Re: JHS Superbolt

Posted by motterpaul on
URL: http://guitar-fx-layouts.238.s1.nabble.com/JHS-Superbolt-tp8459p29736.html

Thank you Frank. The circuit DOES need to be brighter and that looks like a good solution.

I tried changing the 4.6n to 1n,  but in my case it caused the FET design to underpower one of the gain stages, so the notes didn't have enough attack. It also didn't really make the tone knob work, it just changed the frequency response of the circuit. It did stop the switch from making the amp die out, though.

I ended up just removing (and jumpering) the tone control pot and now it sounds decent but it could be brighter.

BTW:  a couple things to tell you:  I met a guy who has an actual Brunetti amp, and it sounds really good. Also, I got some LT1054 chips in (to replace ICL7660s) and I used it in this Superbolt circuit. As I recall I had problems getting the 7660s to give me 18v (even tried the cut) with this design, but when I put in the LT1054 it came right to life at 18v. Those are great chips.