MAC shortwave, 6850.8 AM, only occasionally audible between 2350-0035 UTC, with positive ID from Ultraman at 0034z. Linda Ronstadt/Stone Poneys "Different Drum", Janis Joplin/Big Bro. & Holding Co., "Piece of My Heart", "Shaving Cream". SINPO - 23222, steady carrier but tough copy through static crashes and fading, occasional QRM from voice comms below 6850. (N. Central TX - Palstar R30C, 25' outdoor random wire.)