Suhr KOKO BOOST [traced]

[modman]

Hi,
Does anyone have better pics from the Suhr Koko Boost? He sounds awesome.

Greetings

[jstbrowsin]

[smilie=bump.gif] anybody got anything that can be traced. I'm surprised no one has done this yet??

i don't think anybody will take apart a 300 bucks pedal to discover it was your average full range clean boost and midboost in series,apart from the switching system,its something you can put together combining existing known circuits.

[shocki]

If anybody wants to trace it i can make some pics and send it to you. Just drop me a PM.

[alexradium]

I highly doubt anyone can trace it without a tester and desoldering boards...

[shocki]

Yeah. You are probably right about that. There are 2 boards over each other and the components are not easy to identify. Still I could post some hi resolution pictures if anybody is interested.

[alexradium]

you can PM pics to my email,i'll try to guess at least the architecture....

[shocki]

Yeah cool. That would help already.

[shocki]

I tried really hard to remove the board from the enclosure but I could not take it apart. Somehow the pots and stuff are connected to the board in a way that it cannot be removed easily. I have a high resolution shot of the guts. But not from the other site of the board and the second board. So this probably won't help.

[rwwalker]

Guys,

There's not much magic here...it's just a mid-boost / clean-boost.
Anyone can design this - the key is the center frequency and Q.
If I might give you a clue - check out modern graphic EQ schematics for a solution to this pedal....

bobw

[rmroza]

Looks like this thread hasbeen sitting a while. Who would destroy a high dollar pedal??...well I guess that would be me...or someone like me!

Attached is the slideshow to all of the photos for the Koko Boost. It also includes the BOM (Bill of Materials). A couple components are questionable as I tested them on the board, then off, but my iron is taking a sh*t after 25 years and decided to go to 1000 deg andvaporized them!

I sent the information to the people at Guitar FX Layouts, but it's been a long while (year or two) andthey still haven't released anything for it, so posting it here and anywhere else I/we can get some traction to get the full schematic and board made to clone it. A LOT of people use the pedal, soitmust be good and to be able to clone it, a LOT of people willbe interested in it. I don't have the time right now, but at least all of the pics, BOM, and information is available if someone wants to tackle it and be a god is some folks' eyes!

Enjoy!

http://s934.photobucket.com/user/rroza/slideshow/Suhr%20Koko%20Boost

[rmroza]

Here are pics of the mainboard

[rmroza]

Here are pics of the daughterboard

[rmroza]

Oh, looking thru my folder, I see this schematic, but haveno idea if it's correct or not.

[bmxguitarsbmx]

Oh, looking thru my folder, I see this schematic, but haveno idea if it's correct or not.

you should give credit to Joey for tracing this

[rmroza]

Thanks for the heads up, so forgetful!

Special thanks to JOEY over at the SloClone forum for drawing up the schematic!

[jstbrowsin]

Anyone going to make a PCB or Veroboard of this?

https://www.dropbox.com/s/kt3b9m7j76lo8s5/Suhr%20-%20Koko%20Boost.zip?dl=0

[bajaman]

looks interesting - can be done without relay
essentially a variable gain stage followed by a mid boost and then buffered to the output.
the unknown capacitor values should not be to difficult to figure out.
cheers
bajaman

[jalmonsalmon]

Awesome pictures! If I had a schematic I can make a PCB
I am gonna check out the pics closely to see if I can come up with something

[kukaratxo]

Oh, looking thru my folder, I see this schematic, but haveno idea if it's correct or not.

Hi everyone! In this schematic, what is the meaning of "VREF" and "CON"? Sorry I'm a begginer.
Thanks in advance.

[Manfred]

Oh, looking thru my folder, I see this schematic, but haveno idea if it's correct or not.

Hi everyone! In this schematic, what is the meaning of "VREF" and "CON"? Sorry I'm a begginer.
Thanks in advance.

The power supply and switching circuits are not show in this schematic above.

VREF means the half supply voltage, CON means the control voltage sent by the switching circuit.