Quote Originally Posted by Kitwn View Post
I'm not sure my current CNC router is precise enough for milling a decent PCB. There's only one way to find out though and it would be a good test of my design and build skills. Off down another rabbit hole!
Kit
One of my biggest problems was getting the machine bed level. It is fairly good now as one side is hoiked up with brass sheet and aluminium foil to shim it level. Before that I used to cut the outline of the board and then put the board in a board-shaped pocket with some thin double sided tape. I still mill out a pocket (in the spoil board of course!) this levels up enough to get a consistent depth of cut.

Never been into radio, and the nearest to valves I have been was when I built a 15W(?) amp from a kit. It had EL84's as output stage an ECC83 phase splitter and I think ECC83's for preamp, but that was nearly 60 years ago and I haven't touched a valve since.

Rob-T