Made a great DX contact this afternoon to South Africa using the digital mode known as JT-65. JT65 is a digital protocol intended for Amateur Radio communication with extremely weak signals. It was designed to optimize Earth-Moon-Earth (EME) contacts on the VHF bands and conform efficiently to the established standards and procedures for such QSOs. The most popular sub-mode of JT65 is JT65A. JT65 gets ’65’ from the 65 tones it uses.
Working some JT-65 DX
The signals are usually found in the data portion of the Ham Radio Band plans between the CW (Morse) and the PSK/RTTY windows. They are always transmitted in USB mode regardless of band.
The most popular JT65A frequency is in the 20 Meter band.
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