[rfeenstra]

Question Ron: Late model 70's and Ed's schematic tie the center tap of the 2 filament windings (4 and 7) to ground rather than 7 and 12 being connected together as in the early 70's.  I don't know if there is any noticeable difference in sound between the 2 ways of doing it.  What are your thoughts?  On my mod, I connected 4 and 7 to ground as per Ed's schematic.

I also added the cap on the plate of the 35.  It does make a very small difference (I actually increased it to 500 pf).