WARNING: The following schematics depicts a project that involves working with high voltages. Use of this schematic is permitted with the understanding that if you're not careful, this thing can kill you. Not only are you working with line voltages but the HV (B+) supply has a lot more current capacity than your typical tube project and should be treated with a great deal of respect. Getting hit by ~300V is no fun, assuming you live to tell the tale. That said with proper respect and care there's nothing exceptionally complex about this amp or power supply.
WARNING2: There may still be errors in the schematic (please see note below) and please feel free to tell me if you see any. Pete was kind enough to digitize my hand-drawn version and we've caught one mistake already. So please, just post or shoot me a PM, nobody's perfect and you won't hurt my feelings one bit.
Schematic (updated 5/20)
Amp
Important Correction - in the original schematic C3 is NOT CORRECT! It should be the same cap used at the C4 position (10uF/400V). You will probably have a very bad day if you use a 50V cap at this position. I've updated the image file but the old one may stay in your browser's cache for a while. If you're still seeing a 220uF cap at C3 you're seeing the old file.
PS
I'll be putting together some other thoughts and comments on the build at some point in the near future (hopefully) but there are a couple items of note to start:
Rectifier tubes: this PS can run on any of the following - 5AR4s, 5R4s, or 5U4s. Depending on the tube that you get you may exceed the peak current capacity of the tubes and see some arcing at startup. I haven't had this issue with any of the tubes but for both the 5AR4 and 5R4 we are at or near the peak. The issue with the 5U4 is that they stress the 5V winding of the BFT more than they should be. Pete and I spoke with the trafo manufacturer who essentially said that if we weren't exceeding the total VA for the trafo we should be fine. This was one of the reasons that we selected this transformer, it's absurdly overbuilt and I like that. I've run the amp for more than 5hrs straight with 5U4s in there and the trafo gets barely warm to the touch. My preference right now is to run 5AR4s since they offer a nice slow warm up of the B+ which is easier on the tubes in the amplifier section.
B+: we're running the HV section of the transformer pretty hard as well, but again, the man'f was consulted and the advice was similar to the filament section. Also, B+ will vary depending on the rectifier tube choice that you make, I haven't taken measurements with all 3 but I do know that I get an acceptably high B+ regardless of choice.
General Comment: clearly there are lots of alternate configurations that can be chosen depending on what your end goal is. What is presented here is simply one example of a working configuration that has, to my ears anyway, produced great results.
more later....