Definition of Morse code at the ITU, in Recommendation M.1677. https://www.itu.int/dms_pubrec/itu-r/rec/m/R-REC-M.1677-1-200910-I!!PDF-E.pdf Thanks to Darrel, AA7FV for this. 73 DR -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.qth.net/pipermail/cw/attachments/20221009/06896321/attachment.html>