14.235 is in the range of SSTV frequencies so maybe that's what you're hearing? Or some obscure digimode? The SSTV folks are very protective of their little kingdom and a few will jam the hell out of anybody who dares to "trespass."
Yea, those SSTV folks are all a bit strange. I had one yell at me during a contest last year because my side bands were interfering with him sending a picture of his unshaven morbidly obese face to some other ham with a similar affliction (please take a joke). I think the whole thing is a bit silly. I don't throw a fit if I have to hear RTTY while working rare dx on CW.