Hi all - Old thread revival!
Did anyone end up with a final schematic for this? I've a pile of 'fets and a good chance of having enough matched, so I'm wondering If I go for gold and try and make one of these guys. There's enough data about the UGS modules for the frontend, and I've a stash of j103 and k246 I can match for the jfets - not ideal, but I have them, so why not?
I've some of the biggest Conrad sinks floating around, and a few whopping 30V secondary transfo's, and a couple of hefty power supplys, so I think I'm pretty close to being all set for parts...