Caroline Rainbow 6307 Khz Caroline Rainbow is on 6307 Khz at 1923 Utc with SINPO 24322. Better reception at SDR Twente SINPO 24333 at 1950 Utc: Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Related