Thanks for the information. I think the best thing is just to get it up and
see what happens!

Tam/WB2TT wrote in message
...
Doug,
I put some numbers into EZNEC, and came up with:

20 meter support dipole, 34.1 feet long at 40 feet.

40 meter inverted V hanging from 20 meter dipole, 66.7 feet total length,
with ends drooping down at 30 degrees.

SWR is less than 2:1 from 14.0 - 14.4, and 7.0 - 7.4.

Directivity is about 6db on 40m and 13 db on 20m. I think there would be
some advantage to not having the antennas in the same plane.

Tam/WB2TT

"Doug Birky" wrote in message
...
Thanks for the information. I think the best thing is just to get it up
and
see what happens!

Tam/WB2TT wrote in message
...
Doug,
I put some numbers into EZNEC, and came up with:

20 meter support dipole, 34.1 feet long at 40 feet.

40 meter inverted V hanging from 20 meter dipole, 66.7 feet total
length,
with ends drooping down at 30 degrees.

SWR is less than 2:1 from 14.0 - 14.4, and 7.0 - 7.4.

Directivity is about 6db on 40m and 13 db on 20m. I think there would be
some advantage to not having the antennas in the same plane.

Tam/WB2TT

Doug,
If you go with the 20/40, you have to trim the 40 m first, because it has
more effect on the 20 than the 20 does on the 40.

Tam