Hi all, I'm new to the forum but thanks to the many helpful users on the net (and the long history of the ST70) I have been able to proceed with rebuilding my dad's old ST70 without much help. Having never heard the difference between an original build and a modified build, I'm going to keep the amp audio path as close to original as possible but I am modernizing as I see fit. For the bias section I have two 10 turn pots on hand. My question is whether the original bias pots are "touchy" to adjust. In other words, is it worth while to replace the original pots with 10 turn pots for more accuracy or are the originals good enough?
While I'm on the subject, instead of one pot adjusting two tubes, would it be worth installing 4 pots and 4 bias resistors to be able to adjust each tube individually? Unless there is more to it, it doesn't seem to be a very hard modification. But is it worth it? Thank you all in advance. Rick
PS, I'm doing all of the normal upgrades like a new 80/40/30/20 cap, a new diode, new bias components, new driver board, new RCA jacks. I am going to omit the wiring to the pre amp sockets except for the bias measuring points of course. Oh and omit the stereo/mono switch too.