Follow up to previous post: the sds200 is connected to an external discone. Tried the stock antenna and have zero bars. Also have no signal on the sds100 with a Remtronix antenna from my home (by Uncle Johns Flea Market on 41). Driving distance to the north tower is 19 miles. Line of sight probably 15 miles. Guess I'll keep the analog freq's on the 100 which I can receive.