W8EMV - Whiskey Eight Echo Mike Victor

Ball Smacker Radio - pirate radio on 6960

Thanks to an ID by Matt Blaze, I picked up Ball Smacker Radio broadcasting from "somewhere in the Northeast" playing classic rock on 6960 KHz.

Adjacent interference sounded like some kind of radar signal.

"The 20": locating a Seattle FM radio station

The mystery of "The 20", a Seattle FM radio station with a playlist of 20 songs in an endless loop.

Nathan Barnes has the playlist, all tunes from 1958 (Eddie Cochran's Summertime Blues) to 1977 (The Commodores w/Lionel Ritchie, Easy Like Sunday Morning). The approximate transmitter location is not yet determined, but one listener has a Kerberos SDR with 4 channels of RTL-SDR which should readily help direction finding.

The more general problem of locating a rogue transmitter is "fox hunting", and one tool for that is using a directional antenna with a null that helps you zero in on which way the signal is coming from.