1849.79 kHz
bw 7.89 kHz @ -6dB; 8.35 kHz
repeating voice sounds like its saying a number then" echo "then "america contest" or "united america contest " or something
sierra papa six united america (SP6UA..some people just dont use phonetic alphabet correctly.) and he is calling contest.
He is from poland.
prefix is here if you fancy looking at more. http://www.rsgb.org/operating/prefixlist.php