Collateral FX Unchained

[Guilherme Collateral]

Disclaimer: this pedal is only related to the PedalPCB Unchained by name. I always loved the early EVH tones, and never could really bond with the voicing of the BSIAB II circuit. With some breadboarding I ended up with a active tonestack working really great, a bunch of tones available, tryied lots of different JFETS and was finally satisfied. Hope you guys like it! The video is by one of the greatest brazilian guitar players, Rodrigo Suricato, I really recommed you guys check out his work!

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[Brett]

Whoa, this sounds and looks fantastic!

 

[lrgaraujo]

In the end, which jfets did you choose? That's gotta be my favorite sounding BSIAB II variant ever!
It looks amazing, too

 

[Guilherme Collateral]

Thanks a lot man!

Whoa, this sounds and looks fantastic!

 

[Guilherme Collateral]

Thanks man! That's a secret I'll take to my grave









But also, is a mix of mmbfj201 and mmbf4393

In the end, which jfets did you choose? That's gotta be my favorite sounding BSIAB II variant ever!
It looks amazing, too

 

[mkstewartesq]

That sounds terrific. I have the PPCB Unchained, but I've never quite bonded with it (I think because I'm probably not a good enough player in that style to make it sound its best). But your pedal sounds great!

 

[Guilherme Collateral]

Thanks man! I made one or two PPCB Unchained and I didn't love it either. But I also don't love the Carl Martin Plexi Drive, so it makes sense!

That sounds terrific. I have the PPCB Unchained, but I've never quite bonded with it (I think because I'm probably not a good enough player in that style to make it sound its best). But your pedal sounds great!

 

[Bricksnbeatles]

Just stumbled upon this thread. Love the build— and great execution with the diver down graphics. Super simple and clean in a brilliant way.

 

[Guilherme Collateral]

Thanks a lot, man!

Just stumbled upon this thread. Love the build— and great execution with the diver down graphics. Super simple and clean in a brilliant way.

 

[Bricksnbeatles]

If you don't mind sharing, what tonestack did you ultimately end up going with? Thinking of breadboarding a BSIAB with a marshall 3-band tonestack and a recovery stage.

I agree that the stock tonestack is the big weakness of the original DIY circuit. It's just a BMP stack with altered values.

The original 3-knob version uses a 47k resistor in the lpf side of the tone stack, giving a sweep that looks like this:


Meanwhile, the more common 4-knob BSIABII+/"BSIABIII" replaces this resistor with a 100k "contour" pot in series with a 5k6 resistor. Giving us this range of tones (Contour 0%; 50%; 100%):

 

[Guilherme Collateral]

If you don't mind sharing, what tonestack did you ultimately end up going with? Thinking of breadboarding a BSIAB with a marshall 3-band tonestack and a recovery stage.

I agree that the stock tonestack is the big weakness of the original DIY circuit. It's just a BMP stack with altered values.

The original 3-knob version uses a 47k resistor in the lpf side of the tone stack, giving a sweep that looks like this:
View attachment 83207

Meanwhile, the more common 4-knob BSIABII+/"BSIABIII" replaces this resistor with a 100k "contour" pot in series with a 5k6 resistor. Giving us this range of tones (Contour 0%; 50%; 100%):

View attachment 83208

View attachment 83205

View attachment 83206

If you don't mind sharing, what tonestack did you ultimately end up going with? Thinking of breadboarding a BSIAB with a marshall 3-band tonestack and a recovery stage.

I agree that the stock tonestack is the big weakness of the original DIY circuit. It's just a BMP stack with altered values.

The original 3-knob version uses a 47k resistor in the lpf side of the tone stack, giving a sweep that looks like this:
View attachment 83207

Meanwhile, the more common 4-knob BSIABII+/"BSIABIII" replaces this resistor with a 100k "contour" pot in series with a 5k6 resistor. Giving us this range of tones (Contour 0%; 50%; 100%):

View attachment 83208

View attachment 83205

View attachment 83206

Sure thing man, I'll make a schematic for the tonestack and post it for you tomorrow