Hi All, Just completed the SSB (and last) board for #2637 and all appears to be operating well. Just one query, the first page of the documentation appears to indicate that it is possible to monitor my own audio by using the carrier balance mode. I can't seem to find it referred to thereafter and, despite trying various combinations, I can't achieve it by trial and error. Help!!! Tnx, Trev G3ZYY -- Trevor Day