(+ and - inputs of the gainstage are in wrong direction...
regards, ksui
Hello Kusi... in this schematic, is this 100k pot "Level A" along with the 47k resistor are OK or should I stick in the first schematic? And what about the 1uF-1k RC behind the "Level A" pot?
Any possibilities for a vero layout, or would vero be too difficult to manage? I'm trying to work on a very layout based on a TS vero layout I found, but there is much I don't understand. For the first op-amp stage, should the signal enter at the 5th or 6th pin? The vero layout I have for the tube screamer shows the signal entering at pin 3, but the schematic I have for the tube screamer shows the signal entering at pin 5. I understand you can use either op-amp, but what would make better sense when building up a circuit like the BB Preamp?
I'm trying here, but I have to admit there is a lot I don't understand here. I would like to see a layout by one of the gents here that has a bit more experience.
Well, I gave it a shot. Maybe one of you more experienced designers might improve on it. Either way, I'd like some feedback. This is the first layout I've completed (or really attempted for the most part). I started with a Screamer layout and used it as far as I could, and I continued with the vero layout for the active tone stack that was posted in a build report for the BB Preamp. The layout kind of falls apart after the second op-amp stage. I would appreciate any pointers or corrections, and I'd like to make the board shorter as well.
Hopefully I didn't miss anything, but here goes...
i just checked the IC-Pinouts. IC1a is wrong in your layout, because i draw an error in the schematic as i wrote it before in this thread. please google for "non inverting op-amp stage", and you will see the basic function of IC1a.
Nice work. There seems to be more than one version of this schem, though. It looks like the one you've got here came from a trace done by KHE in Jan 2006. But there is another trace from later that same year that has uses a dual 100k for volume control.
Attached below is a pdf I have of the second trace. I have a layout of this one, but it's double sided.