Converting a monitor from 625 to 405

[ppppenguin]

I wrote up the instructions for conversion to 405. Then converted another monitor by following them. Made a neater job of the darlington dropper for the line output. All works OK but the edge focus seems worse than the first one. As is usual on this sort of CRT the focus control has little effect. This monitor has dynamic focus so I might have a look at that. In any case the picture is more than OK, I'm being fussy because I want top class professional monitor quality.