Recent content by acuevo

Moving the input wire around did not yield any discernible change. I did probe it a bit and found the hum starts at the output of the first real gain stage (ie gain 3). its faint but its the exact same noise which just gets amplified more at the second gain stage. it MAY be present after the...

Good call on audio probe! I will hack one together later this week and test for that! You are correct that the input wire runs straight over the board and down to the 3pdt. I’ve been comparing to an Abasi Pathos (highest gain pedal i have) and even out of its enclosure it makes less noise when...

i am not sure why i left all that open space at the bottom 😂 just now noticing. among the things i’m going to try with the redesign is flipping U1 around so the 9v can go in the top rather than the other side. then just swap the roles of U1.1 and 1.2.

My thoughts - op amp input traces could be shorter? 9v for U1 running too close under input section? too long a trace between R5 and C5? possibly getting interference from the LED trace or the gain pot? need ground vias for some sections that maybe don’t have the best paths to ground?

Hello everyone. Here i am with my first distortion PCB, which works, but has a lot of hum when gain is turned up past 8. Becomes much worse when tone and presence are turned up. Tone is pregain, presence is post gain. Weird thing is when i breadboard this its no more noisy than any other high...

I assume this logic applies to clearance between traces/pads and the ground pour as well? I try to keep traces and pads well away from each other when possible… SMT is a very different animal from laying out a through hole board in that regard for sure though.

How about clearance specs? I’ve been using .254” as well for signal and just used the same spec for minimum clearance but i wonder if it can safely go tighter? I know i said it once already but this is a GREAT freaking thread :D

The pickup worked well for what i wanted to achieve but the downside was the tonality really wasn’t very adjustable since the pickup measured 16k ohms or so and was stuck there. With the transformer being only 600ish ohms you can stick the series pot afterword and in theory simulate a wide range...

Ahhhh yes for going in front of a low impedance fuzz i think it would be fine. An active LPF definitely would not help with that. My approach was similar but for different reasons - I have an active guitar that i’d like to more closely match to my passive guitars (its overkill in output and...

Have you breadboarded the simulator, and if so what did you think of the results? I tinkered with it some and frankly wasn’t super impressed with it. I saw much better results by using a whole humbucker i had laying around in place of the transformer 😂 I have been meaning to get around to just...

I’m literally bookmarking this, awesome info here! Thank you again!

All of this is incredibly helpful!! Thank you!!

So… SMD layouts/components I’ve searched and more or less want to confirm what i’ve found across several sources on the interwebs. Film caps mostly become C0G MLCC caps? except for higher values some prefer through hole films? Package size 805? Thick film resistors? Package size 603 or 805...

Wow what an awesome thread this gives me a lot to think about. Time to simplify some of my controls 🤣🤣

I had that same thought, gonna do a search later!