Hi Ken,
I got a WPL20 at George's estate sale but it's without the power supply. Maybe we could share some information to help each other. I've traced some of the schematic for the preamps I have and could use some info about the power supply. You can write to me via personal email and maybe we can get our gear working together.
Doc,
Any reason we shouldn't share this info? Even though George is gone, I don't want to do something inappropriate.
All the best,
John