| The N3PX.com web site is the information center for the Southern Patuxent
Radio Club and the Calvert Amateur Radio Club located in southern Maryland. The two sister clubs
sponsor the N3NO 145.350 (-, 156.7) wide area coverage repeater in Prince
Frederick, MD that covers approximately 7,500 square miles in MD,DC and VA and the N3PX 147.195 (+) D-Star repeater in Hollywood, MD.
The clubs also sponsor the Southern Maryland Link System that connects the 145.350 repeater in Prince Frederick to the 146.896 (+,146.2) near Montross, VA with a UHF backbone system.