Richard Ferryman wrote:
I have never seen a design for a trap diople or similar dual band antenna
for 20M and 30M although my modelling shows it should just about work
although the end section after the trap is very short. Commercial antennas
are all either the normal bands or the WARC bands but not both with the
exception of lossy resistively loaded wide band antennas or rhombics. Has
anyone tried this combination?
Dick

Trap antennas where the traps are close in frequency do not work very well.

In the notes for Unadilla traps they say to NOT use the combinations of
10/12, 12/15, 15/17, 17/20.

20M and 30M are far enough apart it should work though it may be a little
touchy to tune up.

My guess is there are not a lot of people that interested in having a 30/20
dual bander.



--
Jim Pennino