Here is the web page of Radar engineers, they make rfi locating = eqipment. The Power Co. I work for, just bought the model 250 Utrasonic = dish, and I prefer it over the UE 2000 dish .The cost of the model 250 = I think is around 3000.00 WWW.RADARENGINEER.COM Keith W8CFL --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html ---