Radio Altrex 6390 Khz Radio Altrex is on 6390 Khz at 1450 Utc with SINPO 14321. Better reception at SDR Twente SINPO 24333 at 1501 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