Tom "Tex" Ritter has a couple large antennas rising up over his house north of Cheyenne, and they pick up signals from all over the world. He's talked to people in 169 countries, as well as someone in Antarctica. Over the airways, he's also known by his callsign WY7KY.
Operators use repeaters, and one repeater system Ritter uses is called SkyHub. There's a repeater up on Sherman Hill, about 40 miles northwest of Cheyenne. It's "backboned" into the internet, which carries the signals it receives out to other repeaters.
There are dozens of these repeaters in Colorado, Wyoming, Utah, Kansas, Washington, Minnesota, New Mexico and even Canada.
Ritter's hobby goes beyond casual conversations with other hobbyists. He's also a volunteer for the Emergency Management Administration.
During a hurricane that hit Puerto Rico, the American Radio Relay League, which is the U.S. flagship amateur radio association based in Connecticut, put a call out for 50 radio operator volunteers to go down to the country and help coordinate relief efforts.