thanks alot. I’ll check the forum. Ive been reading DH’s book (but not finished) and other references. I think part of my difficulty has been understanding how the signal (AC) and power (DC) are handled in the amp. Also, I dont get recitifer tubes. I still dont have a firm grasp of it, but I havent given up yet!

RE the heater stuff: so the schematic is wrong? in that pin 9 is not connected to 4&5? Not trying to belabor the point, I just want to make sure Im reading the schematic correctly…thx