[2643] Minibooster

Date: December 29th, 2019 | Comments : none | Categories: DIY.

This is an early mini-booster pedal that I found in storage yesterday when looking through some boxes of pedals.

By early, I mean that it was one of the first ones that I ever made and put into an enclosure (early 1980s). I remember that I used this pedal at gigs a few times. I always thought that it was the basic mini-booster design but once I looked into it, I realized that it was more complicated, so I traced it out.

As you can see, it is a jfet booster driving a modified mini-booster, in order to get more distortion. I’m not sure what I was trying to achieve with the value choices for some of the resistors and capacitors, but it was a useful pedal nonetheless.

I robbed the knobs off it for another project long ago. The volume pot is wired backwards and I labeled it with a Sharpie instead of rewiring it. I was going to try playing it but the jacks and battery snap were too corroded from years of storage, and it was not worth repairing.

I do not suggest that you build a version from this schematic, and I have just posted it here to show how I used the design in the (distant) past.


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