WBUR Directional?

[Ron Bello]

Would someone (Dan ?) please explain how a directional FM antenna works ?

I understand how one does it with AM - multiple towers, varied power levels 
and/or phases
but in FM isn't there only 1 antenna element in any horizontal plane ?

Thanks in advance


At 07:48 AM 10/27/2005, Dan Strassberg wrote:
>Splice the long URL below back together and paste the result into your
>browser's address field. Then click on "go." This is the official pattern
>from the FCC's public FM database. Radiation plots and coverage maps are NOT
>the same thing. Radio-info.com provides coverage maps--and not very accurate
>ones, at that.
>
>http://www.fcc.gov/fcc-bin/polarplot?temp=64755&rotate=0.00&p0=1.000&p10=1.0
>00&p20=1.000&p30=1.000&p40=1.000&p50=1.000&p60=1.000&p70=1.000&p80=1.000&p90
>=1.000&p100=1.000&p110=1.000&p120=1.000&p130=1.000&p140=0.794&p150=0.631&p16
>0=0.501&p170=0.501&p180=0.631&p190=0.759&p197=0.891&p200=0.891&p210=0.708&p2
>17=0.603&p220=0.603&p230=0.603&p235=0.603&p240=0.676&p246=0.776&p250=0.708&p
>260=0.562&p270=0.447&p280=0.447&p290=0.562&p300=0.708&p310=0.891&p320=1.000&
>p330=0.871&p335=0.871&p340=0.891&p350=1.000&p360=1.000&
>
>--
>Dan Strassberg, dan.strassberg@att.net
>eFax 707-215-6367
>
>----- Original Message -----
>From: "R Trovato" <xtrovato@yahoo.com>
>To: "Dan Strassberg" <Dan.Strassberg@att.net>
>Sent: Thursday, October 27, 2005 2:33 AM
>Subject: WBUR Directional?
>
>
> > Did you say that WBUR is directional?
> >
> > If so must be 'barely' directional....judging from this page:
> >
> > http://radio-locator.com/cgi-bin/pat?call=WBUR&service=FM&status=L&hours=U


Ron Bello
Bello Associates, Inc.
160 Speen Street - Suite 303
Framingham, MA  01701
508-820-1100  Fax 820-1112