Another new catch for me, just below the Caribbean pidgin English QSO on 6979 USB, there's a group of Spanish speaking stations chatting away on 6976.6 kHz (yep, another easy-to-remember frequency). SIO 222 at best due to heavy data QRM and local heterodyne QRM due to a strong carrier on 6976.7 kHz (messing with the passband fixes this problem).