Tuning around via the South West UK based online SDR (Flydog SDR). The 6.6 MHz region is pretty busy.
Portuguese speaking stations very busy on 6.670 MHz USB, among many others. The chatter on 6670 kHz USB reminds me of the "standard peskies" that are heard on 6925 kHz LSB, 6930 kHz LSB, and so on.
SIO 222 to SIO 333.