Crate Vintage Club 50

Dirty footswitch jack was making intermittent contact, briefly powering the channel switching vactrols on and off which made the amp sound as if it was fading in and out.  

I also modified the tone stack for a more "British" flavor, and added a 3-way bright switch and midrange control.  I rebiased the phase inverter for less gain but reduced the pre-PI attenuation in the clean channel.  Now both the output stage and PI start clipping with roughly the same input volume, creating a more dynamic and musical distortion in the clean channel.

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