Welcome to the Revolution

Hi there, welcome to my blog - La Revolution Deux. It's an odd name - but I like it! Here you will find all the info on my various DIY Guitar effects builds, amplifiers and guitars. Everything from a humble Ibanez tubescreamer to the holiest KLON Overdrive.

You may also find a few effects builds that I am looking to move on - usually in exchange for other effects/gear/cash. You can always check my ebay account to see what I've got up for grabs.

Have fun, enjoy the blog - Fred Briggs :-)


Feel free to get in contact with me about anything you see on this blog or with any general questions about guitars, amplifiers and effects, I'll be happy to answer! Just click the button above to email me directly or alternately my email address is fredbriggs2007 [at] googlemail [dot] com

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Friday, 13 January 2012

Mad Professor - Blueberry

The Mad Professor Blueberry is a bass overdrive that is based around the BJF Honeybee circuit. Lohstah over at the freestompboxes forum decided to trace one and this is what he found;

Check out the Mad Professor page for more info or have a look at this youtube video;

There is a full PCB layout here, in the freestompboxes thread;



  1. Great page! I've seen that MP uses zenerdiode 5v1 (D4) in many of his pedals. What's is the purpose for this? thanks in advance

  2. To ensure right voltage for LED.


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