Tuesday, 6 June 2017

Korg Nutube 6P1 vs 12AU7 tube: Hybrid Amplifier (1)

My next project is an Hybrid guitar amplifier: Triode preamp + Class D 25W amplifier.
The preamp section can be populated with a Korg Nutube 6P1 triode
 or alternatively a 12AU7 tube
The amp is powered by an external AC/DC 24VDC out wall adapter.
It includes headphones, line out and 8 Ω speaker with 25W output.
Everyting is packed on a compact 1590J enclosure:


  1. I'm really interested in your design here especially with a Nutube. Would you be using the pre-made Nutube carrier PCB, or just doing the whole thing with one board, no daughterboard?

  2. I added no daughterboard, I may add a socket though the pins are maybe too wide. The NuTube will sit over two rubber bumpers placed below it, hopefully that is enough, will see.

  3. Really nice design, interested in replicating it ; is there a way to share the original CAD files ??