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Asymmetrical clipping to emulate tubes is on point on this design. Now I want to build one!

EE here. I'm currently working on development and automation of chip design and verification flows for a satellite company. I use chatGPT all the time, is like having a genious intern for free!

>90% of the problems come from cheap pots, jacks and switches, and handwiring. Use good quality components and use a PCB for the 3PDT. That will cover most of the issues.

Are both leds lighting up when working? I would directly go for replacing the 2 leds and the spdt switch.

Yes, same circuit response is expected. Both symmetric

There's extra capacitance and reverse bias current, but it should be small enough for the human ear to hear no difference. I like having the liberty of choosing one or the other, to wire an SPST to short diodes for a different clipping option (on topology 1 it will lower the threshold voltage...

Commercial != industrial Lots of DIYers sell their stuff. Call it boutique and ask chatGPT for fancy marketing words xD Just try to use good quality components (less failing), and develop a process good enough so that you don't have to put a lot of hours per pedal and avoid having to...

I would experiment on known designs using less feedback. When designing amplification stages, even with low gain, it is desired to use high hfe transistors with negative feedback. That compensates the big % variations of the between transistors (really good for mass production), and also makes...

HiFi chips are definitely overkill. In the zendrive design the clipping is done with the mosfets and schottky diodes in the opamp feedback loop. Chips like the TL072 already have good enough noise specs and slow rate for these applications. The only reason why I can think you might want to...

Yes, but is basically what you did here: The original design of the pultec EQP-1A was not meant to boost and attenuate the low frequency at the same time. This is directly from the operating instructions: But the studio engineers that used the pultec EQ because of its multiple controls and...

It does the pultec trick!

Thank you! 🙌🏻

Beautiful job, kudos! PS: I just saw the bottom detail with my username! haha, shouldn't it say "developed by XTS"?

Yes. Using a voltage divides as that gives you a source impedance of 5k ohms (10k and 10k in parallel). It means it drops 5V for every mA of current you use. You should try with a low impedance source, as a regulator IC (78L05) or a power regulation circuit.

This

I was going to reply, but JTEX stole the words from my mouth. So all the above for me too!

PCB design is not just to avoid having hundreds of wires connected by hand. In the real world, the wires and PCB traces are not perfect conductors: every trace/wire induces an electromagnetic field that affects all the other traces/wires in the design. That's why PCB designers use techniques as...

Also, p There are noise and signal integrity reasons too.

I'm an electronic engineer. A mechanical 3PDT switch hand soldered (specially if you are soldering individual cables by hand) is definitely way more prone to failure than a relay. As a hardware product maker, when you think quality, you don't think a design that is easy to fix. You think a...

I'm from Argentina and I'm used to this crap already. I ordered some PCBA last week. Payed 85 US dollars in product and 40 dollars in shipping on the JLCPCB site (used DHL express. Mail shipping was 30dollars and takes 2 to 3 months to arrive). To get it into the country I also had to pay 30...