Vandal - a 2-channel preamp inspired by the Randall RG100ES

Original effects with schematics, layouts and instructions, freely contributed by members or found in publications. Cannot be used for commercial purposes without the consent of the owners of the copyright.
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Post by fcoberrios »

PCBGuitarMan wrote: 02 Jun 2021, 15:49 I really love these types of circuits, which are only available in the DIY world!

This is a great pedal; it really captures Dimebag's tone. I call mine " Vandal from hell" :twisted:


I finished mine using 2n5458 transistors, and it sounds pretty brutal. I'll like to try how it works with J201 next.
I used a 3pdt toggle on the first batch, but I'll go back with the 4PDT for the channel switch.

I really recommend this build to anyone who's looking for an excellent Metal pre-amp.
I have made some PCBs for anyone who'd like to try this brutal high gain pre-amp/distortion.
1.- Where did you got your 2n5484?
2.- How does it works with the j201? Did you tried it?
3.- Are you working on something (Randall) new? 👀

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Post by PCBGuitarMan »

1- I think i got 2n5484 long ago at Musikding.
2- With J201 you really need to feed the pedal with 24v to get some nice dirt out of it
3-Yes! We are preparing the Randall Warhead x2. Waiting for the PCB to arrive :)
I'm here to help you building great pedals.
Check out our boutique effects PCBs at:

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