If anyone read my introductory post on this lovely Forum, I was NOT luke-warm, but stated very clearly what I had found in audio. I said the following : I like to design and build my own SET DC two-stage triode amps, because I think amps, and not speakers, are the WORST performers in audio. I feel 99.99 percent of the available audio amps are SORELY lacking, in many many areas. A travesty !! So, since I can't afford the best amp I am aware of, ( especially for ALTECs, the Serious Stereo amp ), I do my own builds. - - - - - - - - - - - - - - - - - - - Of course, as soon as I write " I think that 99.99 percent of the amps are unsatisfactory ", I have just ALIENATED myself to ANYONE who reads my post, and has carefully, thoughtfully paid their money for whatever amp they own. I have been this way for over three decades, about audio amps. It is one thing to criticize, but, HOW ABOUT, for once, finally offering an affordable-to-build POSITIVE solution.? I know, many will not ever get to listen to, and / or be able to afford " the best amp " I know of, for speakers 98 dB and above ( The Serious Stereo amps.) SO, while I can not ethically share what is inside that amp, it is proprietary, I think NOW is a good time for me to STOP complaining about everyone else's sorry tube amp designs, and offer an EASY and inexpensive DIY build, that I designed 9-11-17 I think I will name it simply " Jeff's High Performance SET Amp ". Never before, has a total SET amp design, that I find suitable, ever been made public on the WWW. The amp has only been designed on paper, but I have done such work as this, designing triode amps " from scratch ", since 1982, and Directly Coupled two-stage triode amps, ( my favorite sounding, highest performing topology ), for the last dozen years. I AM NOT LUKE-WARM ON THIS TOPOLOGY, I EAT, BREATHE AND SLEEP IT . No one has yet built this, but it is probable, that a Senior Member of this Forum may do so, and report to us all, about his own build, and give us own listening comparison to his conventionally-designed ( "mis" designed according to me ) 2A3 amps, on his ALTEC 604 speakers. For now, I will just post the schematic, wiring diagram, and my PSUD simulations of the power supply. Comment, : In any two stage direct coupled tube amp, ALL the voltages are interdependent on each other, and it is good when all the voltages balance. After posting this, LOL, I see a 1 VDC error, ( 334.25 vs: 335.25 VDC in PSUD ) and I will re-post corrected PSUD and a corrected schematics, within 24 hours. It won't take much, or change much, to fix this, just a value and parts change for R5. Again, I am open to any and all questions. Perhaps this will develop into an interesting and informative thread. I am confident this design, both performance and reliability wise, will be " da bomb" hence my amp's appropriate name " Jeff's High Performance SET Amp ". Lets have some FUN with this . Dowto1000 CAVEAT : A person MUST have 98 dB or higher speakers, and they must be properly implemented, ( mainly in the amplifier-to-speaker wiring technique ), to even begin to remotely hear what this design can fully do. I am happy to lay-out what sort of amp to speaker wiring I find great, separately from this DIY SET amplifier build thread. I truly hope, some of you readers enjoy this. Thanks.