[Hallicrafters] 5-letter signals

[Thomas C. Dailey - Dailey Services, LLC]

BS!  The only signals used by radio TELEGRAPH ops were "Q" and "Z" signals. 
ZUE means affirmative, ZUG means negative, and so forth.

"Routing Indicators" were used for teletype (on and off line), and WERE 
5-letters, but based on the central distribution station they came from -

i.e RUWD during the mid-60's was Naval Relay Station, San Diego.

RUWDE was Fleet Anti-Submarine Warfare Center, SDIEGO (us) - RUWDG, RUWDAF, 
RUWDB, RUWDC, etc.  went to other commands.

Perhaps this is what he is thinking, but to my knowledge there were NEVER 
5-letter signals among civilian or military ops.

TCD