JT65 is a digital mode used in amateur radio for weak signal communication. It allows operators to send and receive messages using a series of tones, making it effective for long-distance communication even under poor conditions. Each transmission lasts about 60 seconds, allowing for reliable exchanges. This mode is particularly popular among ham radio enthusiasts who enjoy making contacts with distant stations. JT65 is part of the WSJT software suite, which was developed by Joe Taylor, a Nobel Prize-winning physicist. The mode is designed to maximize the chances of successful communication in challenging environments.