Guitar Direct Box
Got a request for an active DI, which coincided with a project I'm working on, so it seemed like a good idea. This one's designed by Samuel Groner and modified by Jack Orman. The schematic came from his blog and can be found here, along with some other info about the circuit.
The Vocal EQ Chart (Vocal Frequency Ranges + EQ Tips)
A vocal EQ cheat sheet to help you mix vocals like a pro | Learn the frequency areas of controlling vocals | Discover common EQ mistakes + Vocal EQ Tips.
Collection of vero (stripboard) & tagboard layouts for 100s of popular guitar effects, with over 500 verified designs. DIY your own boutique effects!
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A large online repository or library of guitar pedal schematics, layouts, PCB transfers, and tagboard layouts. All rights reserved to respective owner(s) - not for profit / for educational purposes ONLY.
Bass Direct Box
Got a request for the DI portion of the Hartke LH1000 bass amp. This is more or less that, but with a simplified power section. In the amp this runs off a bipolar 15 volt supply, but I would think it would also work with regular 9 volt supply. There's not an unbalanced output, but if you need to add that you can probably add it off pin 3 of the XLR. Schematic for reference.
VFE Distortion 3
Always a fan of the MXR Distortion+/DOD 250 as you all have probably figure out by now. Here's VFE's take on the classic circuit. Bunch of extra controls and mods including soft clipping, along with bass and tone controls. Schematic here for reference.
BearFoot FX Baby Pink Booster
Here's a cool little booster from Bjorn. Fairly typical JFET boost but the way the originals are wired, when the effect is bypassed, it's bu...
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…
Here's a simple one-knob drive that's ripe for modification. It uses an interesting combination of one NPN and one PNP silicon transistor stacked together. There are a few different values you can tweak to taste. Here's a schematic for reference: The input capacitor (C1) could be increased for more bass. C2 could be increased to 47-100µF for more drive. The output capacitor (C3) could be decrease for more treble. R5 could be replaced by a 10-20k pot, lug 1 going to ground. C2 could then be…
Boss FA-1 FET Amplifier
Originally a bit of a flop from Boss, the FET Amplifier was made famous by U2's The Edge. It features a 2-band Baxendall tone stack and the Volume control is more like a gain control. Originals use 2 single opamps that are pretty hard to come by these days, so they've been replaced by a dual opamp. Pots are board mounted and it should all fit in a 1590B.
Valve WizardEntropy Chorus
Stumbled across this effect while looking for a completely different schematic. It's a low cost chorus designed by Merlin Blencowe (here's his schematic for reference), using a PT2399. It generates deep modulation and a very thick warble (here's a sound clip).
Escobedo Ugly Face
Today's #fuzzfriday is an Tim Escobedo design: the Ugly Face. Here's what he had to say about it: The Uglyface is a completely all-out fuzz unit for fat, noisy buzzsaw sounds. P1 sets the threshold for triggering the fuzz. This characteristic also means that notes can fade out abruptly when they decay below the set level. P2 is the frequency control. It functions as an unorthodox tone control, at one extreme producing synthesized octave down effects, at the other extreme, thin and nasal…