Here's the latest pre-prototype PCB for the valve Eccamatic eTap2hw units.
The valve preamps and controls all on the one PCB.
It's a double sided PCB made with much trepidation by me at home, every step of the process is a potential disaster but it came out reasonably OK .
The tracks are wider than they would be on a commercially made board , that's so I had a sporting chance of it coming out OK at home.
It's a 9 volt regulator, the valve heaters are in series and run at 12 VAC.