Ibanez - SD-9 Sonic Distortion  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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tube-exorcist
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Post by tube-exorcist »

How can you judge that:
mecmast wrote:All of the infos about sonic distortion are false. Not even close to the real sound of sd-9.
when you are so:
mecmast wrote:new on it.
that you even can not recognize the symbol of a Field Effect TRANSISTOR in Dirk Hendrik´s schematic and you think that in Dirk´s :
mecmast wrote:schem there are 5.
transistors ?

I think it´s better for you if you buy an original one.
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."

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mecmast
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Post by mecmast »

as you'll see in the pic i've uploaded how i did judge. i didnt count the projects i've made. anyway i do judge or not. its my opinion. i could be new on building diy projects but not new on hearing the sound. i've been playing music for 21 years. guess so you're new on talking sth.
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tube-exorcist
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Post by tube-exorcist »

as you'll see in the pic i've uploaded how i did judge.
:hmmm: As far as I remember you wrote:
All of the infos about sonic distortion are false.
But in the picture shown I can´t see any build with 7 transistors - according to Dirk Hendrik´s schematic....

I think that there are enough pictures in this thread so that you can get your own impression if Dirk´s schematic is correct or not.
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."

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Post by tube-exorcist »

But to obtain an (original) pcb-layout only following steps are necessary:
1.) Do a Google-search for "Xnview"
2.) Visit their website and download the freeware-program
3.) Install that programm on your computer
4.) Download the picture of the trackside of the SD-9 from this thread
5.) Start the program Xnview and load this picture.
6.) Use the sharpening tool.
7.) Double the resolution.
6.) Now increase the picture brightness and contrast.
7.) Then convert it to 256 grey-steps.
8.) now invert the picture.
9.) Save it as a .bmp-file

The result can be seen in the picture below.

10.) Now look for the program "Paint" on your computer - it is there
11.) Start the program and load the saved .bmp-file
12.) now clean the picture with the available tools

As you can see I already started with that cleaning. But since I don´t intend to build one, the rest of the cleaning job is up to you.
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Ibanez_SD9_tracks.bmp (1.21 MiB) Viewed 3633 times
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."

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Post by Dirk_Hendrik »

tube-exorcist wrote: that you even can not recognize the symbol of a Field Effect TRANSISTOR in Dirk Hendrik´s schematic .
Thank you :D
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

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Post by Bernardduur »

Wow, I just build one from the schematic provided by Dirk; I left out the in and output buffers (dunno if that would affect the sound) but I really like the result. The tone of the unit was weird; I liked it almost the first time I fired her up.

Weird, I never expected her to sound so..... alive.......
'No more....... loud music.......'
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Post by mecmast »

well can you post a layout from your project?

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Post by jimmyjazz »

Hello to all, I'm new to this discussion thing. I'm trying to build an sd-9, and i have used GGG diagram. It sounds great as a fuzz pedal, great lead sound. As far as distortion is concerned, it's not that great YET. It does not sound like the sd-9 my brother had. A little fuzzy for rockwork. I have used a TLO72 (need to get a 4558!), a 2N3904 (need to try a 2SC1815) and 2 1N4148's to clip. Someone out there should just post a copy from the actual pedal itself! Please?!?

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Post by tube-exorcist »

Someone out there should just post a copy from the actual pedal itself! Please?!?
If you read the thread fully you will find it.
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."

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Post by picassochild »

Have you seen Maxon MG-9 Magnum Distortion?

Image
Image

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Post by mecmast »

seems great :popcorn: how does it sounds?? :hmmm:

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Post by analogguru »

mecmast wrote:seems great :popcorn: how does it sounds?? :hmmm:
Like an EH - BigMuff Pi, simply because it contains the same pcb as an Ibanez OD9 or an Ibanez OD-850 (newer version).

Why don´t you just change some components in one of your builds to original specifications ?
C3: 0,22µF or 220n (instead of 22µF)
C5: 1n (instead of 220pF)
C6: 0,47µF or 470n (instead of 47µF)
R15: 100k lin (instead of 50k log) [volume pot]
C10: 47n (instead of 100n)
R18: 470k (instead of 2M2)
(component numbering according to the GGG-schematic)

What can we learn from that ?:
Better when you never trust a schematic from generalguitargadgets ....
...and avoid making business with companies (or individuals) who have such a poor support.

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

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Post by mecmast »

dont think so... EH can never catch the sound quality/tone of Ibanez not even get closer. Every EH od/dist pedal i've tried; made me bored. Not my style.

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Post by JHS »

In the SD-9 a lot of headroom is killed by the switching circuit. Furthermore the flip-flop softens the tone.
If you build a SD clone from the schems floating on the web it will sound different, harder with more headroom.
Compared to other 4558 the JRC4558D adds mids and compression to the tone and is responsible too for the tone of the SD-9.

BTW, the later IBZ SD-9 sound a bit different compared to the older SDs, due to a slightly different circuit design.

JHS

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Post by jimmyjazz »

tube-exorcist wrote:
Someone out there should just post a copy from the actual pedal itself! Please?!?
If you read the thread fully you will find it.
Yes i have seen all the schematics but nobody knows if they are correct. Someone who owns the sd-9 should draw a diagram from thier own circuit.

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Post by Bernardduur »

Trust Dirks!
'No more....... loud music.......'
Follow my love for pedals and amps on https://bernardduur.blogspot.com and https://www.instagram.com/bernardduur1

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Post by Dirk_Hendrik »

mecmast wrote:dont think so... EH can never catch the sound quality/tone of Ibanez not even get closer. Every EH od/dist pedal i've tried; made me bored. Not my style.
I have the same opinion. Unfortunately, when comparing a SD9 to any big muff, I'm continuously proven wrong.... :roll: In general I never tend to think that sound quality is manufacturer determined and therefore means that if one devivce is bad everything form that manufacturer is bad.
Bernardduur wrote:Trust Dirks!
That's a tough one when one cannot differentiate a FET from a bunch of lines...


@Mecmast,
Please do read this whole thread. You give the suggestion you do not read/interpret what is posted by others. :blackeye


And about that MG9...... Me I want soooo baaaaad :shock:
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

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Post by mecmast »

@Dirk_Hendrik

I'v not tried your schem. I apologize for saying "all info". The onliest schem that i'vent tried was your schem. I couldnt build from the schem i need a layout. I'll write down my comments about your schem when i build a box from yours. Anyway i've played original SD9 for 2 years and then sold it. But afterall i've understood that; SD9 was my precious, i am really regretful for that. I live in Turkey and it's really IMPOSSIBLE to find an SD9 here not even the Maxon one. From all of these reasons, i managed to build my own. Hope, i could get that GREAT tone again.

Again and again i am telling that i've been sorry for saying "all info". I'm gonna try your schem whenever i get the layout. Cannot do anything without pcb/layout. So i'll be waiting for you or anyone to post it. That's all...

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Post by jimmyjazz »

I'm gonna try your schem, Dirk! Has GGG listed the 2N3904 (which i have) as an alternative to the 2SC1815 (which i don't have), or was it ever in the curcuit at one time? Will there be a big difference in sound?

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Post by Dirk_Hendrik »

Nope.
Both 2sc1815's are used as buffers and have a 1 time (0.97) amplification only. Using another transistor type will have minimal influence on sound.
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

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