I was reading up on the different amplified loop antennas, like the W6LVP or the MLA-30.
Most reviews say "great reception", or show a SDR waterfall with a lot of stations, or show a random station coming in really strong. They also talk about how good they are for "serious SWL". But in most cases they don't show a 2-way QSO with a DX station. And SWL isn't really that relevant since the remote commercial station may be pushing 250KW anyways.
Are those antennas any good for amateur radio DX operation?
I'm in South America. So basically all I do is DX: 8000km is usually the minimum kind of distances I operate to (there are few stations in SA except for Brazil, who are at least 1500km from me anyways).