WSJT-X Release Candidate 2 Available

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  • Updated 2 years ago
I do not recall seeing this announcement on the Flex Community yet. I strongly recommend that FT8 users upgrade to this release candidate as it is much improved over rc1.

Ed, K0KC

 Joe Taylor <>
To: WSJT software development <>
Sent: Saturday, September 2, 2017, 9:21:19 AM EDT
Subject: [wsjt-devel] WSJT-X Version 1.8.0, Release Candidate 2

The WSJT Development Group is pleased to announce a second candidate 

release of WSJT-X Version 1.8.0.  Once again this is a beta release.

Most changes since the "RC1" release candidate are related to the FT8 

mode, and most new features have already been tested in the field by 

several hundred users.

Implementation of FT8 and its auto-sequencing feature is now more 

capable and more polished.  The decoder is faster and better: it now 

includes signal subtraction, multi-pass decoding, and the use of 

accumulated "a priori" information as a QSO progresses.  Sensitivity 

extends downward as far as -24 dB in some circumstances.  Overlapping 

signals 2 and 3 deep are frequently decoded at essentially the same 

frequency.  On a crowded band we sometimes see more than 30 decodes in a 

single 15-second interval, over a 2 kHz window.  The North American VHF 

Contesting Mode has been extended to include both FT8 and MSK144 modes.

The "RC2" release also includes many minor bug fixes and an extensively 

updated WSJT-X User Guide.

We strongly recommend that all WSJT-X users should upgrade to this new 


Go to the WSJT web site here:

and scroll down to the bottom of the page to find a link to the 

installation package for your Windows, Linux, or OS X system.  You can 

also download the packages from our SourceForge site:

Depending on what code revision you upgrade from, it may be necessary to 

do a one-time reset of the default list of suggested operating 

frequencies.  Go to *File->Settings->Frequencies*, right click on the 

table and select *Reset*.

Please report any problems you find with this all-but-final beta release 

to one of these email lists: .  For both lists you will need to be a 

subscriber in order to post there.

    -- 73, Joe, K1JT, for the WSJT Development Group
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Ed, K0KC

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Posted 2 years ago

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I enjoy this new mode FT8 since it was released and the rc-2 decodes much better now.

Have seen signals down to -23 dB here..

And worked Ria today on 17m - hi

Have an 6500 and an attic-dipole 2x9m with autotuner on the underside of the roof (stealth amateur radio) to be unvisible for the neighbours.

So this mode is made for me and am vy thanksful for K1JT ́s work. It is at times of rare sunspot activity a big help !

73 Helmut  dl9eri / oe9eri
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KY6LA - Howard, Elmer

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'Just installed RC2 remotely in California
Seeing many more stations on the air compared to RC1
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Takeshi Yamada

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I find that band window does not respond.  I could change the band from this drop down menu with rc1.
Do I need any setup to enable this?
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Alex - DH2ID, Elmer

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Look at your wsjtx folder in user/xxxx/AppData/Local. There should be a .qrg file there.
If not, you can reinstall the latest wsjtx version and the file should be reinstalled.
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Cal Spreitzer

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Takeshi,,  have you tried  following the instructions in release notes?  This may be what you need to do:
"Depending on what code revision you upgrade from, it may be necessary 
to do a one-time reset of the default list of suggested operating 
frequencies.  Go to *File->Settings->Frequencies*, right click on 
the table and select *Reset*. "

The above worked for me!

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Takeshi Yamada

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Thank you Cal!
It gives me the list correctly. 
I overlooked release notes as it was upgrade from rc1 to rc2.
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Paul Mandel

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Go to Setting -> Frequencies -> put your mouse in the top box, right click and choose Reset