It always work out somehow. I already had a full tranformerless tube pre, all I needed to do was slap the FET's in there, but I just ripped it apart and stared from scratch, just to do it. The PSU is going be tricky though since the cascode has such a crappy PSRR, I need to optimise the regulator for lower noise and minimum sonic impact on the pre. Whew.
Analag