Amp Emulator
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 … Read more
May I?
Got a request for this one. Another AC30/Rangemaster emulator to try and get Brian May’s tone. Here’s the schematic for reference. It calls for “BC245/256” JFETs for Q3-4, but I think that’s a typo and should have the BF prefix. Should work with other JFETs as well. So socket and experiment with the usuals—J201, 2N5457, … Read more
Menatone Ms. Foxy Brown
Another Marshall-in-a-box, the Ms. Foxy Brown uses 3 J201s and feels a lot like an older Run Off Groove design (though it’s not). As per usual, you’ll need to bias the J201s to about 4.5v and then fine tune as needed. Should fit easily in a 1590B. Schematic for reference.
Menatone Pig
Came across this one and it’s an interesting JFET-based OD with active bass and treble controls. It’s apparently based on a late-60s Marshall 200 amp. Drew up the schematic for reference. I believe the originals run off a 9v supply, but newer ones have a voltage doubler internally to run off 18v. Since I know … Read more
GoosoniqueWorx Seventh Heaven
Got a request for this one. It’s apparently a modified Bogner Ecstasy Red, which is a JFET adaption of the Red channel on the Bogner Ecstasy amp. Since it uses 2 footswitches, I went ahead and designed the board for a 1590BB with all 6 pots board mounted. The boost switch uses one side of … Read more
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 … Read more
Catalinbread WIIO
The Catalinbread WIIO is a Hiwatt amp emulator specifically going for the sound of Pete Townsend’s Hiwatts on the Live at Leeds album. (Throwing this and a Univox SuperFuzz in the same box would be a must if you’re a big fan of the Who…) The topology of the circuit (cascaded MOSFETs) is similar to … Read more