First real post. This is a tube buffer I built a while back. The guts are from a kit I bought (cheap chinese 6n3 buffer kit). The Enclosure I dreamed up and assemble on my own. This guy adds a subtle "tube" warmth to whatever audio signal you feed through it. The knob on the front adjusts the amount of warmth, although when ever I use this I always end up turning the knob fully clockwise. I mostly made this to learn more about tube circuits. It was an interesting project. I don't really use this thing, but am still glad I made it.
* Changed the stock 7805 for a 7806. This regulator drives the filament. The 6V supply is closer to speck and helps the Buffer run more efficiently.
* Switched the stock 6n3 for a ge 5670. The vintage 5670 sounded a little better then the new chinese 6n3.