Having the same problem with the triode. Pretty much unconditional, no matter what I change. Tried simulating the Matsumin "starvation mode" distortion pedal. https://www.diyaudio.com/community/attachments/valve_caster_10-png.730321/ Figured it might be the 9v supply, bumped it up an varying increments all the way to 200v... convergence fails with any typical components or voltages for a circuit like this.
steve jay
Having the same problem with the triode. Pretty much unconditional, no matter what I change. Tried simulating the Matsumin "starvation mode" distortion pedal. https://www.diyaudio.com/community/attachments/valve_caster_10-png.730321/ Figured it might be the 9v supply, bumped it up an varying increments all the way to 200v... convergence fails with any typical components or voltages for a circuit like this.