Okko - Diablo Boost+ (goop pics!!)  [traced]

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modman
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Post by modman »

okko.png
looks kind of nice, but looks deceive, look inside -- ugly black stuff!!

http://www.digimart.net/images/700/DS00298624_1.jpg
http://www.digimart.net/images/700/DS00298624.jpg
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Post by soulsonic »

The circuit board needs to take a bath. A chemical bath. :wink:

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Post by briggs »

I love those cases. Huge LED's are great!
Image

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Post by neilnil »

I used to own one (without boost) and it had the thickest epoxy goop i've ever seen. The goop was hard enough to hold the PCB securely so I couldn't dare to trace it. It was quite versatile and covered a lot of grounds but lacked dynamics IMO. Pretty nice OD overall and looks really cool with that contoured face. I would guess it has ROG style fet-based circuitry.

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Post by JHS »

The basic circuit is a BSIAB1. The boost function seems to be split gain pots ala FD-2.

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Post by plexilover »

Where can i get the BSIAB1 circuit? What are the differences to the BSIAB2?

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Post by JHS »

A stock BSIAB2 will not produce the sound of the Diablo. The Diablo is a very heavy modded BSIAB2 with a lot of finetuned part values. The tone is generated by this mods and the Diablo sounds way different compared to the bland sounding BSIAB.

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Post by seniorLoco »

its rocket science i tell you :shock: modding the Bsiab2....
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Post by soggybag »

The description talks about a charge pump option. BSIAB probably sounds pretty good at 18V.

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Post by Ed G. »

soggybag wrote:The description talks about a charge pump option. BSIAB probably sounds pretty good at 18V.
It does. :wink:

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Post by plexilover »

Again, anyone who have the BSIAB1 schematic? What are the differences between BSIAB 1 and 2?
Anyone out there who modded a BSIAB?

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Post by Ed G. »

I think the term "bsiab" in this sense is used improperly. The Okko Diablo, I'm sure, uses cascading miniboosters (revealed to DIY'ers by Jack Orman) but other than that, I suspect it shares little else with the BSIAB or BSIAB2.
I urge anyone to experiment with a breadboard and fets. The minibooster is high gain, self-biasing and sounds great. When overdriven, I find it sounds much more natural than diodes clipping. There are many avenues for tone shaping.
Look up also Aron Nelson's booster 2.5 and Doug Hammond's Sweet Thing schematics for more examples.

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Post by Lawnchair »

Anyone degooped one yet? I might have to pick one up after the holidays. I'm tying to work up a body control for the BSIAB2 now.

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Post by soulsonic »

Bumping this to attach the schematic. I don't remember who traced this one or where I found it... I think I found it at Das Musikding... maybe Kusi traced it?
Anyway, I hope it is okay with the author to post this here.
:D
Attachments
OKKO_Diablo+.pdf
(60.21 KiB) Downloaded 4250 times
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Post by Saruman »

soulsonic :applause: :applause: :applause: :D

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Post by SPeter »

Thanks Man!
:applause:
:D

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Post by eddieod »

GREAT!!! :horsey:

BUT...which fet's go into this circuit (Q1....7)? J201's?

Thanks!

Edwin

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Post by soggybag »

Is that two mini-boosters followed by a BMP tone control? Similar to the BSIAB. The more channel looks more interesting, especially the bass control.

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Post by chriscustom »

soulsonic wrote:Bumping this to attach the schematic. I don't remember who traced this one or where I found it... I think I found it at Das Musikding... maybe Kusi traced it?
Anyway, I hope it is okay with the author to post this here.
:D

OKKO_Diablo+.pdf - LEVEL 10kk??? It is an error? Can should be 100k?

checco1280
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Post by checco1280 »

Hi. in the original pedal, there is a selectable charge pump inside (for a 18V supply);
according to the scheme of the power supply posted in pdf, where the charge pump should be placed? For example can I use the charge pump of geofex
http://www.geofex.com/circuits/+9_to_33.htm
before the entire circuit?

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