Interestingly, it might be both. According to....
https://shortwaveschedule.com/index.php?station=407
6180KHz = 250KW
11780KHz = 100KW
i dont claim to be an expert, but....
I get a stellar signal from 11780 up here quite often and from time to time, its as solid and good sounding as FM Mono, really.. .. im at the perfect place for a 2nd or 3rd hop and right in the center of the beam.
11780 isabout 355 deg az beam
6180 is a little off from that, about 345 or so, based upon a map i saw somewhere.
I say that to say this.
If 6180 were 250kw, i think it owuld be better for me than it is. I mean its good, but even at times when youd think it should be the better of the two signals, it isnt.
I thin