For the past two mornings I've heard JOUB 774 kHz using only a barefoot SRF-T615. It was first heard with a heterodyne of varying levels at 1018-1031 UTC yesterday. Then a man speaking in Japanese fading in and out from 1031 until about 1046 UTC when it finally faded under the sideband of XEACH 770. This morning it was again heard fading in and out of XEACH's sideband from 1053 to 1127 GMT. I was surprise how easy JOUB was to receive such a tiny set at approximately 9700 kilometers (6027 miles).
I also had a trace of a het on 594 kHz, but the QRM from KCSJ 590 was too strong.
I think this proves my theory trans-oceanic reception is possible in the center of North America on a barefoot ULR, at least one as sensitive as the SRF-T615. It was something I was never able to do with an ICF-2010.
It looks like I choose the right time to return to medium wave DXing.