I would consider one site in favor of a circularly polarized antenna system. Where that site should be placed is another issue. If you are thinking of your employeers located city, I know that one a tiny bit.
Neil - WA6KLA Daron Wilson wrote: > > Hello Folks, > > I'm looking over a radio study done by consultants for our small coastal > community. The recommendation includes three simulcast repeaters with > voting receivers. We live on the coast, the terrain is covered with tall > trees that make wonderful reflectors and contribute tons of multipath when > wet, and it rains plenty. I can't think of any place with terrain issues > where I have seen a simulcast VHF repeater system built out. > > If you have any references (for or against) a simulcast system like this, > please drop me a note. I suspect a fair amount of multipath problems and > not real great audio for the mobile units based on their location, but I > wouldn't be able to prove it until the thing got installed. > > Ideas? > > Thanks, > > [EMAIL PROTECTED] > Daron > > > > -----Original Message----- > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf Of Doug Bade > Sent: Friday, April 29, 2005 7:56 AM > To: [email protected] > Subject: Re: [Repeater-Builder] I'm stunned... > > It uses what looks like a JFET type VCO oscillator running with a > dc controlled/varicap pll on board. I used it to replace a 17.6125 > reference oscillator on a synthesized 900 station. The output is multiplied > in this case and used to sync lock a free running 70.45 RX L.O injection > oscillator and is the clock reference for the TX exciter PLL. I used an > outboard 10 mhz ovenized oscillator to set it up and it was tuned up as a > special from the vendor on our requested freq. > > It is likely not 2ppm itself, but in a stable environment it may > be ok without an ovenized reference. It can use about any reference that is > compatible with the programming. It has no mod port as it is more designed > to replace a crystal than replace the channel element. The RX performance > of the station after the mod was slightly lower with this unit as opposed > to my service monitor generating the 17.6125 in other tests. I guess that > means it does exhibit some sideband noise which influenced operation but > the spec sheet and printouts that come with it indicate pretty decent > specs.. at least for a pll/vco. > > Not an answer for all but a very interesting development for ham > use etc.... maybe an answer for some.. It also only does 1 freq at a time... > > Doug > KD8B > > At 07:14 PM 4/28/2005, you wrote: > >Certainly would be nice to put one through it's paces on a repeater. > >Checking it for temperature stability and purity, etc. Obviously someone > >would need to have some decent test equipment to conduct the testing. > > > >Chuck > >WB2EDV > > > 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/
