@ Maximum Verbosity: There are quite a few Serbian pirates on mw, particularly 1600-1750. They often have QSO's with each other, or with Greek pirates. That sounds like what you heard, perhaps, although there is usually music as well. If it was purely a voice QSO, it may also have been a marine communication (numerous coast gaurd stations use this range in Europe).
Unfortunately, the "Balkan" pirates are pretty much an entirely separate group than the western Europeans I know, so it is very hard to positively ID a station and nearly impossible to obtain a confirmation. Check Harri's blog (above) for more info on this region.
@cmradio: there was a big fat ute on 2024 with data ... not sure of the source, but it killed any hope of hearing radar here.
Cheers, Terry