Marshall 3005 Preamp

The Marshall 3005 Lead 12 was a mini-stack with a 12 watt solid state head made in England between 1988 and 1991. People claim it's a great amp and can get vintage Marshall sounds from it, and that it takes overdrives really well.

One note in the amp the preamp was powered by +16V/-16V so you'll want to build a bipolar power board.

Marshall Plexi 1987x

Next, t Marshall Plexi 1987x.

With a switch to go between channels

With 2 separate inputs like the amp

With both channels jumpered

Marshall 1992 Super Bass

Next, the Marshall 1992 Super Bass

With a switch to go between channels

With 2 separate inputs like the amp

With both channels jumpered

Marshall JCM800 Super Lead

Next up we have the Marshall JCM800 Super Lead.

With a switch to go between channels

With 2 separate inputs like the amp

With both channels jumpered

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 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).

Handmades Hell's Gain / HG-1

This was a request.
It's a diy Marshall emulator designed on Handmades Brasil forum.
You can find the original schematic here.

CmatMods Butah

Here is a slightly modified version of the Marshall Bluesbreaker that is supposed to sound very nice.

Marshall Shredmaster

As requested. Someone should get a video of Madferret doing his dance...

Marshall Guvnor

Very similar to the Drive Master posted a couple of days ago, but thought I'd include the full layout to keep things complete.  This version with a diode/LED switch as per a request I had.  If you'd prefer yours to be like the original and have fixed LEDs rather than this switch, then just solder in LEDs directly on the board as per the Drive Master layout.  The 10u cap will need to be moved 3 columns to the right.

Marshall Drive Master

From an 80s Marshall ad: Fire your cartage company. You don't need a rack full of gear to get distortion that goes from subtle to stun gun.  If you want all the range of a top studio pro, the Drive Master is for you.

Marshall Bluesbreaker

Marshall Supa Fuzz

Made for Marshall by Sola Sound this is essentially a slightly modified Tone Bender MkII.  Fuzz Central state:

The only differences between the two: the input capacitor is 10µF instead of 5µF, the bypass capacitor on the "attack" pot is 10µF instead of 5µF, Q2's collector resistor is 47K instead of 100K, the resistor from the base of Q1 to ground is 10K instead of 100K, and the transistors are OC75 instead of OC81D. The sound of the pedals should be nearly the same, although the Supa Fuzz will probably be bassier since the input capacitor is quite a bit larger, especially with that 0.01µF from input to ground still in place, which removes even more treble.

Suggested mods

Fuzz Central suggest the following mods and the trimmer would seem like a good idea to me to accurately bias Q3:

470R changed to a 1K for more volume
8.2K changed to a 25K pot for external bias