Quote:
Originally Posted by Penthode
I have gone thru this as well. Always wondered if it was the geometry of the shadow mask itself? Eg maybe it is slightly warped over time?
|
Shadow mask warping would ruin the purity long before affecting convergence. In fact, convergence is supposed to make the beams coincide at the faceplate, not at the shadow mask.
Long term drift most likely is due to circuit components, not only in the convergence circuits but in the horizontal and vertical size and linearity.
Of course, some sets just never will have all four corners optimum at the same time (and if you're really picky, maybe all sets).