On Wed, 06 Aug 2003 12:52:06 -0400, Steve Robertson wrote:

If you're hell-bent on building your own, then I would suggest a CLC
design to get a higher HT. I don't think regulation is going to be that
big a deal unless you are driving the thing way past class A. And that,
my friend, is going to be so loud that you will likely not hear the
distortion nuances introduced by a bit of power supply sag.

I have been considering the Pi filter as well. The only problem is that
with this transformer, I am looking at 700VDC which is a bit much. They
do have a 510V @ 400mA that I could buy two of, which would give me more
like 660V, which is the max for the 8417s. The only thing that bothers me
about the Pi filter is the EMF generated by leakage flux due to the
current spikes required to drive the first cap. Perhaps I am just being
paranoid. Is this really an issue with properly bypassed hexfreds? Should I go
with a tube rectifier? Any thoughts?

Thanks for the advice,
Russ