No preamp (the Icom Pre-Amp doesn't turn on in this frequency range) but connected it up to the usual LW. The tuner doesn't seem to do very much either, but there was a ripple of activity on the spectrum display
Started up WSPR, and left it for half an hour, and here's the result.
Much better than I expected. The received wisdom was that an external preamp is needed. Well, it would undoubtedly make a difference, but I'm hearing these two guys at about -13dB, so it's "comfortable" (for WSPR).
And a nice way to open playtime with 630metres.