- Build Rating
This is yet another revision of my "Hard Rock Pinnacle Purebred Drive", which is a @Chuck D. Bones modification of the Animals Diamond Peak Overdrive. Here is the build report for the first PCB revision, here is the second.
I actually did a one-off third revision, see here. The third revision changed the circuit slightly: specifically, it used a BJT input instead of JFET. Chuck initially used a BJT (like the Animals/Skreddy version) in the initial design, but changed to JFET. The change is definitely for the better, as at least on my BJT-based board, it was noticeably noisier.
The main change with the revision shown here (besides going back to JFET input) is an integrated buffered electrical bypass. In the previous link to the third revision talks about the design and evolution of this circuit. My goal here was to create a Boss-style buffer and bypass scheme (though Boss uses discrete components, I'm using ICs). I have this circuit on its own through-hole board, a pre-assembled SMT version, and now I'm integrating in into my favorite effects. Naturally, I had to start with the drive that has lasted the longest for me, the Hard Rock Pinnacle.
It worked great on the first power-on!
I recycled the enclosure from the second PCB revision.
I socketed the "money" transistors, Q2 and Q3, the "money" devices that give the drive its overdriven tone. This circuit is designed for low-gain silicon NPN transistors. I have several I want to try.
I actually did a one-off third revision, see here. The third revision changed the circuit slightly: specifically, it used a BJT input instead of JFET. Chuck initially used a BJT (like the Animals/Skreddy version) in the initial design, but changed to JFET. The change is definitely for the better, as at least on my BJT-based board, it was noticeably noisier.
The main change with the revision shown here (besides going back to JFET input) is an integrated buffered electrical bypass. In the previous link to the third revision talks about the design and evolution of this circuit. My goal here was to create a Boss-style buffer and bypass scheme (though Boss uses discrete components, I'm using ICs). I have this circuit on its own through-hole board, a pre-assembled SMT version, and now I'm integrating in into my favorite effects. Naturally, I had to start with the drive that has lasted the longest for me, the Hard Rock Pinnacle.
It worked great on the first power-on!
I recycled the enclosure from the second PCB revision.
I socketed the "money" transistors, Q2 and Q3, the "money" devices that give the drive its overdriven tone. This circuit is designed for low-gain silicon NPN transistors. I have several I want to try.
