All About the Big Muff Pi Tone Stack - Siberian Mods Part 3 

No worries. I just transferred all my goof ups to here so no one else had to make them. LOL

Glad that helps. Let me know if you have any other suggestions.

Anything in particular about the Rat circuit?

@@erikvincent5846 general mod options like they were presented in this series for example. This format of showing the mods and how they sound is very handy.

If you want a BMP circuit, have a look at Aion's Halo variant, it provides a circuit to toggle between two different sets of diodes. Otherwise, it's actually a really simple mod to DIY. Anywhere you have a pair of clipping diodes in a circuit, you can just remove those diodes and solder the start and end pads out to a switch, and wire up as many diode variants as the switch is capable of (even use a rotary switch if you're feeling adventurous). That way you can take a pedal kit you like, and add the diode switching options to it, rather than settling for whatever's on the market. Edit: GuitarPCB's BMP has an optional mod for adding a 3-band EQ to the circuit also

For distortion, the Tasmanian Devil has switchable clipping methods. As of our PCB kits, we typically set them up with the idea in mind of socketing things and switching out components. The Siberian in this video (and in the past two) is a socketed Big Muff Pi, which we also offer in our store. The build doc goes over the swappable options.

Another option would be to use an online version, which you can find here: www.diyguitarpedals.com.au/tonestack/bigmuff.htm As of just changing C1 to 100nF, that does create a hump in frequency (as opposed to scoop), with the hump at around 200 Hz. One way I'd get a mud-scooping tone stack is to keep 39K for R1 and 22K for R2, but change C1 to 4.7nF and increase C2 to 47nF. This puts the scoop at about 450 Hz. With C2 at 33nF, that puts the scoop at 500 Hz, but its a less pronounced scoop. With C2 at 22nF, that puts the scoop at about 650 Hz, but even less pronounced of a scoop.

@@erikvincent5846 thanks! - just to update i decided to just swap around the capcitors so C1 is at 10nf and C2 is at 4nf which seems to be pretty good at boosting the 1k response :3

Should be applicable as the moscow mod still utilizes the same tone-stack for the most part.

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8TxzT1vJ8R8.html

And there are a lot of folks who do that!