Has anyone used the old motorola HT-220 HT's for a simple cheap APRS radio? I found a box full of them in my garage. I remember doing one years ago, and the only rub was the lack of a PTT relay. I think I might just use some diodes and 1/4 wave line this time? What about XTALS? That can really run up the cost. Bob, Wb4aPR