I have a very good design and explanation for a PS used in a SE 300B built by J.C. Verdier written up in SP # 14. If you won't share yours I will have to study his; so there! Only his is regulated. Pete Millet has a regulated supply he did for a pre-amp that uses two EL 34's as a CCS. That looks interesting. Lots of folks like the tuner tube front ends now; why is that?