In message , Cecil Moore
writes
JIMMIE wrote:
Whats the advantage of the Slim Jim over a plan old J antenna.

Apparently, the take-off-angle:

http://www.para.org.ph/membersarticl...Slim%20Jim.htm

I'm sure that W4RNL did a comparison. It might be in here.
http://www.scribd.com/doc/8511817/Some-JPoles-That-I-Have-Known-4
http://www.cebik.com/
If it's not in there somewhere, a Google will be necessary.

Essentially, the answer was 'not a lot', except that the Slim Jim
version (the one with the folded-over top) had a slightly wider
bandwidth / flatter SWR plot.
--
Ian