Chris, Tnx for the background. I'd picked up pieces of it here and there, but you put it together and added pieces I'd not heard to complete the picture. Tnx AMATEUR RADIO: The only fail-safe communications system in the world. ARRL: The reason Amateur Radio is! Jim Weaver, K8JE, Director, Great Lakes Division ARRL 5065 Bethany Rd., Mason, OH 45040-9660, Tel. 513-459-0142, E-mail <mailto:k8je@arrl.org> k8je@arrl.org