Welcome to JT65-HF!

JT65-HF is a amateur radio digital mode  written by W6CQZ. It is an extremely efficient weak-signal mode – it is possible to decode signals you simply cannot hear in audio and can even barely see on the waterfall display.

JT65-HF is so labeled because it sends 65 tones spread out over 175Hz. The “JT” part comes from the original creator of this type of mode, Joe Taylor, K1JT, the 1993 winner of the Nobel Prize in physics, and the author of the excellent HSMS and EME software known as WSJT