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JosephKK[_2_] · September 13th 08, 03:55 AM posted to rec.radio.amateur.antenna

On Mon, 8 Sep 2008 08:37:27 -0700 (PDT), wrote:

Can a 20 or 40 meter antenna be used to transmit on different bands?
Yes. It depends on how you mean that, though. Either can be 'cut
down' for use on higher frequencies, or 'trapped' and used on lower
ones (so some ridiculous point). If you mean used as a directional
antenna as they work on their design bands, then no, they won't work
that way without that physical modification. There may be some
'directionality' to it, but not like they are supposed to be (that
make sense?). It can work, but not 'well'.
- 'Doc

I guess the old Mosely tribanders were before your time. They worked
well and on 40, 20 and 10 and other antennas on 80, 40, and 20.