The SWL QSL Museum Bugaria Europe Eurosonor Radio - 2001 - 9980 Khz - Station Overview    QSL Contributed by Hashimoto Kenji (Japan) Eurosonor Radio was a shortwave radio program or relay from Bulgaria that broadcast on the  9980 kHz frequency. Shortwave hobbyists logged and received QSL confirmation cards for this station in the early 2000s.