"test" wrote in message ...
I just installed a new longwire antenna. And because I always heard: "'the
more wire the better"' I have installed a sort of long U, doubling my
regular wire lenght...

One end of the U is attatched to an isolator on the first floor and from
there it goes down to the garden to another isolator, and from there it
goes
back up to another isolator. The coax goes to a balun and to my ar3000a
and
or Kenwood 1000r.

The antenna wires don't touch and they are plastic coated.

did I do the right thing? seems have a lot of interference....

A balun matches a balanced load (a symmetric antenna such as a dipole) to an
unbalanced source (coaxial cable). Does not make any sense to me to feed a
longwire via a balun. Maybe you are using an "unun" acting as impedance
transformer between 2 unbalanced sides?
The increased interference you mention may be caused by overloading your RX,
especially if it has no preselector in its front end.
Just my 2c worth...