On 2/16/2020 17:04, Nick England wrote: > Not KY-463/GRA. That’s a typo or bad OCR. The burst keyer is > KY-468/GRA. Whew, that restores my faith in the military nomenclature > system. > Nick - you are correct - bad printing/OCR of change 2 of TM 11-5820-590-12-1 in Google Books. Thanks, Duncan K2OEQ