Earlier tonight I heard a numbers station on 8175 khz. I listened to it
for around ten minutes, until the transmission ended at 0200 utc. It
was a female voice. I'm not completely sure of the language, but I
halfway suspect it was Czech and that I was hearing the Czech numbers
station S10d.

I made a short recording in the hope that some knowledgeable soul can
help me ID it:

http://renopithicus.tripod.com/8175numbers.wav

I hope this link works, but you might have to copy it and paste it into
your address bar.

Steve