I have DIY an Sunaudio 2A3 as my first tube amp project. Of course, the point-to-point construction as inferior to yours. You have used a lot of good components e.g. Tango OPT, Tango choke and power supply filtering cap but they are really need a lot of budget. How is the listening result ?
A year ago when I went to Tokyo, I was also planning to buy a pair of Tango XE-20S OPT. It was so unluckly that the shop was running out of stock :cry:
However, I bought a pair of Hashimoto output transfomer instead. Havn't used them yet.