"Matthew&Wendy" wrote in message ...
OK, Sorry if I was unspecific. The antenna is about thirty feet long,
with
one leg at twenty feet. The entire antenna is twenty feet off the ground.
The Five hundered mile range is great, but it was an AM station out of
North
Carolina. The BBC broadcast on 5975 came in great too. But about 100
kilohertz on either side, and I can only pick up locals, within 200 miles.
I
saw a vertical antenna that with a switch, the operator could change
something and make the antenna resonant on different frequencies. Is this
possible with a wire antenna?




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This is a farily complex subject.
For starters, go to your public library, if you are lucky they will
have a copy of the ARRL Ham Radio Handbook, if not then they should
have some refference book for ham radio. Look up antennas.
To make a vertical antenne resonate on differing frequencies requires
added indcuctance (a ctapped coil) or capacitors. To cover from say 2
through 10Mhz
is a pretty complex task.
Good luck.
Terry