Why do you suspect that the CRT has failed? Have yoy actually tested it (e.g is the heater open-circuit?) There is no such thing as a 'vactor CRT'. Any CRT can be used in either mod. Although it's common for raster displayes to use magnetically-deflected CRTs and vector displays to use electrostatically-deflected CRTs, I can think of counterexamples to both of those. Can you give a little more description of the CRT? Any type number on it? Is it more like TV CRT ot a 'socpe one? -tony