BK Butler Tube Driver Biff Maloy replied at 2:12 PM. since I currently play only at home with a distortion pedal for the high-gain sound (I know. I guess small bear didn't sell dust caps for the pots 3 years ago - you can see the double sided tape keeping the pots from shorting out the board. Im not too bad at reading schematics, and I have a DMM but I cant even FIND two resistors that both read around 150K or 220K. The pots were all scratchy and exact replacements are not obtainable so I managed to fit 16mm long pin Alphas in there. I tacked a 10uF capacitor on the end of R13 as suggested in the analogguru schematic to keep DC of the LO EQ pot. In the Baja design, the filaments are powered via AC connected via a 10 ohm / 1 Watt resistor - switched to that design (maybe unnecessarily), which is why R17 is removed and the 10 ohm resistor spans from one pad of D3 to one pad of R17, there is jumper from the D4 pad to the non CT AC lead to connect that resistor to power. I removed D3 and D4 and connect the AC power to CT and the junction of D5 and D6. My original schematic matches this - but the wall wart CT transformer is hard to find so I converted to non CT wall wart.
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