Chuck, Would that be with the dipoles all pointed in the same direction, of set up so they face different directions for Omni reception. I picked up an almost new DB224 but no mast so I am following this thread with interest.
73 JIM KA2AJH From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Sunday, August 09, 2009 7:43 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 2M Vertical Dipoles That will work well to favor one area. Chuck WB2EDV ----- Original Message ----- From: "MCH" <m...@nb.net <mailto:mch%40nb.net> > To: <Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> > Sent: Sunday, August 09, 2009 7:40 PM Subject: Re: [Repeater-Builder] 2M Vertical Dipoles > DOH! Let me rephrase that... > > Lots of comments on the omnidirectional pattern which I suggested might > not work well. > > Any comments on having the elements on one side of the tower right on > the leg? > > Joe M. > > MCH wrote: >> Lots of comments on the unidirectional pattern which I suggested might >> not work well. >> >> Any comments on having the elements on one side of the tower right on >> the leg? >> >> Joe M. >> >> n...@no6b.com <mailto:no6b%40no6b.com> wrote: >>> At 8/9/2009 05:47, you wrote: >>> >>> >>>> As frequency decreases, so does the importance of keeping the dipoles >>>> exactly above one another. This is why you can get away with mounting >>>> the >>>> bays of a LB array around a smaller tower (like Rohn 25) and still have >>>> very good omni-directional performance. Positioning the bays around a >>>> central supporting mast of a UHF array creates considerable pattern >>>> distortion and gain is lost. >>> I once modeled this arrangement in NEC-Win: the resulting pattern looked >>> like a warped pancake. On-horizon gain was all over the place. >>> >>> Bob NO6B >>> >>> >>> >>> ------------------------------------ >>> >>> >>> >>> Yahoo! Groups Links >>> >>> >>> >>> >> >> >> ------------------------------------ >> >> >> >> Yahoo! Groups Links >> >> >> >> > > > ------------------------------------ > > > > Yahoo! Groups Links > > >
