Regulated HT PSU

[pwdrive]

That's ok Robert, as previously said it was bits from my spares box, they are not neccesserily the optimum values, but as a basis for something more refined it's ok, I suppose with a switchable lower voltage reference (zenner) it could be adapted for valve battery receivers.
Excellent articles you are doing...something I would like to do, trouble is my life is always a rush.

Lawrence.