SCR Phase Controlled PSU for High Current Power Amp

[Charlie Smith]

Three weeks ago, when looking for PSU circuits on the Internet, I stumbled
upon a circuit for a PSU that used a single SCR with phase control to
generate the regulated PSU voltage of about 80 VDC (intended in that case
for an audio power amplifier) straight from the un-filtered, full-wave
rectified mains, resulting in a very efficient unit. After the SCR, a very
large storage cap was used.

I have lost the URL and I cannot find that web site again.

Does anyone know about such a circuit?

Thanks

Andre