Tim, K0FL (and other interested readers); Visit W8KC's detailed site for lineage on Ten-Tec models. http://mywebpages.comcast.net/w8kc/lineage.htm Then, visit www.qsl.net/tentec for more Ten-Tec. Enjoy! Jim Miller, K4SQR http://www.comteksystems.com 4-Square Experts, Stack Yagi & Remote Antenna Switching Systems