I've measured a
couple of them using an MFJ analyzer, and in my measurements I have
*not* noticed the SWR / measured-impedance to change significantly
when I touch or move the antenna feedline (even when it's a relatively
short 6' piece of RJ58). =A0This suggests to me that (in this case at
least) there's not a lot of RF coming back down the outside of the
feedline to the analyzer case, and that the near-50-ohm impedance
Sniped

Funny how much the comments differ from some one who has a
physical OSJ Antenna and those who just try and model it or
or assume they know it won't work well.
73 Al Lowe N0IMW