Helical antennas are wonderful things. However with one caveat, they respond in "normal mode" over a wider bandwidth than the desired axial mode. What this means is that your receiver is more susceptible to overload from _out of band_ signals than it might be using a Yagi having a resonant match. Be sure your preamp is a high end model with coincidentally, " a helical" front end filter.
-- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
