That is very nice! This should give me some encouragement to re-start an ST35 restoration project which I let slip off my "radar" over the past few years.
I have three ST35 "carcasses" (chassis and metal top cage) with no PC boards, and they have all the original PA774 and Z565 traisformers.
The chromated chassis all have that scuzzy yellow chromate, correction:
cadmium haze, but not too much actual rust.
Two of these have those obnoxious "tar dipped" PA-774s
They tested out OK, but they are definitely not very attractive, no, just plain ugly...
Maybe Dynaco had a problem with "buzzy" power trannies in the early days
I bought six of the fiberglass ST35 replacement boards, scrounged up all the small components, and assembled them, but then I got no fiurther than that...
NOS 7247s and 12DW7s are somewhat expensive, but J/J has an equivalent, the ECC832, so I bought a bunch of them.
These would definitely be good candidates for Dave's EFB modification, and better PSU boards (found three on e-bay) and a C354 choke in place of the 50 ohm 5W resistor. The can cap was just enough to do the job, the PSU boards, (which mount on the empty space on top of the chassis, as well as does the choke) offer a LOT more capacitance for the B+.
I also have a fourth ST35 which I built from a NOS / NIB kit, which I built back in 2003 (and which led me to find this website back then). I almost ended up just listing it on e-bay, could have made some nice $$$
but then, look at all the fun I would have missed over the past eight years
This one had the yellow "scuzz" on the NOS chassis, but it cleaned up very easily, and there was no rust or other corrosion.
I use this working original ST35 as "standard" with which to compare the newer designs (Like Shannon's ST35 boards) , which have better power supplies, and other circuit upgrades modifications.
/ed B in NC