I recently purchased this EL84 monster and wanted a local tech to make the Tape Out RCA Output on the rear into Volume controlled Pre Outs in order to easily run the woofers in my speakers that I currently run active. The tech I am in contact with would like a schematic...I kind of think ones not needed but not being an expert I figured I'd better try to find one to keep him happy. Any help would be greatly appreciated as I know Bill Beard didn't make these public and his authorized repair people don't seem to have any active accounts anymore that I can find.