Don- Now tell everyone about your experiences with the 7.06 Spectrum "ham grade" repeater!!
KS0F ------ Original Message ------ Received: Fri, 13 May 2005 08:37:32 PM CDT From: Don Jennings KI0EO <[EMAIL PROTECTED]> To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Repeater-Builder antennas and other products > My experience, > My first VHF repeater on a really big tower and I installed one of > those "high gain dual band base/repeater antennas." > Well static desense finally set in after a couple months, so I decided > to purchase a commercial grade DB products antenna for my ham repeater. > I think the ham antenna was spec'd at 7 db gain and the commercial > antenna was an honest 3db gain DB 222 I think. > Well, I had to finally take down the ham antenna before the new one > arrived, fiberglass was full of water, and so I mounted a quarter wave > mag mount > on top of the building at the base of the tower while I waited for the > new antenna to arrive in a few weeks. > Well the quarter wave antenna preformed almost as well as the dual band > up 175 ft higher. > When the new antenna arrived WOW, what an increase in performance. > One of the local ham guys (works at a Moto shop) had always preached to > me about commercial grade antennas and was he right. > Never again, I sigh every time I go work on some of the area ham > repeaters from the local ham clubs and see the antenna system. > The argument usually always gets down to, well it has higher gain. A > quick question of how do you check for desense and that > is where I usually stop talking, at that point it is useless. > So ham antennas for repeaters, been there did that, not doing it again. > > Don KI0EO > > > > > > > NĜATH wrote: > > >Anytime I ever questioned this I was always told " The Antenna gain is always set by the advertising department." > >I think that must be fairly close to correct. > >Dave / > > > >----- Original Message ----- > >From: "Russ" <[EMAIL PROTECTED]> > >To: <Repeater-Builder@yahoogroups.com> > >Sent: Friday, May 13, 2005 5:54 PM > >Subject: Re: [Repeater-Builder] Repeater-Builder antennas and other products > > > > > >It is all in the rating. > >The big guys use DBD (the way to go) > >Many Ham grade antennas use DBi > >or the new fake or made up DBC > >Stick with DBD you will never go wrong! > >If you note QST will not print an antenna gain unless > >it is in DBD. > >73 Russ, > > > >----- Original Message ----- > >From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> > >To: <Repeater-Builder@yahoogroups.com> > >Sent: Friday, May 13, 2005 5:44 PM > >Subject: Re: [Repeater-Builder] Repeater-Builder antennas and other products > > > > > > > > > >>One thing I've never been able to explain to people is: Why do the big > >> > >> > >Celwave, Sinclair, etc. "StationMaster" type antennas have only 5.2 dB gain? > >Actually, the 2-meter range ones are listed as typically having only 4.8 dB > >gain, after putting the longer, lower-frequency elements in the 22' long or > >so radome. > > > > > >>The typical 5/8 wave mobile antennas have "3 dB gain", some of the > >> > >> > >"ham-grade" antennas claim 7-8 (and even 10 dB gain). I occasionally get > >asked, why do you use one of those expensive, low-gain Sinclair, Celwave, > >etc. antennas instead of Hustlers, Diamonds, etc that have so much more > >gain? Even the big Scala OG-4 2-Meter antennas are 4 dB gain, if I remember > >correctly. > > > > > >>I've always been at a loss to explain, but having tried some of these > >> > >> > >amateur antennas, I see quite a performance difference (for the better, of > >course) when I go back to using the "real" commercial-grade antennas. > > > > > >>I'm sure there must be something simple that I'm overlooking. > >> > >>LJ > >> > >> > >> > >>-----Original Message----- > >>From: Scott Zimmerman <[EMAIL PROTECTED]> > >>Sent: May 13, 2005 1:45 PM > >>To: Repeater-Builder@yahoogroups.com > >>Subject: Re: [Repeater-Builder] Repeater-Builder antennas and other > >> > >> > >products > > > > > >>Nope, Just me after a long week getting ready for Dayton. Try it again > >>please....... > >> > >>http://www.repeater-builder.com/products/antennas.html > >> > >>Scott > >> > >>Scott Zimmerman > >>Amateur Radio Call N3XCC > >>612 Barnett Rd > >>Boswell, PA 15531 > >> > >>----- Original Message ----- > >>From: "Dave VanHorn" <[EMAIL PROTECTED]> > >>To: <Repeater-Builder@yahoogroups.com>; <Repeater-Builder@yahoogroups.com> > >>Sent: Friday, May 13, 2005 3:24 PM > >>Subject: Re: [Repeater-Builder] Repeater-Builder antennas and other > >> > >> > >products > > > > > >> > >> > >>>At 01:39 PM 5/13/2005, KD5SFA wrote: > >>> > >>> > >>>>http://www.repeater-builder.com/products/antennas.html > >>>> > >>>> > >>>Ah! The SECRET antennas link.! > >>> > >>>Maybe that's why sales are down? :) > >>> > >>> > >>> > >>> > >>> > >>> > >>>Yahoo! Groups Links > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>>-- > >>>No virus found in this incoming message. > >>>Checked by AVG Anti-Virus. > >>>Version: 7.0.308 / Virus Database: 266.11.8 - Release Date: 5/10/2005 > >>> > >>> > >>> > >>> > >> > >> > >> > >> > >>Yahoo! Groups Links > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >>Yahoo! Groups Links > >> > >> > >> > >> > >> > >> > >> > >> > > > > > > > > > > > > > > > > > >Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > >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/
