I'm thinking about building a Rev. D as a charity auction item. I have a salvaged PA774 transformer, but don't have any extra Z-565s. I've been looking at the Edcor open-frame transformers as an option, but the GXPP15-8-8K and XPP15-8-8K are only rated for 15W. I could go for the 25W 7.6K XPP25-8-7.6K, but that's not the optimal resistance for the circuit. Also, it's $10 more per transformer (not a big concern, but a factor).
So the big question - do you guys think the 15W Edcors can handle the additional 2.5W of power that the ST35 will put out, or should I just get the 25W Edcors and be 400 ohms lower on the OPTs?
Thanks!
-D