On Thu, 28 May 2009 11:15:52 -0400, "Bob D."
wrote:

I know the J-pole is a popular 2m antenna, but
why???

Hi Bob,

Mostly because it serves vanity more than needed gain. If a lossy
rubber ducky can hit a repeater with full quietening, a J-pole has no
claim for need.

If I do this, would a clip on ferrite at the feed point make a good
choke-balun?

Go with your instincts there.

73's
Richard Clark, KB7QHC