Good point, reminds me of this January 2009 incident in which WWCR was audible very strongly on a harmonic:
Technical problem puts WWCR on 6430 (http://www.hfunderground.com/board/index.php/topic,837.0.html)
At that time the "phantom" signal was just as strong and clear as on the intended frequency. This current audio on 6940 is barely audible here in my location. I'll try to compare with other flamethrower HF broadcasters to see if it matches any of 'em.
see LEX you are not gettin that old YET you remembered !! ;) this signal has been on 6940 for about a year I can usually hear it every night it's not anything new you just forgot about it ;) I remember sending you a email about it