Mid/upper mid boost mod for Dream Fuzz?

[Polarbear925]

Hiya, folks! Thinking about a Dream Fuzz build. I already have an EHX Op-Amp Big Muff and I wanna do one for my DIY board (almost all DIY pedals). Has anyone experimented with a mod on the Dream Fuzz to give mids/upper mids (2k-4k) a little bit of a boost? I'd love to be able to control it, possibly thru an enclosure-mounted pot. Just need to know which resistor to replace with the pot and a good way to wire it into the PCB. Has anyone tried this and made it work? If so, wiring info? Any info helps. THANKS

 

[jwin615]

Maybe the hoof variant?

Yet Another Tonestack Calculator

Guitar amp and pedal tonestack (tone stack) calculator web app. Tweak controls and component values and compare frequency responses in real time. Inspired by TSC in the web and Duncan Amps TSC.

tonestack.yuriturov.com

 

[Polarbear925]

Maybe the hoof variant?

Yet Another Tonestack Calculator

Guitar amp and pedal tonestack (tone stack) calculator web app. Tweak controls and component values and compare frequency responses in real time. Inspired by TSC in the web and Duncan Amps TSC.

tonestack.yuriturov.com

That looks like our winner for the moment. THANKS!!

 

[jwin615]

If you use the hoof values , you can decrease C1 and or increase C2 to add a mid bump
Try 820p or so for C1
Increasing C2 will add more low mids as it gets larger
Decreasing C1 adds more high mids
This works because you have overlapped the two filters

 

[jwin615]

Mid bump shifted with different values

 

[Ginsly]

You might also consider replacing R15 on the Dream Fuzz with a small resistor (I used 300r) in series with a ~25k pot. It's part of the JHS "Pumpkin Patch" mods, and they label it as a "mids" control. There's also a Gate switch if ya wanna get crazy! I heavily modified an existing stripboard layout to match Aion's Op Amp setup plus the JHS mods, which are actually pretty useful. Posted it here a while back.