same frequency on each band.


73, Ron kc4oy