So, ROS 1.0 is the last version.
The ROSMODEM web page also claims a EA8TL to VK2CBL QSO with a -3 dB S/N
(New record in distance: 18660 km), but PSK31 can copy down to -11 dB
S/N and Olivia down to -15dB S/N in a fraction of the bandwidth of ROS.
For the same typing speed as ROS, or PSK31, Contestia 250/4 will work
down to -9 dB S/N, even over the polar paths. In other words, any of
these modes could have been used for the 18600 km path, if propagation
was like it was when the record ROS long distance contact was made.
This means that PSK31, Contestia, or Olivia could also have easily
completed the 18600 km QSO with a 599 report.
Now that it has been found to possibly be dangerous to keep ROS on your
computer, I encourage everyone to try Contestia 250/4 instead. It is
very robust, and uses only 1/10th the bandwidth of that ROS QSO, leaving
much more space for others to make QSO's.
Let's all support Jaak's (ES1HJ) experiment and encourage others to use
Contestia 250/4. If you are in QSO on PSK31, and are using Multipsk,
DM780, or Fldigi, and the other station is also, you can use RSID to
switch the other station to Contestia 250/4 and compare the results. It
will be something you will have fun doing, and something interesting to
discuss afterward. However, it would probably be considerate to PSK31
operators to move together just above the high end of the PSK31 activity.
Please visit http://contestia.blogspot.com/ for more information.
Thanks.
73, Skip KH6TY
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