Recording of audio from GB3MCB this evening 18 Sept 2016 18:45, 100Hz bandwidth CW, G4DDK preamp, Kuhne TR1296H, Elad FDM-DUO with SW2. Beacon was audible up to 20dB over noise for 40 minutes, very deep QSB with a period of around 50 seconds

CWID keying sidebands in SpecLab.  Couple of bit of AS, but this was solid tropo.

Cluster spot:
2016-09-18 17:37 GB3MCB 1296.8597 IO70OJ<TR>IO93NR RST 529  458km