6797 kHz LSB 6.797 MHz LSB, an interesting QSO...when there's no voice, there's a loud rushing sound, not sure if this is a duplex link because its non-stop chatter. Reminds me of a radiotelephone link in a way. There are several similar signals in this region (roughly 6600 kHz to 6800 kHz) in both USB and LSB mode, Portuguese and Spanish.