Electronics > Beginners
Passive Components in Guitar Pedal Input Stage
Zero999:
--- Quote from: floobydust on August 17, 2018, 09:48:54 pm ---As a signal source, a guitar has cable capacitance, pickup inductance and RC tone controls. Many variables that are unique to each instrument and setup. Add that to the Spice model and I think it would be risky. I've never seen bootstrapping used on a guitar preamp front-end. Sure it could work. But across permutations of guitars and settings, not my style.
I think OP would be better off using the JFET input stage instead of this emitter-follower.
Electrosmash has this J201 front-end with ESD protection diodes. You get some low-noise voltage gain instead of zero voltage gain with the emitter-follower.
--- End quote ---
I agree on the J-FET input stage. It might have a higher voltage noise but the current noise should be much lower, which will matter more in this case.
eev_carl:
--- Quote ---The link to the Tube Screamer doesn't work
--- End quote ---
The link is fixed.
eev_carl:
--- Quote ---Also thanks eev_carl for startiing the thread.
--- End quote ---
Look for upcoming questions on diodes and clipping, filters, and the output stage!
eev_carl:
--- Quote ---I think OP would be better off using the JFET input stage instead of this emitter-follower.
--- End quote ---
This came in the mail today!
langwadt:
make sense to use a better model of a pickup, first hit on google.
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