NHCraigT
NES Member
One of the Articles from the 1/25/18 ARRL LETTER:
ARRL LINK: ARRL Letter
ARRL LINK: ARRL Letter
.... Numbers station transmissions typically consist of a voice "reading out strings of seemingly random numbers," explained Lewis Bush, author of Shadows of the State, a new history of numbers stations. "These are sometimes accompanied by music, tones or other sound effects," he said. The Radio World article quotes Paul Beaumont, an associate editor of Eye Spy Intelligence Magazine, a publication dedicated to espionage and intelligence, "Voice (numbers) stations are known to be spy messages."...
... ARRL member Chris Hays, AB6QK, on the west coast, said this week that he frequently hears a CW station on 7.163 MHz sending random alphanumeric characters, each group terminated by one or more question marks....