Hello all,

I have been a long time lurker, but I finally (hopefully?) have an
intelligent question to ask.

I am in the process of restoring my father's old 100W pure pentode 8417 PA
that he built as a teenager. After gathering some experience restoring my
old 6V6 PA and building my own line stage, I have a reasonable grasp on
what I am doing.

The first order of business is designing a PSU for the output tubes. After
destroying many HT transformers, my father implemented a direct plug-in
voltage quadrupler for 560V of HT. While I do still have this box of
death, I am quite certain those old electrotytics will explode upon
connection. I am going to build a more conventional design.

I have settled on an LC filtered design for the good regulation, but I am
having trouble finding a transformer with enough capacity. I'm looking at
300mA of current draw per channel. I did find one at Audio Electronic
Supply (P/N PT270), which has a pair of 540V @ 600mA windings. That gives
me about 450V of HT, good for over 70W of ultralinear power (if/when I get
new OPTs). Has anyone had any experience with AES's transformers? I
would like a bit more HT (maybe 500V), but I would settle for this one.

Thanks,
Russ