[murphyv310]

Hi.
Well the 1500 Jellypot works. Spend some time today on this project and have come up with a solution although I may modify it later. The idea of using an intermediate transformer between the jelly pot and the existing transformer was still in my mind after yesterdays failure.
I found another this time with a ferrite core. This proved to be the answer and now I have spot on waveforms at the correct level. The result is not bad, there is a bit of foldover on the left hand side and some cramping on the RHS, also the line is jittery and drifts a lot during warm up which is not valve related. A quick look around shows me some way off resistors and a couple of caps that are notoriously bad in these sets. I'll no doubt change these over the next few days and see if we can get an improvement.
The sync is low too both line and fame sync is rather weak so I'll need to scope the sync seperator and see whats going on there as well.

David the voltage on test point 18 is 220v P-P not 320.