Hi friends, I am writing to share an idea... WSJT callsign encoding generally accommodates most amateur radio callsigns, but some callsigns -- e.g., some special-event callsigns, and callsigns which might use a *four character suffix* as provided at ITU RR19-7 ยง30 <http://life.itu.int/radioclub/rr/art19.pdf#page=7> -- can't be accommodated by the coding scheme. There has been plenty of previous discussion about that, and I think no more is necessary.
WSPR-X provides for the user's specification of a single callsign; that callsign is used for encoding into messages, and also for use in optional CW Morse identification. I think it would be nice if a user could optionally specify a free-form CW identification callsign which is not subject to the restrictions of the callsign encoding scheme. This would enable stations to comply with regulatory station identification requirements in cases of callsigns which are not accommodated by the callsign coding scheme. David / K7DB
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