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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Tuesday, 28 February 2012

B K Butler - Tube Driver

The B K Butler Tube Driver has been used by several of Rock Guitar's greats - David Gilmour and Eric Johnson to name just two. There are many schematics out there as well as a wealth of PCB projects. I've looked to compile the best and most reliable for this post. If you're wondering how these things sound here's a demo for you:

Firstly a gut shot of an original unit from around the '79-80 "Garage" (He originally made them in his garage!) period:

And a hand drawn schematic along with notes:

You could build that one if you fancy, however, bajaman took apart a reissue B K Butler Tube Driver and posted up his own project which is verified and working, and sounds great to boot - it also includes an interesting "Bias" mod which allows you alter the voltages seen on the tube's grid which will alter the character of the clipping:

B K Butler BAJAman project schematic

PCB Layout
PCB Top Layer
PCB Bottom Layer
Tube Bias mod layout

Footswitch wiring key
And here's the freestompboxes.org thread: http://www.freestompboxes.org/viewtopic.php?f=13&t=1171


  1. How to have a size of plate? 80 mm x 40 mm or 40mm x 20mm?

  2. do you know what the 2.5 volt zener diode is for?

    1. This comment has been removed by the author.

  3. muchas gracias desde chile!!! yo tuve complicaciones, pero supe resolverlas!!! suena excelente y sin ruido. mi unico problema es que el potenciometro de volumen no funciona, pero lo solucione con un transistor agregando una nueva etapa de salida!! MUCHAS GRACIAS!!!

  4. This is awesome. I had a BK Butler with the bias mod a long time ago and regret selling it. Maybe this will make up for it.

  5. I have a problem with mine, when I increase the treble, the whole sound becomes too thin and the overal volume drops, also there's a really anying hum no matter how I set the knobs.


Comments are welcome on Revolution Deux. However, please do not spam links to unrelated sites - these comments will be removed! Thanks - Briggs.