The output transformers look great to me, large and heavy, if you like I can post a picture. This very fact is why I want to build this amp, I want to put the ot's to good use. I think the pt may be 250ma, remember this was a replacement and it is larger than the pt in the first chassis that I bought. Right now I am can't decide between a pair of 6v6's or tuned down 6L6's and like you mentioned the ot's will probably match up better with the 6L6's. Sooo many possibilities.
I found a free program that will give an estimate of the current handleing capabilities of a transformer based on the output voltages and the resistance of the windings. I included a link if anyone is interested.
The fact that they felt the need to run 2! 5U4’s , leads me to believe that the PS can supply > 200ma of b+
The only question is how much filament power is available. The filament string shown, will draw a bit less then 3A, but it continues off to power SK2-Sk3. So there is as a guess at least 1A more to be had.
I think it’s doable, with a little caution.
Before you start , try running the stage mono full range to get a feel for the output transformer. Lift the .022 cap from the 15K resistor and feed your signal there…John
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