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, 25 September 2009

Blackstone - Mosfet Overdrive

In the realms of solid state overdrive pedals a lot of contenders claim to be "tube like" and have that tone which only a true vacuum tube can provide. However, few actually deliver on that promise. After having played around with the Blackstone Appliances Mosfet Overdrive circuit I can safely say - it sounds damn good! Certainly tube like and very responsive. This is partially to do with the CMOS inverters found in the circuit design (Which is where the mosfets come in, within each inverter stage are two mosfets ;-) For those that were wondering) but is also partially to do with the interesting use of the front end opamp gain stage.

For anyone looking for a different tone than the standard tubescreamer I'd recommend you give one of these things a go! Check out the youtube demo, I love the tone;

Here's a schematic drawn by RipDivot; http://www.mediafire.com/?eqs17owjkdf8kip

And here is RipDivot's excellent vero layout;

For a great PCB layout check out Madbean's Mysterioso ; http://www.madbeanpedals.com/projects/MysteriosoJR/docs/Mysterioso_JR_ver2.pdf

Here are some images of a great build done by MichP -


  1. hello, i have one of these I purchased off of a forum, I have a problem with it and need to get it diagnosed, but I cannot seem to find a board for the myserioso sr, only the jr...i looked all over on madbeans website...would you happen to have a copy of the schematic for this? i am sure my tech will request it.


    boleary2 at mac dot com

  2. years later and no comments. this layout is awsome

  3. This comment has been removed by the author.

  4. Hello ! just a question for the moment
    SW3 is a SPDT, and it seems to have 3 positions ...
    Is it a On/Off/On, or just a On/On ?
    Thanks !


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