More screen anomalies

[jr_tech]

Originally Posted by old_tv_nut

The moire' patterns occur where the focus is a little too sharp and the scan line structure beats with the CRT screen structure. You can show this easily by adjusting the focus in and out or even by adjusting the vertical linearity or height slightly to change the line spacing. Nothing can be done to fix this.

I have never tried this, but I would think that changing the angle between the scan lines and the screen structure would change the moire' pattern... perhaps try rotating the yoke slightly and re-examine the pattern. Is the scan level?

jr