Jeff Liebermann wrote:
On Tue, 26 Aug 2008 10:05:19 -0700, Jim-NN7K .
wrote:

Thanks- just was curious- while still working had sites with wedge
shaped antennas- one broke its ray-dome - these (Scala?) were on
960MHz , and the antenna itself appeared to be a Log-Periodic ,
on a double sided Printed Circuit board- Just curious as to the effects
on impedence, and element lengths-spacing , as to how this antenna
was designed. Jim NN7K

Would a photo help? This is the guts of a Sinclair SRL441-2P:
http://11junk.com/jeffl/antennas/Sinclair%20SRL441-2P/index.html

Data sheet at:
http://www.sinclairtechnologies.com/catalog/product.aspx?id=962

Yep, Thats the Beast! These used by railroad, for double track
installations, for boxcar readers (Automatic Equipment Identification)
and mounted at ground level, aimed up about 30 degree angle,to read
ID tags.
Thanks, Jim NN7K