There has been a lot of discussion on a couple ham radio groups about a carrier that is on 3526 kHz. This is in the 80 meter ham band. I have been hearing the signal here in east central Illinois at night. It appears shortly after sunset here (~0000Z) and fades out here around 0530Z.
It is not actually a constant carrier; twice I have heard it transmit some sort of data mode of a type unknown to me for 45 to 60 seconds, then go back to the carrier. The times of these seem to be random and only once every hour or so at most.
It has been widely reported in Europe and the eastern USA for the last couple weeks. Based on the time of signal loss here, I am hazarding a guess that it is in either the European Russia area or western Asiatic Russia. No one has done any direction finding on the signal yet that I know of. If anyone can DF it or give any signal reports that might pin down its location, it would be appreciated.