Thanks skip. I was looking at only linking two repeaters together but if I can successfully link two or more with no problems then it would be great to expand our private system to allow my clients even more coverage as long as privacy can be maintained. With our current private repeater we use a tp-163 panel with two maxon pm150 and we hope to use the same or a tp-154 on our second site. With the second site link radio we might try a maxon data radio which we use on our open sites with no problems other wise we will use a maxon pm150 there too and just setup a relay control on site 2 to switch between s2 receiver and the link receiver when s1 is active.With s2 link transmission we should be able to connect it in side by side with s2 transmitter so what goes over s2 TX goes over the link back to s1. I think in the end of your email the two radios back to back .We tried having two radios b2b at a separate site in between the two sites we wanted to link and yes it worked ok but we ran into a) desence if the power output was to high on either radio and we were using 6-10db yagis aimed at each site to give us seperation but we still ran into problems .I think the max power output was around 150mw before problems started . B)bad time delays up to a second or so because each radio had to turn on in time . With our current system we have no delays to complain about .It doesn't matter which site someone talks on, each of the other repeater sites turns on at the same time. I do have one site that carn't communicate very well with the central station and is linked to one of the other sites and yes we do have a 1- 2 second delay on it which we hope to clear that up soon and get it to work direct with the central station. With the link reception from the central station we have found that we require all the remote sites to have their frequencies to be more than 3 meg away as desence can occur on receiving the signal from the central station if it is weak and we have tried a old diplexer inline with yagi and the link radio to notch the remote sites transmitter so the link radio receives the central site with no desence which works Perfectly. Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 www.kerinvalecomaudio.com.au -------Original Message------- From: skipp025 Date: 5/01/2008 5:22:11 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Linking two shared repeaters Regarding what you want to do... there are two basic forms of linking... the type you're trying to do with more than two repeater sites/systems is often called "chain linking" where the center repeater site/station/location passes the communications onward to a third and fourth distant locations. You'll notice my first reply post was specific to mention a two site layout.
Two ways to make up the multi site system you're asking about. The first and best way to go is to find some type of a repeater controller that supports chain linking. The link radios I described in my original example simply connect to the repeater controller and the rest is done with programming. You can also buy the RLS/RBS-1000 board from CAT Auto if it supports chain linking. You'll have to ask them... it's a uP driven board so the firmware can be updated/modified to be a chain or hub operation. How practical that is to get done is another story. One rude and un-practical way to complete a multi-site linking system is to use the two-site system layout I described earlier at each end site of the system. Mid system located Repeaters with more than one path in and out chain function simply have two back- to-back connected radios for each link path. One of the b2b radios is programmed up to a distant repeater link frequency pair and the other onto the main repeater channel. You would need one pair of back-to-back radios for each remote repeater site you wish to include into the system. Yeah all things considered it does work pretty well for what it is. cheers, s. > "Kerincom" <[EMAIL PROTECTED]> wrote: > I will have a look at the circuit and see .The problem we found > with link setup 1 upper design is we could not have one link > radio on one site and one on another site as when the site 2 > link stops transmitting and rx site 1 tail retrips site 2 and > keeps them on .Another problem was while s1 link in > transmitting s2 receiver is trying to pick up the incoming signal and s1 > link transmission at the same time . > With link setup 2 while link 2 is transmitting it carn't receive and when it > switches back to rx and receives a signal from site 1 the only place that > signal goes is to s2 transmitter.Our 5 open repeaters are all linked this > way and the sites only transmit when a user activates one of them .We > experience no delays and the users find it unreal .Each repeater is ctcss > protected including the link using the same ctcss tone .The only difference > between our private and the open system is we use a tone panel to control > the sites.Depending which user activates the system the tone panel will > decode and retransmit it to either the other site or the users mobile. > With link setup 2 I know that the users on one repeater have to wait while > another user is using the system before they can use it but since our users > are more interested in more coverage and privacy this shouldn't be a problem > as our users only use the system for business calls and use the setup a > couple times a day and 90% of the day sits idle > > Thank You, > Ian Wells, > Kerinvale Comaudio, > 361 Camboon Road.Biloela.4715 > www.kerinvalecomaudio.com.au > > -------Original Message------- > > From: Jim Brown > Date: 4/01/2008 2:48:42 AM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Linking two shared repeaters > > Ian, I think you missed my comment on the way the > extra receiver implementation would work. I proposed > using a circuit that gives priority to the regular > repeater receiver for that system. This would lock > out the auxillary receiver during input on one > repeater, and by transmitting CTCSS only while a user > is active, there would never be a case where both > auxillary receivers would be enabled, so that locking > the two together continuously would not happen. I > even have a custom circuit that I have posted to the > group that provides that priority to one receiver. > > I still think it is a viable solution to linking two > repeaters together, but I have not implemented it so > can't be for certain sure. I'll be interested in your > solution if and when you get it implemented. > > 73 - Jim W5ZIT > > --- Kerincom <[EMAIL PROTECTED]> wrote: > > > Thanks Jim .The main idea is that our business > > clients can have some extra > > range and also retain privacy so other users that > > share it carn't hear the > > other businesses on the channel.We only currently > > have 3 businesses that > > share the 1st site each with their own ctcss > > tones.With your second > > paragraph we found that having a separate link radio > > at each end could > > possibly cause continous linking of the sites and > > lock the repeaters > > together in transmission > > __________________________________________________________ > Be a better friend, newshound, and > know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/ > _ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ >
