Bobby. Fair enough. We all have our desire in amps. Just don't be dismissive of distortion. Everyone was after clean until the 40s or 50s or some shit. I forget the timeline. But then some people discovered distortion through broken speakers and overdriven preamps and some of the most amazing music came from it in the 50s and 60s. It just proves no one amp can do everything.

Why a tube amp then? Try a LM1875 on a board smaller then a saltine cracker. In any case. This amp is designed to be extremely clean compared to most guitar amps. Lots of headroom. But only just enough to where if you stick a pedal in front it starts to grind. Allows the pedal circuitry to shine a little.

Not sure if anyone is interested or not. An updated schematic. I'm still fiddling with the negative feedback.

I decided to unplug the dummy load a try a speaker after soldering more down. Some things I read online about guitar amp clipping suggeste. The clipping I have at full volume might be pleasant. It does sound great. I might leave it as is.

I tried adjusting the 22k and 2.7k resistor on V4 to try and center the clipping better but their was far less of an effect then I expected. I figured a work around, to lower the 100k resistor going into the 6L6 which would increase the amplitude on the output allowing me to lower the preamp gain giving more headroom, but I would prefer to learn how to correct the uneven clipping

I removed 20 feet of jumpers today soldering everything down. It seems to be hard clipping on only half of the wave when I push it to the limit of the output transformer. Does anyone know what might be causing that? It's happening in the last preamp stage. V4. Sounding fantastic though

I might also go with a lower value pot then 500k as well but shouldn't make a difference. I tend to let the tube breath a little, make some heat.

You could power this using two 6v transformers plugged in series. Pull the heater off the 6v after the first transformer and then step the voltage back up with the other transformer with the secondary of the first transformer connected to the secondary of the second transformer and send that through a full bridge rectifier. I might also increase the two coupling caps to maybe .03. Keep in mind, you are going to see some gain. Perhapse too much. That could be reduced by lowering the plate load resistor, the 100k, attenuated with a simple voltage divider or that pot.