Just short out the AFC buss. Simple huh?
If you want to continue to use the AFC, be sure if you have to use high side injection, you need to reverse the discriminator diodes. Be very vareful the diodes are very fragile. Wade Lake wrote: > > The UHF Micor Mobile was a little tricky to tune, especially the > AFC type. I would take care to follow the tuning procedure as > outlined in the manual to the letter. Exactly to the letter. No short cuts ... or you'll be sorry and need to start again. Hope this helps, Neil - WA6KLA > > Also, I am not sure what isolation measures you have already taken > but they would have to be fairly extensive for pairs that close in > frequency to coexist happily at the same site, in order to work > properly. I would suggest all 100% sheided cables - preferably > Heliax, Pass/reject type duplexers on both systems, and at least 1 > extra high quality pass cavity on both transmitters. This is just > for starters. Each site is configured differently so there may be > several other measures to take. Good earth grounds to all > components of the system and extra sheilding for mobile radios used > in a full duplex environment are 2 other necessary things to do. > > It sounds like you have quite the system, and you are probably > aware of the suggestions I am making here but sometimes the obvious > things are the easiest to forget. Sounds like your getting there. > > Best of luck to you and 73, > > Wade - KR7K > > ----- Original Message ----- > From: "Chris Peterson" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, January 07, 2005 4:35 PM > Subject: [Repeater-Builder] in-band linking update > > > > > All, > > > > A couple months ago I posted a question about in-band linking. I thought > > I'd post an update on how it seems to be working. > > > > The repeater is on 442.750+ running about 25 watts. It's a converted > Micor > > mobile. > > > > The remote base listens on 443.025 and transmits about 25 watts on > 448.025. > > The repeater it's talking to is about 90 miles away over a very good path. > > The remote base is an Icom 900 module attached to an FC-900. > > > > The repeater shows no obvious desense, and the signal strength of the link > > is full-quieting. There is one odity, though. The link seems to have > some > > sort of high-pitched, low--amplitude, squeel on it. I assume this is some > > spur from the repeater's transmitter. We plan to try to notch that out > when > > we get a chance. > > > > There is one odity, though. The Micor has been in service for about 2 > years > > now. When we first set it up, the receiver sensativity was about .35 UV. > > Now, we can't get it to come below about .7UV. I should point out that we > > didn't do the full tuning procedure, we just tried to tweak things back > into > > place. Also, the Micor has not been checked since it was put in service 2 > > years ago... That is, it hasn't been checked until it was moved > yesterday. > > > > My question is, is there anything that commonly goes bad in these things > > that might cause this? We have plenty of spare receivers around, so > that's > > not an issue, I was just curious if anyone had any ideas of things to > check. > > > > Also, does anyone have any simplified tuning instructions for the UHF > Micor > > mobile or any tips that might make the procedure go more smoothly? > > > > Thanks, > > Chris, KG0BP > > > > > > > > > > > > > > > > > > > > > > > > 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/
