Saturday 11 August 2012

QRSS60 Fri-Sat Night

I transmitted QRSS60 (60 second dot extremely slow Morse) on 137.17125kHz (yes, that is accurate to better than 0.1Hz) overnight and monitored various 'grabbers' to see my signal. Checking the grabber of YM7MAE proved optimistic. Minute traces of my signal were seen at 4X1RF (3534km) but an extended period of 100% copy was visible at TF3HZ (1858km) for nearly 5 hours from 2245 to 0335UTC with very little fading. The best screen grabs are shown below (click on the pictures to enlarge):

Tiny traces of my signal on 136.17125kHz can be seen on 4X1RF's grabber below DK7FC's big signal. The top trace is DF6NM.


This is the grabber of TF3HZ showing part of the five hours of good propagation. Again, this shows DF6NM at the top, DK7FC in the middle and myself at the bottom of the three. Note that my signal is fading less than the two Germans.

For much more information on 136kHz, QRSS and grabbers, see my LF Links page.