Daron, One other thing, if they are pine trees you would have a lot of problems at 900 MHz, not much at 150-170 MHz, at least we did not in Houston, Texas around the pine trees at 152 MHz. I am for Simulcast systems for this application if they are engineered and constructed properly.
By the way, OK, I lied, two things. Our only 900 MHz system (40 + transmitters) started out as a Motorola PURC 5000 system, after too many years of problems it was changed out to a Glenayre. There is a long history between the company I worked for and Motorola, mainly because my boss, an ex-Motorola engineer had Bat Wings tattooed to the backside of his eyelids. It took the afore mentioned mess on our 900 MHz system to erase the wings! Don't get me wrong, Motorola made a lot of good equipment. Their pagers were the best in the world and you could get a response from the paging engineering team. On the other hand, when you take a mobile radio and try and modify it to a high stability simulcast transmitter it can't be done. At least Motorola could not. OK, guess it's three. I guess my history with Motorola has clouded my opinion enough I don't have a single Motorola Ham repeater on my tower. I have to admit, the Micor while over-engineered is a pretty good working radio, I just prefer other radios to build my repeaters out of. I have had Micors in the past but sold them last year at Dayton, still have one un-modified hi-band Micor I don't know what I am going to do with. I have five commercial Kenwood's two Johnson's and one GE Mastr II. The Johnson's and GE's are Ham repeaters. Next time I will try and be more forthcoming about my feelings! <OK, smile already!> Paul -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Neil McKie Sent: Tuesday, May 03, 2005 7:48 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] voting receivers with simulcast transmitters Daron, At last report 152.24 MHz is still used by Arch paging but is digital. You might contact Arch and ask if any analog paging is still used in your area. If you have trouble contacting them, please let me know. Neil - WA6KLA JOHN MACKEY wrote: > > Daron- > > Most all your 150 MHz or 900 MHz paging systems are going to be > simulcast. If there are any 150 MHz analog paging systems around, > try listening to them. > > ------ Original Message ------ > Received: Tue, 03 May 2005 01:26:06 AM CDT > From: "Daron Wilson" <[EMAIL PROTECTED]> > To: <Repeater-Builder@yahoogroups.com> > Subject: [Repeater-Builder] voting receivers with simulcast transmitters > > > 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: Repeater-Builder@yahoogroups.com > > [mailto:[EMAIL PROTECTED] On Behalf Of Doug Bade > > Sent: Friday, April 29, 2005 7:56 AM > > To: Repeater-Builder@yahoogroups.com > > 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 <*> 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/
