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I built one of these a few years back and my only complaint is the hiss. I replaced the aluminum caps with tantalum and it helped, swapped out a couple of opamps, but none of it made much difference. With the GAIN & Tone turned up there was too much hiss. Other than that, it is a sweet...

This was inspired by Music6000. He sent me pix of a pedal he bought called the Canaglia and a link to a schematic on FSB. A simple circuit, 3 knobs, basically an Electra driving a SHO. I made a couple of improvements to how the GAIN & DRIVE pots are connected and here it is. This is a...

In this part, we'll discuss what happens when we put a resistor in parallel with a pot. We'll address the simple case where we use the pot as a variable resistor (as opposed to a variable divider) where we connect two pins together. The first example is a B-taper pot. We'll connect pins 1 & 2...

So how do know which taper to use? It really comes down to how the circuit responds when we turn the knob. For the most part, A-taper is good for GAIN and VOLUME knobs where we want to be able to easily access settings over the full range of rotation. Examples: The maximum output from a TS is...

There are a lot of misconceptions floating around regarding pot tapers and parallel resistors, so I thought I'd make an attempt to clarify things. I'll explain how to read the pot taper charts in the Alpha datasheet, how the circuits react to pot taper and resistance, how to select a pot taper...

HamishR emailed me a few days ago with a mod to the Eliminator (PPCB Recycler) OD. The Eliminator bears a strong resemblance to the M.I. Audio Crunch Box, with the LED clippers deleted. Missing Link added a Vref buffer & output buffer, both of which I consider unnecessary. HamishR added the...

This one has been in the queue for a loooooooooong time. I built it pretty much per the schematic I got from Robert. I subbed an MCP6002 for the MCP602, a CA3240 for the LM258, 1SS98 for the BAT48's and a 2N5246 for the 2K208-Y. The Shallow Water manual was helpful in setting the LPG trimmer...

I just can't get enough of Bjorn Juhl's pedals. There are two versions of the Blueberry pedal. V1.0 has the input feeding into U1. V1.5 has a JFET booster in front of U1. I breadboarded V1.5 with a few minor mods. I rewired the NATURE control as a BASS control and added a TREBLE control. I...

This is something that HamishR & II have been messing with for a few days. It's kind of an an outgrowth of the ChuckMeister. It started with HamishR taking the 1st half of the ChuckMeister (he call his version the Shredmaster) and stacking it with a circuit we call The Beast. Then we started...

This EQ pedal kicks ass. My breadboard is built pretty much per the build docs, but I subbed a few parts when I didn't have a few oddball values. A word of warning, this circuit does not take kindly to mods. Don't ask me how I know that. If I had to guess, this design is based on an earlier...

HamishR asked me if I had tried the Basic Audio Alter Destiny. I hadn't. Just another BMP, right? Maybe not. I liked the bright cap on the FUZZ pot and the FAT knob (I can hear you snickering). The gain is somewhat reduced in the distortion stages and there is the familiar variable MID knob...

Ok, I'll admit that it needs a better name. HamishR & I were playing around with the Marshall ShredMaster, trying to make it into something a little different. You'd think that a pedal with "shred" it its name would be a high-gain pedal. Not the case with the ShredMaster. For us, the best...

This is a minimalist version of the Clapton Mid Boost. Instead of discrete transistors, I used an opamp. There is only one knob: MID BOOST. The freq response is similar to the Clapton Mid Boost, with a broad focus on the mids. With the component values shown, the midrange is a little more...

The pedal circuit bears a strong resemblance to the Friedman BE-OD line of pedals. I gotta say I like the tone of this one better. Very nice overtones. Good gain range. I was unsure about the EQ section for two reasons: 1. The TREBLE control is tuned very high up in the freq spectrum...

This one has been getting good reviews and demos; here's the breadboard. Built per spec except I subbed BC337-25 for Q4. Q1 & Q3 Idss is around 335μA. Q2 Idss is around 520μA. Q1 & Q2 idle around 330μA. R8 is so low that Q1 runs very close to Idss. Q3 idles around 210μA. The JFET specs...

It's a two-fer this week! This is the first Death By Audio circuit I've breadboarded. I've always thought their stuff was a little "out there" and this one is no exception. Before I built the breadboard, I listened to a demo on YaoTaob. Sounds pretty good. Definitely worth investigating. The...

This design was whipped up by HamishR, based on the BJFe Model G. Here's what he sent me. The main difference from the Model G is the clipping diodes. He used Schottky instead of LEDs for the soft clippers (D1 & D2); 1N4001 instead of JFETs for the hard clippers (D3 & D4). He deleted the C...

This is a simple one. Often times we want a unity gain buffer and for a few reasons, don't want or need an accurate opamp model. The main reason is that an accurate opamp models contain a TON of parts (some, over 100) which slows down the simulation. Especially when you have several opamps in...

Another One Control / BJFe creation. Similar to the Strawberry Red OD (Snozzberry OD), it has a Bass Cut up front, followed by a variable gain stage driving a Honey Bee style OD stage and a Treble Boost at the end. Typical of BJ's designs, the EQ knobs are subtle. Here's Kanengomibako's trace...

You've read the hype, you've heard the demos, maybe you've even built one. It allegedly makes the "Imminent Amplifier Death" tone. Here's my take on it. The NG-2 is basically the first half of a Big Muff driving a Tone Bender Mk II with a treble cut at the end. Seems simple enough. Mr...