Hmm... I don't know Andy, my local environment is very quiet at the moment but
it could also be a trick of the ionosphere... My aerial tonight is far from
optimal on 600m. It is a horizontal dipole for 80m (actually an FD-4 windom with
the original balun) about 10m above GND. I just checked the noise floor and it
is -128dBm with the antenna connected and -131dBm with a 50 ohm dummy load, both
in a 230Hz BW, so your signal is very close to the RX noise floor here... The
S/N of your signal would surely be a few dB better if I had a decent aerial.

Thanks for the signal.

73
Johan SM6LKM

----

Andy Talbot skrev:
> That's very interesting -  I appear to be 10 - 15dB better S/N with
> you Johan (-5db S/N) at 1200km, than with GM4ISM (-20dB S/N) at 577km.
> 
> Background noise levels ?
> Sea path ?
> 
> Andy  G4JNT
> www.g4jnt.com