Many thanks to SRAA contributor, Andy Robins, who shares the following recording and notes:

U.S. pirate radio station KVHF recorded on 6.420 MHz (42-meter band) beginning at 0615 UTC on 9 November 1980 in Kalamazoo, Michigan. Only a few minutes of the recording could be recovered because of the poor physical condition of the original cassette tape. This station was later "busted" by the Federal Communication Commission, at which time its location was revealed to have been in California. This made KVHF one of only a relative handful of "free radio" stations that have operated on shortwave from the U.S. West Coast.

Receiver and antenna: Collins R390A and random end-fed wire antenna