I have a 680 that will not transmit on 10 meters and 12 meters. It is working on all the other bands great. I someone has any ideas what it might be please let me know... Thanks ahead of time, Randy WB4UNA since 1970 Carlus M. Randy Chavis 247 Goff Court West Columbia SC 29172 BANDS : SSB,CW 10-160,6,2,432,220