hilldweller,
Finally, I have free time to play around. I am thinking to use the prototype PCB for point to point to make easy and look nice which it can hold all the tubes and PS on the board. Do you think it's a good idea? Between 12AX7 and 6SL7, which one would you choose? Beside the part list in the document, do you use higher grade? I am planning KT150 but I would test with KT120 first since I have a set of them. How much do you see the different between KT150 and KT120? What about the coupling caps? I have researched on some Russian K40 PIO, Mundorf Supreme Silver / Oil, Cornell Dubilier 942C, and few other brands but don't know if it make any different. Cost is not important, quality is what i am looking for.
If you have your own part list to share, it would be great.
Universal prototype PCB Board
https://www.ebay.com/itm/1pc-Universal- ... SwhUtbVeIr