[fireman257]

First off is it a tube amp or solid state amp if it a tube amp it is done with the staging of the tubes and the voltage applied to them and that voltage can kill you real easy but if it is solid state it is done with ic's either way you would be better off buying a good pedal cause the solid state one uses lots of the circuits on the pc board to do this but you could take out the ic's that you need and make your own pc board but 9 out of 10 times if you don't know what you are really doing you will mess up the ic's on removal and the ic's are cheap like $4 if you want to build one get a DIY kit comes with everything you need.