You can do it but depending on the quality of the Parts you use it will drift. When You have it on the test bench and add caps Etc.. and it reads right on Freq , unless it is going to be within a few deg it will drift and When transmitting things will heat up and it will drift .
I have done it on Scanners. etc But You are talking about a repeater with Someone's call on it and that may be at a remote site around other Commercial Emergency Equipment. I just had My Receive xtal for My 220 Micor repeater done at http://www.icmfg.com/ Temp comp for about $50.00 The old one would drift gradually in a 3 Mo period and I would only notice this on Weak signals, I would adjust it back and it would drift. So I had the one made and I have never had a problem. You said the Club does not have much money, I have a 220 and 440 Repeater on the Air as a Hobby just to keep the old mind active , I do not have a Club or paying Members , Just a Old Disabled Vet on a fixed income, I don't know You a or your Club , But You tell me where and I will Donate $ 20.00 toward a New Xtal I mean all this in a good way you are a fellow ham Good Luck Don KA9QJG On Feb 16, 2010, at 9:57 PM, KE4ZDG wrote: > Hey folks, > > I'm working on a GE Mastr II high band repeater. Someone gave me some crystals that were made up for 146.010 RX. I installed one in an EC ICOM and the best I can adjust for is 146.0064, which sounds really scratchy when I inject a >3k deviation signal on 146.010. When I tune the monitor down to 146.0064, the RX audio cleans right up. > > I've backed out the screw until there's no more threads left in the ICOM. Is there a capacitor I can change or add to give me a little more tuning range to the ICOM? I just need the crystal to go up a hair more (400 Hz on the crystal freq). > > I know I'm promoting cheapness by not buying another crystal, but the club doesn't have much money to spend. > > Thanks, > > Jared
