Since your on the ham bands, there is no requirement as to you being on any frequency as long as it is in within the repeater limits of the ham bands. However, your local coordinating council may require you are within +/- so many cycles. I like to stick to the commercial standards in use in each band. I try to keep my 450's within 500 cycles but usually you can check it with a service monitor every month or so and keep it within + or - 100 to 200 cycles if you are using converted commercial gear in a temperature controlled environment (with temperature compensated Icoms/channels elements.) Remember new "green" crystals will age for the first year or so.
Art - KC7GF
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