CKXU Gets Approved for an FM Signal Increase! Aaron Trozzo here, CKXU’s Station Manager / Executive Director. Here’s a PSA! (That’s a fancy media people acronym for a “Public Service Announcement”.) We here at CKXU HQs have been getting some questions about the status of our signal increase project! First off, we’d like to sincerely thank all of the volunteers, members, and other general supporters who donated their time and hard-earned dollars to this organization over the years.