tube amp and pre amp schematics

2A3 tube amp schematics

A stunning design of a classic triode amplifier. Direct coupling circuit by Shishido. Uses the triode 2A3 power tube driven by the 12AX7 tube. I use this design in my new single ended 2A3 tube amplifier. The circuit requires careful construction because the direct coupling design allow DC and AC signals pass to the grid of the 2A3 tube.

2a3 shishido schematic

811A schematics

Here are some interesting schematics for the 811A tube.

The Shishido (wavac) 811A tube amp schematic In the photo above, and the "kairo" modified schematic in the photo below:

And this is Ganti's 811A tube amp schematic :