Baja Mars Hall 59 Plexi

Bajaman's overdrive circuit based on the Marshall 59 Plexi amplifier.
Original thread and schematic available on the FSB forum here.

Baja 59 Tweed Bassman

Bajaman's overdrive circuit based on the Fender 59 Tweed Bassman amplifier.
Original thread and schematic available on the FSB forum here.

Baja Ampeg SVT Bass Amplifier

Original FSB thread and schematic available here.
I've put the Mid Freq switch components on a separate board to make it easier to box it.

Baja ENG Overdrive

Bajaman's overdrive circuit based on the Engl 530 preamp with switchable tone stack.
Original thread and schematic available on the FSB forum here.
The layout should fit in a 125B box.

09/07/2018 Layout Updated! Inverted Treble and Bass pots' lugs. Changed 390p cap from TL062 pin 5 to 470p. Changed 1K resistor next to 22uF cap to 1K5.
22K resistor between Gain 1 and Gain 3 goes from Gain 1 to 15n/10K 3 rows below instead of Gain 3. 22K above TL062 pin 8 needs to move down one row between 10K/22K and VBias.

Baja MDR Overdrive

Bajaman's overdrive/distortion circuit based on the Mesa Dual Rectifier high gain channel with switchable tone stack.
Original thread and schematic available on the FSB forum here.
The layout should fit in a 1590B box.

Baja Highway 1

Bajaman's overdrive/distortion circuit based on a modified Boss DS-1 with an active high and low tone control section.
Original thread and schematic available on the FSB forum here.
The layout should fit in a 1590B box.

Baja JVM Overdrive

This is based on a Marshall JVM410.
You can find Bajaman's original thread and schematic on the FSB forum here.
There are two versions:
First one with just one toggle switch to select between Cruch, OD1 and OD2.
The second one uses separate footswitches, Gains and Levels.
You need to add an extra pole for LEDs.
Can use any small signal N channel JFet for the buffers (mind the pinout).