On Fri, 03 Oct 2008 10:20:44 -0700, Roy Lewallen
wrote:
I've found this method to be very ineffective in choking common mode
feedline current -- an effective sleeve requires a high impedance for
the outer coax structure, which this doesn't provide. So your dipole
impedance and performance will depend on the length and orientation of
the feedline and the ultimate path to ground for the common mode
current. You'll probably need to trim it when connected to the rig
you'll be using, grounded (or not) as it will be when used.


That's unfortunate, because I am looking for a simple arrangement.

What if I just hang a wire dipole vertically from the mast (= bendy
Black Widow crappie pole) with a PL-259 at the feedpoint? How much
would the coax feedline have to stand off from the dipole to keep from
interfering with its operation? I can't pull it too tightly away or
the pole will bend.

Ken KC2JDY