The Nervosa has become my current go-to amp for playing at home but I decided to tweak the gain channel a bit. I wanted a little more gain and wanted it to be a little smoother. The gain channel is somewhat modeled after a JCM800 so the obvious place to tweak was the 10k cold clipper stage.
After trying a few things I ended up just changing the 10k cathode resistor to a 4.7k bypassed with a .1 cap. I saw this idea somewhere when researching JCM800 mods. It really did the trick! I also added a little 100pF cap on the first triode to tame the upper highs a little.
Here’s the new schematic:
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