I can recommend you the mu-stage designs of "Triode Dick" (www.triodedick.com)
There is a slight obstacle.... the site is in Dutch. But happily the schematics for power supply & tube amps are straight forward.

All of his designs are mu-stage based: 300B, 211, KT88, 2A3 and even Pre-Amps!!

Talking From my own experience I can tell you, that these amps sounds super.

Links to answer your question:

The Amp:

http://members.home.nl/triode.dick/t...2a3_se_amp.gif

The Power supply:

http://members.home.nl/triode.dick/t...mp_voeding.gif

The current source:

http://members.home.nl/triode.dick/t...en/stro_br.gif



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