Brian, Here's what your project would look like. First, you'll need crystals. Those can be ordered.
Second you'll need access to a 'test set' of sorts for the micor. There are several types, this'll set you back $20 to $100 (depending what test set you get). This is necessary to 'tune' the RX and TX on the unit to work with your new crystals. Third, You've got filters to tune. The easiest way to do this is with a spectrum analyzer and tracking generator. I just bought one for $1100 - there are other, less accurate ways to do this, but I chose the 'buy the right tool for the job' route. You really want to see whats going on. This same tool will be required (or use other processes) to tune a duplexer so you can use a common antenna for TX and RX. You'll be interfacing an external repeater controller (not difficult, although I'm fighting a COS issue right now on my micor project) to give you a time out timer, CW or voice ID'er, and the DTMF control you'll want (disabling the repeater if it goes berzerk). I'm using the NHRC-2 , under $100 if you do it as a kit. Micors are REALLY easy to work on and a lot of fun - I'm getting close to the end of my project on one here, and I've learned a ton. If you don't have access to the tools, and dont have friends that do, there are folks on the groups (this and others) that might be willing to 'tune stuff' for you, so you can do all but a few parts yourself. Good luck with your project! Josh --- In [email protected], Brian Smith <lirc1...@...> wrote: > > I will apologize in advance, as I am an extreme newby in the world of > repeater building / operation. > � > We've been donated a UHF Motorola Micor system.� The system has > documentation that shows that it once ran at 78W out in commercial service. > � > Being an amateur radio operator without a commercial or well-stocked test > bench, I do not have ready access to a deviation meter or signal generator. > Is it possible to retune these things down to the amateur radio 440 band > without these two pieces of test equipment? > How likely is it that I will run into significant performance issues without > these pieces of equipment? > � > Thanks! > Brian, WW9A >
