That is the manner in which our 2 meter dB224 is mounted at present. Roger W5RD
----- Original Message ----- From: "Paul Guello" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, November 28, 2005 10:00 PM Subject: Re: [Repeater-Builder] DB 224 Antenna Orientation on a large (?25 ft.) faced tower > What broadcasters do to get the best pattern on a > large tower is to mount the antenna on the leg coming > straignt off the leg. (perpendicular with the opposite > face) > Paul > > --- Roger White <[EMAIL PROTECTED]> wrote: > >> Ok, many thanks. I do not have the old catalog and >> remember something about >> the orientation of the dipoles toward the tower. >> But, I imagine since this >> tower is so wide, it will affect the pattern no >> matter what, but the site >> has cheap rent :), so beggars can't be choosers! >> >> 73, >> Roger >> ----- Original Message ----- >> From: "Eric Lemmon" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Monday, November 28, 2005 8:31 PM >> Subject: Re: [Repeater-Builder] DB 224 Antenna >> Orientation on a large (?25 >> ft.) faced tower >> >> >> > Roger, >> > >> > My Decibel Products catalog shows that a DB224E-JJ >> antenna can achieve >> > nearly omnidirectional coverage when side-mounted >> on a tower with a DB5001 >> > Side Mount Kit, with all dipoles pointing inward >> toward the tower. This >> > kit positions the antenna mast 18 inches away from >> the tower. Other >> > spacings will probably affect the pattern >> significantly. >> > >> > 73, Eric Lemmon WB6FLY >> > >> > Roger White wrote: >> > >> >> I am going to put up a Andrews dB224JJ (220 MHz >> antenna) on our tower >> >> at TI in Dallas. I have had an antenna on this >> tower up at 250-270 ft. >> >> for many years (a 6dB Stationmaster for 145 MHz >> and a 6dB Stationmaster >> >> for 224 MHz). Our 2 meter antenna is now a dB224, >> with the dipoles >> >> situated around the antenna mast as if for a top >> of the tower mount >> >> with an omni pattern. The 220 antena is an anemic >> 3 dB gain Antenx, >> >> which is not much better than a wet noodle with >> some gain. >> >> >> >> I seem to remember somewhere (maybe an old dB >> Products catalog) where >> >> for an antenna of the dB224, if you face all four >> dipoles toward the >> >> tower, you stand a chance of getting s more omni >> pattern (at least it >> >> is suppose to have somewhat equal gain ripple >> around the tower). The >> >> tower is 25 ft. wide on each face. The antenna >> will be offset from one >> >> leg around 5 to 6 feet at least. >> >> >> >> Does anyone have any experience in mounting this >> type of antenna in >> >> this manner? >> >> >> >> Roger W5RD >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >> >> >> > >> > >> > >> > >> > >> > >> > >> > Yahoo! Groups Links >> > >> > >> > >> > >> > >> > >> > >> > >> >> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> [EMAIL PROTECTED] >> >> >> >> >> > > > > > __________________________________ > Start your day with Yahoo! - Make it your home page! > http://www.yahoo.com/r/hs > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
