Using ARPS when I helped launch a weather balloon while in college, we were recorded by a station in Las Vegas. We launched south of Phoenix so at least 300 mil

Using ARPS when I helped launch a weather balloon while in college, we were recorded by a station in Las Vegas. We launched south of Phoenix so at least 300 miles. We were transmitting at 3 watt using a small Yaesu hand-held connected to a micro-controller.