Can anyone explain to me why qrss is necessary on 136 khz. All the
activity that I have heard on this frequency is workable on normal speed
cw at my qth. I could understand the use of this mode on 20 khz and
below because of a possible bandwith consideration. If this was the
case, there are other alternatives like MSK. Commercial stations only
use the qrss method as a necessity on VLF.
Maybe there is something that I have missed, like very qrp experiments,
but the signals that I have heard do not indicate this. I have not seen
any weak signals on qrss that I could not copy aurally.
Please enlighten me please. de Mal/G3KEV