The preference is for ZL6QH to transmit near the top of the band, with 120
second dots, 0.4 Hz shift DFCW, so the frequencies would be 137.7900 and
137.7896 kHz, with stability of better than 0.1 Hz.  Those frequencies are
just a little above those used by VA3LK.
Are there any comments from European potential listeners as to viability of
the nominated frequencies?
73, Bob ZL2CA

Bob,

In Western Eu we have a nasty 'Luxemburg effect' that produces broadcast
intermods at the very top of the band. I think you would be better using
something like 137.600. It depends, of course, on the time of day you will
be operating.

Mike, G3XDV