Hi all,
It’s my first post in this forum. I have a very bad sounding China PP amplifier in my place. and I’d to upgrade it. China amplifier has global negative feedback, a 12ax7(phase splitter), a 12au7(driver), 2 x EL34 (fixed bias) and run in an ultra linear mod. I’d to upgrade it. I’m not electronics pro so if you could help me I appreciate a lot.
My project is:
In original circuit cut as little as possible PCB wires;
Don’t swapped tubes sockets;
Available tubes: 12ax7, 12au7, 12at7, ecc88, e182c, EL34
My system needs less than 20 w (so class AB1 it´s ok)
Triode mode
NO negative global feedback (if it´s possible)
Comments are very welcome.
PS: Sorry my bad English.