I spent some time on this mode before but it was back in 2011. I had assumed that with the introduction of newer digital modes like WSPR and FT8, QRSS had probably died out. I seem to remember listening to a podcast some time back which said as much.
After reading G6NHU's post, I was suprised to find that there is still plenty of QRSS activity and there is also a very active QRSS community on Groups dot io.
G6NHU has a detailed list of QRSS frequencies and they seem to be strategically positioned just below the WSPR frequency on some bands.
The net result of this is that it's possible to use the WSJT-X programme to listen to WSPR signals on say 80m and also look at the QRSS signals on the waterfall display at the same time.
Examples of QRSS signals heard on 80m - 1st Apr 2019
This is the waterfall on the WSJT-X programme rotated 90 degrees. The dashes and dots in morse for G0FTD can be seen.
Some are a bit more elaborate with full call signs shown... see OK1FCX below.
Some have gone a bit further and their signals show up as complex images like fish!
... or maybe it's a dolphin? :o)
And another fish but this one looks a bit like a shark...
Also TF3HZ as shown below. Sometimes it's a case of taking a few screenshots and then trying to put the pieces together.
Some Links...
http://www.g6nhu.co.uk/frequencies.html
https://groups.io/g/qrssknights
https://qsl.net/g0ftd/other/74%20-%20Knights%20QRSS%20Winter%20Compendium%202018.pdf
