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 .With our open uhf network we have 5 separate repeaters each on different frequencies and all are linked back to our central site using only 1 link radio per remote site so everything that goes over any one of the sites can be heard by all users over the other 5 sites so our farmers can move freely from one area to another and still maintain communications with their other mobiles.Currently I think we cover close to 2000kms in total area We found setting these sites up that we can install one link radio at the remote sites with the transmitt frequency the same as the central site receive and the link receiver the same frequency as the central site transmitt frequency.Then the link radio acts as a mobile radio with a beam which is aimed towards the central site. With the tone panel on site 2 it will decode the ctcss when a user uses it and then repeat users tone over the site 2 TX frequency and also site1 rx input frequency .The only thing I have to make sure of is when someone uses site 1the site 2 receiver is disconnected and the ctcss/audio in site 2 is received on the link receiver only and then is fed into the tone panel to decode the users tone and then transferred to site 2 transmitter only and not to the link transmitter otherwise the link radio will switch to TX and block the incoming signal from site 1 With our other open network it is really simple when someone users the central site the link receiver on the outer sites transfers the audio direct to the remotes sites transmitter and then switches back to the remote sites receiver. The only difference between the open and our private/shared system is that the private system users a tone control panel to control the repeaters and since the tone control panels only work with valid ctcss tones the whole system should maintain privacy over each site and between the sites (over the link) Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 www.kerinvalecomaudio.com.au -------Original Message------- From: Jim Brown Date: 3/01/2008 4:02:13 PM To: [email protected] Subject: Re: [Repeater-Builder] Linking two shared repeaters Ian, our ham club has talked about putting one of their repeaters on a different frequency and linking them together. We operate both on the same frequency now, one at a time with separate tones.
My proposal to them was to put a receiver at each site for the other repeater and in-band link them. I think that is what you are proposing to do also, except you would use a separate transmitter to do the in-band link. Using a separate transmitter in your case may be more easily accomplished since you can use the same receiver CTCSS tone and transmit audio to both your repeater transmitter and link transmitter. Using a separate receiver as I proposed to our club would be easy for our single CTCSS system with each receiver feeding the controller input through a circuit which gives priority to the local repeater receiver. In your case, you could put your link transmitter on a separate beam pointed at the other site and let the normal tone controller take care of the other repeater. The only thing I would suggest is that you configure your controllers to only transmit the CTCSS while a user is key down, and not during any ID or squelch tail. With a decent link, you would have full interoperability with both systems, and no key up delays due to the other station being on the other repeater. I have not run across a two repeater system linked in this manner, but it does seem to be the easiest way to get the same audio on both repeaters. In your case, that may be a slight detrement since users on the second repeater would be prevented from using the repeater when the first repeater was busy. Using the receiver link I proposed would allow a station to use the second repeater by overriding the audio from the first repeater by simply keying the second repeater input. 73 - Jim W5ZIT --- Kerincom <[EMAIL PROTECTED]> wrote: > Hi guys .I have one shared uhf commercial repeater > using a tp-163 panel and > I am going to install another repeater on different > frequencies 50kms away > and are looking at installing a tp-163 ctcss panel > to it but also looking > for a easy way to link the two repeaters together > allowing clients on one > site to be able to use the same tone on both > repeaters just by changing > channel and still maintain the privacy on both sites > . > One option I came up with was on the 2nd site when > someone uses it the panel > detects their tone and feeds site 2 audio/ctcss to > the site2 transmitter and > also a link radio to send it at the same time to > site 1.When someone uses > site1 ,a ctcss/audio signal is received by the link > receiver which > disconnects the link transmitter and also site2 > receiver and the link rx > ctcss/audio is then fed into the tone panel to > decode and then is fed to > site 2 transmitter . > Link radio transmitter feeds site 1 rx frequency > input > Link radio receiver receives site 1 TX frequency > output. > Does anyone have any further suggestions or know > of web pages detailing > linking two or more shared repeaters > Thank You, > Ian Wells, > Kerinvale Comaudio, > 361 Camboon Road.Biloela.4715 > www.kerinvalecomaudio.com.au > __________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs
