I checked out a few Southern KiwiSDRs last night, namely, from Texas, Alabama, Tennessee, and Kentucky. For me, the litmus test is how well they sound on longwave, i.e., if the amount of buzz is impeding non-directional beacons from being heard or not. I figure that if they are relatively clean on longwave, then mediumwave, of course, will be worth trying.

IMHO, only the SDRs from Lubbock, Texas and Fort Rucker, Alabama, passed muster in that regard. By the way, I noticed, while looking at the map on sdr.hu, that Bob Hawkins has turned off the SDR in Edinburgh, Indiana. Hope this isn't permanent, as I always found it to be one of the better-sounding SDRs out there.

73,
Rick Dau (nightly visitor to the KiwiSDR in Overland Park, Kansas - metro Kansas City)
South Omaha, Nebraska EN21af