Chris, is this on a freq of about 4093.95 kHz, with a dit about 225 msec long and about every 2.375 seconds (~25 / sec)?
I saw this either last night or the night before, but it was weak enough I was not sure about it. This morning I have it running about S4 or so.
(edit) Around 1400 UTC I noticed the 4094 ditter was not there any more. It could have faded with conditions, but it had been pretty strong and then no sign of it at all. Sunrise was approaching, although still a way away for me at my location. Possibly the source is further east from me, and shut off or shifted freq on its local sunrise? I checked up around the general daytime freq for the HI beacon, and sure enough, there is a similar ditter on 8009.64 kHz. A bit faster dits, but similar, possibly the same ditter having moved freqs. Could this be related to HI? Or is it another beacon that switches freqs night and day? Unrelated signals? Since I did not hear HI on 4094 while the ditter was active, and I don't hear HI now on 8009, I think it is a pretty fair possibility that HI is now sending dits instead of HI.
T!