May 1982 FM DX Session from Philadelphia 

Yes. These are all FM stations picked up late at night.

@@DrewTechner why do AM stations have to lower there power at night and FM stations don't have to I'm just wondering

@@genegjr At night, the E layer of the ionosphere thickens up and acts like a mirror reflecting AM radio waves hundreds and thousands of miles. FM stations are higher frequency in the VHF band. They are not usually reflected by the ionosphere. On these recordings, I heard these stations far because of tropospheric ducting due to a heat inversion, a weather-related phenomenon. It happens in the summer when there is a high pressure system.

I can't see any of the 3 replies it says are here, and I've tried everything, including going back and forth on the newest button. This is ridiculous, RU-vid!

@@GeraBrown At night, the E layer of the ionosphere thickens up and acts like a mirror reflecting AM radio waves hundreds and thousands of miles. FM stations are higher frequency in the VHF band. They are not usually reflected by the ionosphere. On these recordings, I heard these stations far because of tropospheric ducting due to a heat inversion, a weather-related phenomenon. It happens in the summer when there is a high pressure system.