I have used BOG's of 500' and they are indeed directional across the band. What differs as you add length is the directionality and in some cases the strength of signals. Between 500' and 1500' ( the longest I've had experience with ) the pattern narrows, which translates into more rejection off the sides.
Unterminated, you'll see some signals off the end where you have the receiver, but they'll be somewhat weaker than those from the far end. Adding a termination at the far end will enhance that effect. With a roughly 1000' BOG on the beach in New Jersey, aimed at 42 degrees ( // the coastline at that point ) the vast majority of the stations heard using that antenna were between 25 and 65 degrees. In this case there's very little reasonably possible at less than 25 degrees, but at 65 - 70 degrees, signals started to drop off. At 500' the beamwidth is about twice that based on a southwest-terminated antenna. Russ Edmunds Blue Bell, PA ( 360' ASL ) [15 mi NNW of Philadelphia] 40:08:45N; 75:16:04W, Grid FN20id <[email protected]> FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15' AM: Modified Sony ICF 2010 barefoot --- On Sun, 10/4/09, Jim Glover <[email protected]> wrote: > From: Jim Glover <[email protected]> > Subject: [am] BOG experiments, week 2: Amazing results! > To: [email protected], [email protected], [email protected], > [email protected], [email protected] > Date: Sunday, October 4, 2009, 4:19 AM > If you've been keeping up with my BOG > exploits, you may want to have a look > at this report about my latest experiments: > > http://www.qsl.net/wb5ude/bog/bog091003.html > > If you haven't been keeping up, or, if you'd like to see > some of my budding > opinions about BOG's, I invite you to read my new general > BOG page: > > http://www.qsl.net/wb5ude/bog/ > > To review my experiments from last week, see: > > http://www.qsl.net/wb5ude/bog/bog090926.html > > Opinions, comments, and discussion will be gratefully > welcomed. > _______________________________________________ > AM mailing list > [email protected] > http://nine.pairlist.net/mailman/listinfo/am > _______________________________________________ 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]
