Related Clues:

• Ham's medium
• AM/FM device
• Woody Allen's ''--- Days''
• CB, for one
• Call for the Coast Guard
• Receiver
• Firefighter's need
• Contact, in a way
• Send an APB
• They catch waves
• Ham's gear
• It can carry a tune
• Walkie-talkie
• Sound receiver
• Shortwave, e.g.