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Do you have a multimeter? You can use it to verify which lug connects to which of tip, ring and switched ring. You may need to insert a jack in the plug to verify the switch connection.

Robert, we need to bring back some reaction emojis. For this post I would have added 🤔

That should be an easy fix! Let us know how it goes!

One more thing: you are using a stereo jack for the first out which I think is the problem. Check out this similar problem: Thread 'Duophase build with wrong jack. 🤦‍♂️' https://forum.pedalpcb.com/threads/duophase-build-with-wrong-jack-%F0%9F%A4%A6%E2%80%8D%E2%99%82%EF%B8%8F.16762/

On my build I used switched jacks for the first out and the second in. Your second in uses a regular jack, although I’m not entirely sure that’s your problem. The other thing: there are no LDRs on your right side?

One more thing: it’s pretty common to have an emitter cap in order to have a different gain value for high frequencies (which again, could be and often is all frequencies!). Usually this is done to have a specific biasing scheme that doesn’t fit with the type of gain you want for your signal.

You can definitely correctly bias a common emitter without Re. My point is that you can’t just remove Re from an existing circuit and expect it’ll work just as well. A common emitter without Re is used for specific reasons. In a fuzz circuit we know that we want to let the quirks of the...

One more thing I should add: Re is also important for the DC biasing of the transistor. So if you remove it, the stage may work but it may absorb more current or have a poor operating point (which would cause clipping). These are all things you could calculate by hand (check out Wikipedia for...

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Oh yeah that’s what I was saying regarding the gain being different at higher frequencies because of that capacitor. The capacitor turns the circuit into a common emitter without emitter resistor at higher frequencies (note that the cutoff could be close to double digit Hz which means that all...

Oh one more thing: why would you want to omit the emitter resistor and capacitor? That will give you a stage with a radically different behavior. It would probably have to be rebiased and the gain will be much smaller (especially for Ge). What do you mean when you say bypass capacitor? If you...

A common emitter with emitter resistance has an input impedance roughly equal to beta*Re, where beta is the transistor’s HFE. This configuration also has a base resistance which is in parallel so you can do the math once you read the value of Re. The base resistance cannot increase the input...

the topology is pretty much a common emitter with feedback resistor (although the cap means that some frequencies have no feedback resistor) which is pretty standard. The base to ground resistor seems slightly unusual to me but also not that surprising.

Aka “golden shower” color? I’m pretty sure there is a Pantone with that name. 😜

For the Dumble style check out the Gladio (Robert has both channels as separate boards). I was just playing mine tonight and it sounds awesome especially with a Strat!

Man at the price these are selling for I would much prefer making my own! Do you have any extra PCBs?

That is awesome! How does it sound? Not familiar with this preamp.

I bought one directly from them. I can send you a gut shot later this week. I also can’t see anything suspicious in that pic. Sorry you are dealing with this!

Took me a couple tries to realize that the search on Tayda will return results for 1uf but not for 1u which was throwing me in a loop years ago! But once you know that secret code, all doors open.

I like the logo. It says “engineer minded only” which is just what I like! 😉