What's New?
8/6/09: I've been working this week to give the website a bit of a facelift. This news section has been added as part of that process.
8/20/09: Two new pages added - Adding a digital reverb to an old tube amp and 8/25/09: Read about turning a Russian Big Muff Pi into what I call a "Super Muff" HERE. 8/28/09: Work has begun on designing the first production guitar pedal I will offer for sale through this website. 8/29/09: The Gregory Amps Page has been updated with some info on a previously unknown model - the "Reverb 900". Also a schematic for the Mark V & Gemini 700 has been added. 9/4/09: I'm a roll lately. I added a new page on what has to be done to install a Seymour Duncan Allan Holdsworth pickup in a Parker Nitefly Mojo guitar. The pickup AND the guitar both had to be modified to make that work! 9/5/09: I've been working all week giving the Pedal Dude FX Pages a complete overhaul and several improvements. 9/8/09: The Gregory Amps Page has been updated with a schematic for the "Reverb 900". 9/18/09: The Seymour Duncan Convertible Page has been updated with a link to an ad from the 1987 issue of Guitar Player magazine showing Jeff Beck as an endorsee. 9/21/09: Parts 3 and 4 have been added to the Fundamentals of Signal Processing pages - the decibel and harmonic distortion. 10/1/09: The Gregory Amps Page has been updated with pictures of the Twenty One A head, the Twenty Two A head and the "Add-Verb" standalone reverb unit. 11/27/09: The DOD FX-17 page has been updated with a troubleshooting & repair section. 12/19/09: The Gregory Amps Page has been updated with some information on the unusual "Handi-Amp II". 12/24/09: The Gregory Amps Page has been updated with some information on what I believe is the original version of the Mark Eight. 2/19/10: The Gregory Amps Page has been updated with some information on the Atlas 1000 model. 2/25/10: The Gregory Amps Page has been updated with a link to some pictures from the 1966 Gregory Amplifier Corp. catalog (at bottom of page). 3/21/10: A page has been added about how I added a Fernandes Sustainer to one of my guitars. 4/26/10: A page has been added on how to repair an EQ Module for the Seymour Duncan Convertible guitar amp. 5/17/10:The Gregory Amps Page has been updated with a schematic for the "Mark XX" model. 5/30/10: The Gregory Amps Page has been updated with a some new information on the "Mark Sixteen" model. 6/25/10: Information on a third version version of the Gregory Mark XX has been added to the Gregory Amps Page. 6/30/10: Page added on what needs to be done to replace the noisy OEM switches on the Parker Mojo Nitefly. Click Here for all the details. 8/7/10: Details on how I added digital reverb to my Octal Fatness tube amp build. 8/18/10: The Gregory Amps Page has been updated with some information on the "Mark XV" model. 8/18/10: The Gregory Amps Page has been updated with some information on the "Saturn 80" model. 2/24/11: The Seymour Duncan Convertible Troubleshooting/Mods Page has been updated with some information on how to eliminate channel "cross-talk". 4/7/11: The Gregory Amps Page has been updated with a schematic for the "Mark XXX" bass amplifier. 4/15/11: New Maestro Boomerang Page written by Joe Gagan has been added. Still under construction but mostly completed now. 4/17/11: Page added about my 1995 Parker Fly Deluxe highlighting its features and design. 7/23/11: An error on the second schematic shown on the Fat Wah Page has been corrected - I had the switch shown in the wrong place. Sorry about that! 8/23/11: I have completed a new project! It's a 12-string tapping instrument called the "Tone Ladder". Click Here to see a narrated picture slide show video of how it is constructed. Click Here to see what it sounds like. 12/12/11: The Gregory Amps Page has been updated with some information on the "Mark XXV" model. 1/6/12: The Seymour Duncan Convertible Page has been updated with revised CAD power and preamp schematics. (Some clarifications have been addded to the preamp and power schematics, and a few minor errors were fixed on the power schematic as well) 1/7/12: The Seymour Duncan Convertible Troubleshooting Page has been updated with a link to a page describing what has to be done to work on the can type caps. 1/9/12: The Seymour Duncan Convertible Schematics Page has been updated with a link to a component layout for the main PCB and a link to a zip file containing a few service bulletins applicable to early manufacture Convertibles. 1/19/12: Added a page about the Korg Polysix synthesizer. 3/28/12: The Gregory Amps Page has been updated with some information on the "Mr Show Biz" amp.
2/15/13:
The
Gregory Amps Page has been updated with a link to an undated Gregory Amps Brochure.
2/28/13:
The
Schaller "Bow Wow Yoy Yoy" schematic has been revised and verified with an original unit. The PCB layout has been revised accordingly.
3/20/13:
The
Twin Reverb Chassis Layout Page has been updated with new layouts. One of them shows how to blackface a silverface amp.
My new DIY pedal board.
Do these mods to your own Big Muff Pi and you'll be muffin' big time!