David counts himself among the shortwave dial twisters. While no one knows the exact number of shortwave listeners in the United States, most estimates place the number in the millions.
SWL’s range from teenagers to retired persons to David Letterman (CBS Comedian and star of The Late Show) who has mentioned several occasions how much he enjoys listening to shortwave, particularly broadcasts by the British Broadcasting Corporation (BBC) - On the Late Late ShowNovember 1995 with Tom Snyder, Letterman in an interview expressed his fascination for
his hobby short wave radio listening.
David Letterman and Hal Gurnee, director and supervising producer of the Late Show, share an interest in old-time radio, especially the old programs. Letterman is a frequent shortwave
listener as well.
Both he and Gurnee have LOWE HF-150 receivers. (models made in England) partially scripted from Intro to Shortwave Listening & Wikipedia. ...
http://www.oldqslcards.com/Letterman.pdf