A minor, or perhaps major update for this.
Version 2 is in progress. I decided that FETs are monumentally boring so I've found a nice big old Sifam 100uA movement, ordered a pile of stuff from RS including an 12AU7 as the centre-piece of the new version, some high voltage capacitors and a couple of transformers to run back to back for a 115v HT winding. Oh and some chicken head knobs, some sheet aluminium, aluminium primer and black hammer finish paint
First valve project I intend to complete this one, before I try out something a little more complicated with a CRT. Scribblings so far:
I bought 12VA transformers instead for ref.