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AMZ is a resource with information about guitar effects pedals, stompboxes, audio circuits and tips on how to build them. There are fuzzbox schematics, signal booster projects, audio mixers and much more available free. Take some time to browse the site and discover information that can help you with your next DIY effects pedal project. You might decide to build your own clone of a classic!

Browse the free pedal building info in the Projects section, the Lab Notebook, the Guitar FX blog or many of the links in the left column. Enjoy!

Latest posts from the AMZ blog page:

EHX Satisfaction Fuzz
March 24, 2014

The Electro-Harmonix Satisfaction Fuzz has been rumored to be a Maestro FZ-1 but after looking at a pcb photo that I saw in one of the guitar forums, it appears to be a Jordan Bosstone. The part numbers are even the same as on the Bosstone schematic I found. You can’t build one for the […]

CLM6000 Replacement

Several of the classic Craig Anderton projects used the CLM6000 optocoupler, which has become difficult to find. The question then is what to use as a replacement for it. I downloaded the CLM6000 datasheet and then checked the Silonex datasheets to find a similar part. It turns out that the NSL-32 opto is almost an […]

Tinaja Quest

While searching for a detail about mosfets today, a search link led me to Don Lancaster’s Hardware Hacker archives. I had not been to his site in a long time, and while much of the computer info is outdated, the basic electronics stuff is still golden. There is a wealth of info there, so check […]

Little Angel Chorus – NYE
March 19, 2014

Over the holidays just a couple of months past, I laid out a pcb for the Little Angel Chorus. After building it, I found that a few changes were needed to get the most out of it with my rig.

Differential Distortion 2
February 4, 2014

Ken Willmott published the Differential Distortion design in Popular Electronics, August 1995. He revised the design in 2014 and it is included on the AMZ schematics page with his kind permission. Thanks Ken!

NPD: EHX Soul Food Overdrive
January 21, 2014

New Pedal Day! The EHX Soul Food Overdrive. I spent about 30 minutes looking at the pcb, and as far as I can determine, this pedal does seem to be a Klon Centaur clone. At least it matches the schematics that are posted online, which is my only reference. I couldn’t see the clipping diodes […]

NPD: Seafoam Chorus
January 18, 2014

New Pedal Day! Keeley Seafoam Chorus More to come as I get some time to play with it.

3PDT switches
November 8, 2013

Here are the Standard 3PDT, Pro 3PDT and Premiere 3PDT switches…

Some of the projects that can be made with the AMZ pc boards:

  • Jfet mu-follower boost
  • Mosfet booster pedal
  • Guitar Direct Box
  • Dual Output Booster
  • Boost and Buffer
  • Dual Buffer
  • Re-amplifying Interface
  • Silicon Transistor Booster
  • AMZ Muffer
  • AMZ Muffmaster
  • A Dirty Boost
  • AC128 Germanium Transistor Booster
  • PNP Rangemaster-type Treble Booster
  • Germanium Transistor Buffer
  • Jfet Transistor Booster
  • Jfet Transistor Buffer/Line Driver
  • Mosfet Transistor Booster (not the AMZ Mosfet Booster)
  • Mosfet Buffer
  • Power Supply Filter
  • 9v-to-18v charge pump
  • True Bypass Relay System
  • and more!

AC128 transistor GERMANIUM TRANSISTORS: I have plenty of the 2N1309 and 2N404 germanium transistors, fully tested and guaranteed. They work great in fuzz or booster circuits. Order a pair before they are gone.


Quick Links to AMZ Content
•   Technology of the Mini-Booster
•   The Case Against True Bypass?
•   Is it Legal to Clone?
•   How to wire a DPDT Switch
•   Fretboard Care
•   My Homebuilt AX84 Amp
•   Free Soundcard Oscilloscopes!
•   How to Solder
•   Dr. Quack, Mosfet Boost, Mini-Booster and more!
•   Capacitor FAQ
•   Info About Copyrights
•   AMZ Sitemap

Update - Read about the history of the AMZ Mini-Booster circuit, its origins, and pre-Internet status.

NEW ARTICLES! Bypassing the BMP tone control is a new article in the Lab Notebook section of the site. The Double Tone Control, Tone Clippers and the basics of Pedal Impedance are also recent additions.

The Mosfet Booster, Mini-Booster, Overdrive Pro, Shaka 5 and other complete, ready-to-build guitar effects are located on the AMZ Projects page. Top quality and Excellent sound is Guaranteed. Build one today!

Is it Okay to Clone? Get the info about circuit cloning and copycat pedals!

The Q&D Compressor articles are still available here but the SSM2166 chips are sold out.

The previous AMZ home page is still available as it contained a few links not on this revised version.

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AMZ Effects Projects
PC boards for boosters,
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AMZ Big Muff and Rat ebook
A Close Look at The Big Muff and Proco Rat
by Jack Orman
Our Price: $7.00
Availability: Usually ships within 24 hours. 14 pages (Nov 2001) - sent via email!

Big Muff Pi Distortion

by Electro-Harmonix
List Price: $116.00
Our Price: $76.99
You Save: $39.01 (34%)
Availability: Usually ships in 1-2 days

Analog Music Projects v1.1; Mini-booster Issue

by Jack Orman
Our Price: $12.00
Availability: Usually ships within 24 hours. 20 pages (Feb 2001)

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