On Dec 28, 5:32 pm, "William Longyard"
wrote:
I've got a newbie question, and will appreciate any suggestions.

I've got a very small sailboat that I want to put my Icom706MkIIG into.
I've got the Icom AH-4 tuner, too. What I need is a small inverted "V"
dipole antenna that I can hoist up the mast, which would work with both 20
and 40 meters. I'm thinking that the poles would be about about 8 feet each
on a 1/4 wave.

So...
1. What should the poles actually be, lengthwise?
2. Can I get 20 and 40 out of a single antenna (with tuner)?
3. Do I need to create a copper ground plane in the hull if I use a dipole?
4. Will a 1/4 wave antenna let me use the maximum power of the
radio?(100watts).

Thanks,
Bill

Unless less you are on the baby version of the Queen Mary, I
sort of doubt you have room for full sized 1/2 wave dipoles on
that boat. Maybe 20m... I doubt 40. A full size dipole for 40m
is appx 65 feet long total length. Or about 32 ft per leg, or "pole"
if that is what you mean by pole.
Half that size for 20m.
You might be better off with a vertical. IE: feed your mast as
a vertical, or maybe other ideas could be used. Any dipoles used
may have to be loaded to fit on a very small sailboat.
MK