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2018 News Releases




WSJT-X 2.0 full release now available

Date : 19 / 12 / 2018
Author : K1JT & WIA

WSJT-X is the very popular extreme weak-signal digital amateur radio mode. WSJT-X implements communication protocols or "modes" called FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR, as well as one called Echo for detecting and measuring your own radio signals reflected from the Moon.

JT4, JT9, JT65, and QRA64 use nearly identical message structure and source encoding. They use timed 60-second Transmit/Receive (T/R) sequences synchronized with UTC.

JT65 and QRA64 were designed for Earth/Moon/Earth (EME or "moonbounce") on the VHF/UHF bands;

JT65 has also proved popular and effective for worldwide QRP communication at HF.

JT9 is optimized for the LF, MF, and HF bands. It is about 2 dB more sensitive than JT65 while using less than 10% of the bandwidth. With either JT9 or JT65, world-wide QSOs are possible with power levels of a few watts and compromise antennas

JT4 and QRA64 are optimized for EME on the VHF and higher bands, and especially the microwave bands from 2.3 to 24 GHz.

FT8 is operationally similar but uses T/R cycles only 15 seconds long. MSK144 is designed for Meteor Scatter on the VHF bands. These modes offer enhanced message formats with support for nonstandard callsigns and some popular contests.

Version WSJT-X 2.0.0 - has just been released as as General Availability (GA) version.

The FT8 and MSK144 protocols have been enhanced in a way that is not backward compatible with older program versions.

The new protocols become the world-wide standards starting on December 10, 2018, and all users should upgrade to WSJT-X 2.0 by January 1, 2019. After that date, only the new FT8 and MSK144 should be used on the air.

All users of WSJT-x are encouraged to upgrade prior to 1 January 2019 to ensure compatibility.

For more information and downloads take a look at: Link

Page Last Updated: Wednesday 19 December 2018 at 10:12 hours by Justin Giles-clark


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