maxpower wrote:
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

The function of a trap is to automatically shorten an antenna for use on
higher frequencies. For example, 80 meter traps can be added to a 160
meter dipole to make it usable on 80 meters. But it doesn't work in
reverse -- traps won't make your 80 meter dipole work on 160.

You can add loading coils to an 80 meter antenna to make it work after a
fashion on 160. But then it won't work on 80 unless you have some way to
switch the traps out.

Roy Lewallen, W7EL