Baja AFD MkII

Gotten a couple requests for this one. Here's Bajaman's second take at his AFD circuit with a better frequency response than the first AFD. More info here on FSB. Should fit nicely in a 1590B.

Baja Reactor

This one was requested ages ago and I got halfway through laying it out, and then promptly forgot about it. It's a power amp/speaker cabinet simulator, emulating a SLO power amp and a couple different speaker cabinets based on the value used for CX (see schematic for values). This layout follows the Rev4 schematic from the thread here on FSB.

Baja Optical Limiter

Here's one of Bajaman's non-amp emulating circuits, the Optical Limiter. It's based on the Demeter Compulator, but is not a compressor but a limiter. What's the difference?

The ratio is the main difference between a compressor and a limiter. A compressor has a low ratio that turns down SOME of the volume when it goes above the threshold. A limiter has a huge ratio that turns down ALL of the volume that goes above the threshold. (from Musician on a Mission)

Here's the schematic for reference. It's designed as a buffered bypass pedal, with the input jack going to the In pad on the board, and a third of a a 3PDT footswitch selecting between the buffered out and effect out. The off board LED pulses with the signal but probably isn't going to be great as an on/off indicator. Just use another third of the 3PDT to make/break the connection between the LED- pad and the cathode of the LED. And then use the final third of the footswitch to wire an on/off indicator LED as you normally would. (At least I think that's what Bajaman had in mind...) Also, the LDR should have 5k light resistance, 500k dark resistance (a GL5516 should work). Oh, and I added an extra pad so GSD pinout JFETs (J201, 2N5457, etc.) can be used in place of the 2SK117.

Bajaman AC30 Normal Channel

Here's Baja's AC30 Normal Channel emulator. Throw a treble booster in front of this and you're pretty darn close to nailing some Brian May tones. Schematic and discussion here on FSB.

Baja AC30TB Emulator

Another one of Bajaman's many amp emulator circuits. It emulates the frequency response of the classic Vox AC30 top boost channel, including power amplifier emulation. It's designed to fit in a 125B with top mounted jacks. Schematic and discussion on FSB here.

The input buffer stage uses a 2SK117 JFET with DGS pinout, but I've throw in an extra pad to use JFETs with GSD pinout (J201, 2N5457, etc). If you're using the 2SK117 you won't need to populate the jumper by Q1, but if you're using a GSD pinout transistor, you will need that jumper.

Baja VH4

Another drive circuit from Bajaman. He's been on a tear lately! In his words...

Here is my latest build based on the frequency response characteristics of the Diezel VH4 tube head channels 3 and 4, but scaled down into a 9v dc pedal friendly format... I got a chance to try using it on Neil Young's "Keep on Rockin' in the Free World" and needless to say it sounded awesome on very low gain setting Channel 3 - just the right amount of searing crunch and in my view one of my best pedals to date!

It will fit in either a 125B with top mounted jacks, or a 1590B with side jacks. If you go 1590B, you'll either have to offboard the pots or use long leg pcb-mount pots and populate them on the component side. I've added extra pads for the JFETs so you can use either DGS or GSD pinout transistors. Schematic can be found here.

Baja SLO

Here's another one from Bajaman. It's a modified version of his AFD, but tuned to sound like a Soldano amp high gain channel. There are enough differences to necessitate a new board. More info here on FSB. Much like the AFD board, this one has the option for buffered bypass or true bypass. And the drilling template fore the AFD will work for the SLO as well.

Baja AFD

Here's a unique overdrive design by Bajaman over on FSB. You can build it with either a buffered bypass or true bypass. If using true bypass, omit the 1k resistor below the lower TL062, and the 1uF cap and 100k resistor connected to the BP Out pad. To wire for buffered bypass, connect the In pad to the input jack, the FX Out pad to lug 1 of the footswitch, lug 2 to the output jack, and the BP Out pad to lug 3. More info and schematic over on the FSB thread. Thanks to 287m for sharing his layout.

Also, the next episode of the DIYLC Tutorial is up on YouTube. Almost have a completed layout!