My favorite 660 DX happened about a year after I got to Puerto Rico in late 1970. I got a surplus R390 made by Hammarlund and built a loop. Frequently I'd try to hear my old stations from Ecuador on frequencies like 570, 590, 840, 1480, 1140, 810, 1170 and others. Then, one evening I was on 660 when apparently the power went out in Cuba and a path to South America was open and I managed to dig out bits and pieces of Radio Carrousel from Guayaquil with cumbias and the same recorded liners I had produced a year or two before.