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Im planning to do 1 (leave C1), 3, 4, 5, 6, 7(leave 14), 8, 9, 10, 12 C7, C9-C11 film C13-C14 tant C25k for depth I'm mostly writing this down for personal reference or ill forget by the time parts get here. I'm still a little confused on when and where to use tant caps because I there's lots...

what value did you use for Depth? im putting together my parts list right now

If you were to go for a fixed resonance, how much boost would you aim for? I want to try this out on fretless and have a switch for flat or peaked resonance. I'm thinking a +6db resonance boost would be good but im not familiar with this style of preamp. 3db seems like it would be too...

Following. I've never had a rat and it seems like a must have for a complete pedal arsenal

I upped the hpf cap on my nobelium build for upright and its now set at around 50hz. It's pretty perfect for my upright to leave on all the time. I don't think think a steeper filter slope is al that necessary tbh. Steep analog filters do weird stuff to the phase response and create a resonance...

Awesome! I've had this one in the list for a while

There are some good calculators for gyrator EQs online. This style of eq is used in the ppcb "6 band EQ" project. The easiest thing would be to copy this circuit, only use three bands, and change the values based on your calculator. The eq in the first picture is a passive EQ like you would...

I use a DC-2 most often on my HX stomp. Every setting just sounds good and I don't have to mess with anything

Since my last post I have learned how to design boards in kicad, somewhat learned how to hot air solder, and learned more about SMD components in general I almost have a boost/drive pedal mocked up and will hopefully be ordering boards soon. I haven't heard from the guy who wanted this...

I just found out about these boards and ill defiantly be building one as a dedicated reverb pedal. I'm kicking around the idea of building a pedalboard just for my fretless bass. I'd love to have a harmonizer pedal to get this type of sound at 4:15 I saw a pitch shifter in one of the git...

Thats a cool thread that I haven't seen before. Ill add it to the list. The isolated DI using a cheap transformer is also a cool idea

Working on v1.1 I've implemented most of passinwinds recommendations and adjusted the frequency bands a little bit to get closer to what I want. I flattened out the eq "preshape" to be slightly flatter and the output is now closer to unity. I kept the bass and treble section the same format as...

Thank you so much @Passinwind ! I've spent many hours reading your preamp thread. Its definitely inspired me to try designing stuff myself. I'm nearly through an Electrical Engineering degree. I've learned a lot of math and theory in the past couple years, but now I need to learn some more...

I'll be using a quad op amp , the op7s are just the generic op amp model in ltspice

A friend of mine has asked for a 4 band preamp for his bass. I've built a good number of pedals, but really haven't designed much myself. I'm taking on the project as a learning experience and will be documenting my progress here, mostly as just a log for myself but also to get feedback from the...

Post #180 https://www.talkbass.com/threads/conspiracy-to-commit-electronics-megathread.1640493/page-9

Just finished up. I added an 11meg/5.5meg input impedance switch. The 11meg is too bright on upright bass, I prefer the 5.5

Finally wrapped up

Would it be noisy to have the input resistor on a switch? I've read some people prefer 5.6 meg and some people prefer 10 meg for piezos. I'd like to try both out

Heads up I think there may be some minor mistakes in the BOM. Double check the schematic if you're ordering individual resistors. It shouldn't be a problem for most people since most people order resistors in packs of ten or more