We are pleased to announce release candidate WSJT-X 2.4.0-rc3, which includes the new digital mode Q65.

Q65 is designed for two-way QSOs over especially difficult propagation paths such as ionospheric scatter, troposcatter, rain scatter, TEP, EME, and other types fast-fading signals. Details and recommendations concerning the Q65 submodes are provided in the "Quick-Start Guide to Q65", available here:
https://physics.princeton.edu/pulsar/k1jt/Q65_Quick_Start.pdf

The WSJT-X User Guide now includes details about Q65 and is available here:
https://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main-2.4.0-rc3.html

Changes from WSJT-X 2.4.0-rc2 are summarized in the Release Notes:
https://physics.princeton.edu//pulsar/k1jt/Release_Notes.txt

GENERAL ADVICE FOR UPGRADING: If you wish to participate in testing and reporting feedback on Q65, you should upgrade to WSJT-X 2.4.0-rc3. Please remember that by using a release candidate you are joining a beta test group. This brings a responsibility to report your experiences on one of the relevant user forums.

Links to WSJT-X 2.4.0-rc3 installation packages for Windows, Linux, and Macintosh are available here:
http://physics.princeton.edu/pulsar/k1jt/wsjtx.html
Scroll down to find "Candidate release:  WSJT-X 2.4.0-rc3".

You can also download the packages from our SourceForge site:
https://sourceforge.net/projects/wsjt/files/
It may take a short time for the SourceForge site to be updated.

WSJT-X is licensed under the terms of Version 3 of the GNU General Public License (GPL). Development of this software is a cooperative project to which many amateur radio operators have contributed. If you use our code, please have the courtesy to let us know about it. If you find bugs or make improvements to the code, please report them to us in a timely fashion.

Derivative software for anything beyond personal use must not include the new Q65 mode until the General Availability (GA) release of WSJT-X 2.4.0.

We hope you will enjoy using this candidate release of WSJT-X 2.4.0 and exercising the new mode Q65. Please report on your Q65 experiences, successful and otherwise, on one of the WSJT forums. Bugs should be reported by following instructions found here in the User Guide:

https://www.physics.princeton.edu//pulsar/K1JT/wsjtx-doc/wsjtx-main-2.4.0-rc3.html#_bug_reports

  -- 73 from Joe, K1JT; Bill, G4WJS; Steve, K9AN; and Nico, IV3NWV


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