Uncle Sam Radio 6425 Khz Uncle Sam Radio is on 6425 Khz at 1520 Utc with SINPO 54444. Email-address is unclesamradio(at)hotmail.com. 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