Does anyone have the schematic and alignment/adjustment proceedure for a B&K 675 Tube Tester ? The tester deck looks really simple and designed for "ease of use", but underneath it's a little more detailed with an "83" rectifier like the Hickock testers, a "6AT6", 5 potentiometers, 7 indicator lamps, and two selenium rectifiers. 73s Kees K5BCQ