On Sat, 15 Feb 2014 19:58:10 -0800, Jeff Liebermann
wrote:

http://www.cvarc.org/tech/antenna_myths/antenna_myths.pdf
http://www.w8ji.com/end-fed_vertical_j-pole_and_horizontal_zepp.htm

Not really a criticism, but more of an oddity. Starting on Pg 10, the
author shows that a J-Pole driving the LONG element has 2.37dBi gain,
while the same antenna driving the SHORT element has -3.17dBi gain.

I've never really looked as which way is the correct way to connect
the coax cable. I also don't have any J-Poles around the house.
Skimming the available photos:
https://www.google.com/search?tbm=isch&q=j-pole
I find a mix of methods. Most seem to do it the right way, but there
are plenty doing it wrong.
http://forums.radioreference.com/scanner-receiver-antennas/208290-j-pole-discrepancy.html
http://wmarc.wildmidwest.org/slide_shows/J-Pole_Antenna_Build/images/GEN_3764.jpg

This one is interesting because the two drawings show the correct
wiring, but the photograph shows it built backwards.
http://www.iw5edi.com/technical-articles/144-430-dual-band-jpole-antenna
Sigh.

I hate to admit it, but I think I've built them backwards over the
years. Maybe that's why J-poles have such a lousy reputation and why
I think they suck?

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558