As Gary Debock will attest, 500kw Japanese stations with antenna arrays designed for low angle radiation and strong regional coverage get out big time.
774 Khz Akita often bests 750 Khz KXL Portland which is only 300 miles away - it has everything to do with the salt-water path for sure. The antenna is a pretty simple affair: A west/northwest oriented "Flag" which is no more than a rectangle of wire 27' high and around 43' long. On one vertical leg is a Wellbrook FLG100 pre-amp and impedance match. On the other vertical leg (pointing in the direction that I want to null) is my "professionally" manufactured VACTROL remote termination controller -- circuit boards made by OSHPARK in Portland Oregon and hand assembled in Victoria, B.C. using pretty tough components. The VACTROL does nothing more than present a variable resistance on the null side of the Flag -- of around 1000 ohms. The actual sweet spot varies but the VACTROL can remotely dial in any termination resistance from 300 ohm through infinity. Most of the sweet spots seem to happen between 900 and 1350 ohms. The Flag, KAZ and Pennant antennas are known for their breathtaking rejection of unwanted pests, noise sources and stations competing for your radio dial. At some point soon I will cook up a video series on the joys of using a terminated antenna for truly superior and exciting DXing in a cluttered medium - AM radio. On Mon, Sep 26, 2016 at 11:33 AM, Richard N Allen <[email protected]> wrote: > Colin: > > Thanks for posting the video. It shows what a difference 2500 km makes. > Also, a good aerial. > > Richard. > > -- Colin Newell - Editor and creator *of *Coffeecrew.com <http://www.Coffeecrew.com> and DXer.ca <http://www.DXer.ca> - VA7WWV | Twitter @CoffeeCrew | Victoria - Canada _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
