Disturbance + Tone TwEQ (solved)

[Anonymous]

Hey everybody,

I just built the disturbance and in the second step, after testing it, I decided to add a TWEQ to it. As far as I read in the threads, pad A on the board can be used to include the TWEQ to replace tone and volume control.
So I took out the two pots (but left the rest of the components on board), connected pad A to the input of the TWEQ, connected ground to the outpu ground of the disturbance and then used the output of the TWEQ.
Now the distortion of that whole thing went a lot higher and can‘t be set as smooth as before, what makes me feel sth wrong here.

Did I inderstand the meaning and finction of pad A right or do I have to do sth different?
I attached some photos, sorry for the cable-salad and not cleaned up working place 🙂 …. and thanks for your help.

[Anonymous]

Here’s the schematics I used for pad A connecting to TWEQ, is that correct? For C4 I used a 47 nF and a 10 nF in parallel, because Musikding forgot it in their kit and I didn’t have that value in stock …

[Anonymous]

Sorry, was a little too small 🙂

[Cybercow]

Ralf – I’m thinking that R1 of the Tone TwEQ can be eliminated. (But that’s just me.) Looking forward to your progress report(s) on this.

[Anonymous]

Hi Cybercow,

thanks for your help, I will try this out and see if it brings back the typical dynamics to the pedal. If it won‘t mean any progress here, I think I’ll try to replace the tone pot with the TWEQ and see if that will bring a smoother EQ effect with not as much addition if boost/distortion. I‘ll report on it, thanks again and merry christmas 🙂

[Cybercow]

Ralf – looking at the two original schematics more carefully, I would actually inject the Tone TwEQ in place the Distrubance’s tone section. I’d remove the Disturbance tone pot and C28 – leaving everything on the Disturbance from R9 forward.. The I would build out the Tone TwEQ but with a trimmer in place the Tone TwEQ’s Volume pot and still eliminate R1. IMO, that would leave the Disturbance’s dynamics completely intact. Just thinking out loud.

Merry Christmas!

[Anonymous]

Hi, yes that‘s what I meant, not replacing the tone pot of TWEQ but the tone pot of the Disturbance …. sorry for the confusion, anything else won‘t make any sense ??
Finally I did it this way, went in after R1 on the TWEQ and replaced the tone pot of the Disturbance. The pedal got all it‘s dynamics back and can be perfectly controlled by the EQ …. very nice 🙂

I also played around with voltages ans will also add an additional pot with resistor to ground, to control more dynamics and headroom between 6,5 Volt and 18 Volts. As I played around with a variable powersource this makes the disturbance even more flexibel and offers a very smooth and bluesy playing in lower voltages with drop of volume at the guitar. Pot will probably be 10k with an resistor at about 4 to 6 k to ground, pedsl power supply needs to be 18 Volt then or some kind of chargepump. I‘ll have to test that out and will report …

Thanks for your help, problem is solved perfectly 🙂

[Cybercow]

Ralf – WOOT! Great job! Glad to hear you got it your liking. Merry Christmas!

[Author]

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