Sounds like somebody is tuning up their radio. Lots of test tones, whistling into mic, etc. Doesn't seem like there's a QSO going on here at the moment, maybe this guy will QSY to one of the active frequencies shortly...
Frequency: 6889 kHz 6.889 MHz
Mode: USB
Language: Spanish
2140 UTC - I stand corrected...a second station has answered the first stations general calls...now two stations doing radio checks and general ham radio like radio-related banter. Another series of test tones at 2140 UTC