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Have you tried audio probing yet? Before trying to desolder parts this is a simple and useful way to see where this extra noise might be being generated from. All you need is a 100n cap, some wire and a jack If you have a looper pedal. Use that to generate some noise then place the test probe...

Isn’t that @manfesto logo??

Awesome @Fuzzonaut - I love that aesthetic How does this compare to a PPCB Hydra?

Looks great @MattG What are you doing for the switching? Is that the pedalpcb relay design?

Very nice @music6000 Also that looks like a very neat and tidy layout @Grubb

I’d way prefer to build this over an amp kit! It’s the massive cost of transformers that puts me off personally. I like that this is PCB based and not turret board. I’d definitely be interested in any further similar projects and I’m sure I’m not alone!

Fantastic that you got it working @Phil hodson. Well done for persevering. Your statement above is what it’s all about! So many people just want answers and quick fixes when it comes to trouble shooting but the best way is to learn and progress as you go. That’s why I love reading...

The Arche boost might be interesting as it has a low control. https://www.pedalpcb.com/product/pcb450/ There is also this vero layout of the fuchs plush clean - is this the pedal? https://tagboardeffects.blogspot.com/2016/03/fuchs-audio-plush-cream.html?m=1

Guitar is my primary interest but I am alway happy to learn the ways of the lower frequencies!

Thanks @Feral Feline I’m thinking of designing my own OD pedal with a 6 band active EQ section like the MXR. Six band EQ. I was planning 150hz (bass), 700hz (lower mids), 1.1khz (upper mids), 2.2khz (lower treble), 5.5khz (upper treble) and then 8khz as presence.

If you could design your own active EQ pedal what bands would you choose and why would you choose those frequencies?

This stuff is next level! That 3D printing is crazy.

That is fantastic! I love the minimal look of this. That LED placement looks great too.

That’s what she said.

I haven’t looked at the schematic but those op amp voltages look off. I’ve never seen OPA2134 ICs with that print before. Where did you get them? Could you swap for two TL072s?

That is immense @chongmagic - I’m definitely interested in building one of these. How does it compare to a hydra?

Where have you grounded the circuit? You are using insulated jacks which don’t connect to the enclosure. I would run a wire from a ground point and touch it to the enclosure and see if that makes the noise go away.

I only ever design two layer boards but I place a ground pour on both layers which can reduce cross talk between traces. That could be causing your issue. Have you also ruled out it’s not your power supply? Try it with a battery only if you can. We’d need to see pictures of the board and...

With out the mod - With the mix pot at 100% wet you get a kill dry type effect IIRC. With pin 3 of the pot clipped you keep the dry signal in all of the time and add the wet signal back in with it. I personally prefer it with the mod but you could always put it on a switch. Great builds...