I've tried making coaxial collinears before, both with and without a wooden jig. If your OM's been successful, my hat's off to him. Getting the elements correct is a PAIN.
12 elements should be sensitive; should also be around 8-10 dB gain vice a quarter-wave ground plane! gerry N5JXS On Sat, Sep 22, 2018 at 12:07 AM Liz <[email protected]> wrote: > On Fri, 21 Sep 2018 09:41:26 -0700 (PDT) > "Curt, WE7U" <[email protected]> wrote: > > > The Wiki page about viewing real-time positions of aircraft and ships > > has been revamped. There should be enough detail to easily replicate > > what Ken (n7ipb) and I have been doing for a while, including > > screenshots of the equipment required, snapshots of the Xastir > > displays, and a script to make it easy to start everything up. > > > > http://xastir.org/index.php/HowTo:Display_Aircraft_and_Ships > > > > Enjoy. > > > > Antenna?? > I mention this because my OM has made a series of coaxial collinear > antennae for ADS-B. At least three, inside conduit, have broken apart > =in high winds, so the latest is made up inside a fibreglass surf > fishing rod. This has 12 lengths of coax and is very sensitive. > > Liz > VK2XSE > _______________________________________________ > Xastir mailing list > [email protected] > http://xastir.org/mailman/listinfo/xastir > -- Gerry Creager NSSL/CIMMS 405.325.6371 ++++++++++++++++++++++ “Big whorls have little whorls, That feed on their velocity; And little whorls have lesser whorls, And so on to viscosity.” Lewis Fry Richardson (1881-1953) _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir
