[murphyv310]

Hi.
I realise this is off topic for the thread so perhaps the mods could split this please to (Pye VT4 Jelly-pot mod) If they think its best.

There are some issues with the modification. The main issue is the flyback time is too long so the picture information appears in the flyback giving foldover on both sides. I think this is due to the 400pf tuning capacitance. On previous mods to 70 degree CRTs using a jellypot I reduce the HT to the line stage and this gives a good compromise between EHT and width without foldover. This issue here is I'm using a 625 line TX on 405 so it needs more tuning but that is counterproductive.
So I have rewired the scan coils from series connections to parallel, this gives more width, removing the tuning brings the width in but still with overscan and high EHT, reducing the HT to the line stage gives correct width without foldover but only 11kv EHT, the idea then is to fit the width control back into the set and increase EHT for 12-14Kv and then adjust the width.

The other issue to show up is those dodgy height and linearity pots, the slider can short to the centre reducing scan which I need to attend to.