"maxpower" wrote in message
...
Hello All,
I have an 80m dipole that I wish to use on 160m as well. I am
considering using traps on the existing dipole. I have searched the
web and have not found any 80m/160m trap dipoles. Has anyone added
traps to their 80m dipole to make it usable on 160m? Or could anyone
point me in the right direction towards homebrewing traps to suit. I
have made traps in the past for 40m/80m dipoles but I am unsure what
dimensions, length, turns etc I would need for homebrewing a trap to
make my 80m dipole useable on 80m and 160m.
Thank You.
Cheers
Max

'traps' are normally meant to cut up a big antenna into smaller pieces for
user on higher frequency bands. that is, if you had a 160m dipole you could
put 80m traps in it to make the inner part resonant on 80m. to get an 80m
dipole to resonate on 160m you need to add loading coils to make it look
longer, that will of course make it not resonant on 80m. with some more
complex loading and trapping combined you could probably make something that
would force it to resonate on 160m and 80m... but its probably easier to
just put a tuner at the radio end and got with that.