First, thanks to everyone for their patient and extremely useful replies to all my questions. I'm attempting to build a project that combines all the great ideas that I've come across in this forum and from others. If this works out, I'll be happy to share the details.
I thought it's time to post a progress report and ask for some more advice at the same time.
The concept is to combine two monoblocks into one (really heavy!) unit. Here's what it looks like so far:
I was going to use SDS cap boards with GZ34's until I discovered PSD 2 and realized that voltages would be out of whack with the Antek AN-TK400. Sheldon's design uses eight 68uF caps, Triode sent me the kits with eight 100uF caps, and PSD said: "This just ain't right, we can do better"! I was advised to try the 5U4 and, after running a bunch of simulations, I came up with this cap board:
The first C stage (34uF) is not shown but will be located on a turret board underneath the tubes together with some ground tap diodes and snubbers. From the top down, LCLCRC should work out to 480/430/330VDC and a 300V preamp tap (give or take). In series, caps will be rated at 800V. Good so far, but then I discovered that the 5U4 specs said 3A for heaters instead of the 2A I had. Yep, yet another mid-course correction resulted because I didn't RTFM.
I bought two shielded 5V 3A transformers, but the only space available was between the OPT's:
Now I'm starting to wonder if they're too close to the OPT's and/or oriented properly. If it's advisable, I could relocate the soft start relay and realign the filament transformers on a mid-line between the OPT's to provide a little more clearance. Or maybe I'm just obsessing (again) over nothing.
Your thoughts/critique/ comments would be appreciated. I'd like to start wiring things up this weekend, but maybe I need to refabricate some stuff instead?
Thanks,
Chris