> However attempting to use "CQ 3C AF8C EN81" created a couple of problems.
Hi Glenn, You are simply trying something that is not supported in WSJT-X. The only supported additions to the CQ message are: CQ 000 - CQ 999 3 to 1002 CQ A - CQ Z 1004 to 1029 CQ AA - CQ ZZ 1031 to 1731 CQ AAA - CQ ZZZ 1760 to 20685 CQ AAAA - CQ ZZZZ 21443 to 532443 The number ranges after possible number or letter combinations are the actual values used in the message encoding process. In short either exactly 3 number characters or from 1 to 4 letters are only supported in the encoding. For further information you may study in document https://wsjt.sourceforge.io/FT4_FT8_QEX.pdf It is a bit heavy, I promise. 73, Reino OH3mA _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel