2015年6月1日 · With JT65, you’re restricted to very small messages, with a limit of 13 characters per message. Here is a typical conversation over JT65: Each message of up to 13 characters is sent over the course of 50 seconds, starting at the top of each minute, so the above conversation would take seven minutes.

JT65-HF is an adaptation of the JT65A protocol with an emphasis upon its usage in the high frequency Amateur bands to facilitate weak signal communications and experimentation. JT65-HF would not be possible without the efforts of Joe Taylor – K1JT and his WSJT

2020年11月27日 · Amateur Radio software for transmission/reception of JT65 protocol on HF bands 2m - 160m Note: The JT65 encoding and decoding routines, also used in WSJT, are developed by K1JT, Joe Taylor. Characteristics: - jt65v2 protocol - Multi decoder - JT65-Log, HRD, DXKeeper, Log4om, MixW2, Logger32, Swisslog, TRX-Manager, WSJT-X, ADIF - …

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 conforms efficiently to the established standards and procedures for such QSOs.

JT4 and JT65 were designed for EME ("moonbounce") on the VHF/UHF/microwave bands. JT9 is optimized for the MF and HF bands. It is about 2 dB more sensitive than JT65 while using less than 10% of the bandwidth.

WSJT-X and MAP65 are open-source programs designed for weak-signal digital communication by amateur radio. Normal usage requires a standard SSB transceiver and a personal computer with soundcard, or the equivalent. SDR-style hardware including the SDR-IQ, Perseus, SoftRock, and FUNcube Dongle is supported by MAP65.

2025年3月9日 · JT65 is an amateur radio QSO communication protocol developed by Joe Taylor, K1JT. JT65 has 3 submodes: JT65A, JT65B, and JT65C. The most popular submode of JT65 is JT65A. JT65 gets '65' from the 65 tones it uses. Each transmission begins at t = 1s after the start of a UTC minute and finishes at t = 47.8 s.

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 asWSJT.

2025年3月7日 · 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 conforms efficiently to the established standards and procedures for such QSOs.

JT65A is a weak signal digital QSO mode. Always use very low power on HF to avoid QRM to other JT65 signals and other modes. 20Watts ERP is maximum for normal activity and DXing in the 40metre to 10metre bands.