I haven’t mentioned the “Mystery Signal” in quite sometime. I heard it back in September of 2015, but only briefly. After reading a report about it on Facebook, I managed to capture it down in the 4.814 khz range. It’s behavior is similar to what I’ve experienced last year, however it does sound different. Distorted perhaps. It still has no regard for any other signal in its path. Here it moves across a STANAG signal on its way up in frequency.