well I did the same as you only on a UHF unit had a guy sell it to me as a repeater and it was a base. It took some work but got it to work. One of the things in the UHF unit are all the filters on the receiver interconnect board. The other do you have a station control card? the last think you talked about I also had and just has to trace the circuit as I think there is a spot I had to add a ground. I will try to remember but it was a number of repeaters ago.
John ----- Original Message ----- From: "donlspivey" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, November 14, 2005 9:00 AM Subject: [Repeater-Builder] Micor Base To Repeater Conversion Problems.. > Although I haven't spent a huge amount of time on what should be a > simple conversion, I would like to get the opinion of a Micor guhru or > two. > > I'm converting a Micor base to repeater duty. It was originally a dual > receiver single transmitter intermittant duty machine on 149mhz (yup, > both receivers on 149.xxx). I'll deal with the limited heat sink on > xmit and shielding by greatly reduced power and fans if needed. It > will be carrier squelch for now, it does not have factory PL. I will > probably modify for a external controller but much later. > > The receiver blew my mind. I haven't even tuned it by the book yet and > I can see it is super sensitive. I hope selectivity will be there too. > > My problem is getting it to repeat. I made (I assume) all necessary > jumpter changes on the modules as well as cage and receiver > interconnect boards. I can go into xmit manually proving the ptt line > works. Otherwise, no repeat. I did have one small problem that > actually may have helped see the whole picture. I lost a diode > (shorted CR16) on the squelch gate card that send the machine into > continuous xmit. I killed the pa but left the exciter up to get a > better look at it. While held in xmit, I noticed that I could set the > squelch on the SG board like it should be and although not quite > right, the timeout timer was working. It actually backwards. It times > out with squelch closed but doesn't when open. Probably due to the > state of that ptt line. > > Anyway. Any ideas as to where to concentrate on to get a better idea > why I can't get it to repeat. Remember; I could set the squelch > threshhold on the SG module when that diode held transmit on. > Otherwise it does nothing. I know I'll slap myself when I find it, but > maybe one of you guys have already "been there and done that". Thanks > for your help...Don...N5MZQ > > > > > > > > > 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/
