Ibanez - BS-10 Bass Stack  [schematic]

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

Hey all!

I just got an Ibanez BS-10 Bass Stack in and wanted to know if someone has something like a schematic of this beauty...... as it looks some has been modded to this unit.

Thanks!
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Bernardduur
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Post by Bernardduur »

OK, had some time, I traced the unit :D

So here it is

This was in the unit I have

I "think" this is the stock version

I "think" my unit was modded as there were items on the "wrong" side of the PCB + some of the original parts were removed. Sounds really nice btw

VR1 = Drive, VR2 = Tone, VR3 = Level
No markings on the diodes
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Post by soulsonic »

Woah, it`s a Rat for Bass!

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Post by Dirk_Hendrik »

Could you check if R33 is really 1k? In the usual Maxon topology one can expect it to be 200 ohms ;)
Sorry. Plain out of planes.

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Bernardduur
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Post by Bernardduur »

Dirk_Hendrik wrote:Could you check if R33 is really 1k? In the usual Maxon topology one can expect it to be 200 ohms ;)
Woops; I messed two resistors up :)

I replaced the schematics!
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Post by bajaman »

Thanks Bernardduur :D
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Post by gkoerselman »

Just finished building this one from Bernardduur's schematics. If I'm not mistaken, the tone pot is 500k rev log and the drive and level are 100k log. I used 1N4148's for diodes.

Thanks Bernardduur!

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Post by Bernardduur »

gkoerselman wrote:Just finished building this one from Bernardduur's schematics. If I'm not mistaken, the tone pot is 500k rev log and the drive and level are 100k log. I used 1N4148's for diodes.

Thanks Bernardduur!

Nice!

Dunno about the pots; they were marked with a 'M' and their value.
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Post by PurplePeopleEater »

The schematics have been 404'd. Could someone PM them to me ? Thanks.

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Post by PurplePeopleEater »

A member here was kind enough to forward the schematic to me. Thanks.

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Post by gkoerselman »

I've been sick for the last week, so didn't get to follow this up sooner.

I'm not that much of an expert with electronics but I have assumed that Q5 and Q6 are the fet switches (with the rest of the switching circuit ommitted from the schematics).

I wired up the 'left' leg of the Q5 and Q6 transistors to a switch (from a schematic perspective) with as switch pole the junction of R12 and C7. This works for turning the distortion on and off. Hooking the effect up to an external true bypass switcher I can hear the effect buffer influence when off but I don't find this to be a negative (for bass).

This week I'm going to try altering my circuit to the modded version to see how that sounds.

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Post by darkglass »

Uhh, does someone else have any of the schems? Links seem to be broken.

Regards

Douglas

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Bernardduur
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Post by Bernardduur »

darkglass wrote:Uhh, does someone else have any of the schems? Links seem to be broken.

Regards

Douglas
Links are fixed!
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Post by Nikolas »

Links are dead again :(

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Post by Greg »

Nikolas wrote:Links are dead again :(
Yes they are.. somehow I missed this one too.. :cry:
I wonder if someone could send me the schematics or if the links can be fixed.
Thanks
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Bernardduur
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Post by Bernardduur »

'No more....... loud music.......'
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Post by Nikolas »

Thank you very much!!!
:thumbsup

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Bernardduur
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Post by Bernardduur »

Hmmmm, this pedal is really nice! I build it last night because I'm getting bored with my fuzz sounds on bass...... this little box gives you tight sweet sounds with a lot of bass. On 50% of the tone stack the tone is really nice and full; lower is more bass, higher is more focussed treble. Add a clean blend and voila, I'm in heaven!
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Post by abbitxuelo »

Hi, this is my fist post, but i have read the forum for some time. I have mounted some easy pedal, and i want to attenp it whit something like this, but would be pleasing to that somebody put some sample of his sound.
Would they recommend me some other pedal for interesting bass in this line?
Thanks

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Post by Güero 2.0 »

Bernardduur wrote:Hmmmm, this pedal is really nice! I build it last night because I'm getting bored with my fuzz sounds on bass...... this little box gives you tight sweet sounds with a lot of bass. On 50% of the tone stack the tone is really nice and full; lower is more bass, higher is more focussed treble. Add a clean blend and voila, I'm in heaven!

Did you use what schematic?
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