Jan Ray Clone (9V⇔18V Internal Voltage Boost Switching MOD) This was made as part of my studies during the COVID-19 pandemic. It incorporates a 9V/18V internal voltage boost switching circuit into the Jan Ray circuit. Functionality has been checked before listing. The hole in the back is for easy adjustment of the saturation trimmer on the circuit board. Since an internal voltage boost circuit is installed, please be sure to use a 9V power supply. Looking at it again, I can see that I went through a lot of trial and error. I think I also used parts that aren't very common in typical effects pedals. I liked using it quite a bit, but I don't use it anymore, so I'm offering it to someone who will. No claims, no returns. Feel free to negotiate the price. When shipping, it will be wrapped in bubble wrap and placed in a cardboard box (dedicated box).