BOSS schematics  [schematic]

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

I cant download :oops:

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NickS
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Post by NickS »

Excellent, thanks, includes the CH1 (T) non-BBD chorus!

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dtjesus
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Post by dtjesus »

Has anybody downloaded these schemes? I am only after the schematic for Boss ME-50. The .rar file is 75mb and too big to be downloaded as i have limited bandwidth.
If anybody could email it across to me that would be great.
Thanks

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SPeter
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Post by SPeter »

And what is your Email address......?
People for sure should know it to help you!
:secret: ?

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dtjesus
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Post by dtjesus »

dtjesus wrote:Has anybody downloaded these schemes? I am only after the schematic for Boss ME-50. The .rar file is 75mb and too big to be downloaded as i have limited bandwidth.
If anybody could email it across to me that would be great.
Thanks
Sorry its dingalong@hotmail.co.uk :mrgreen:

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mozwell
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Post by mozwell »

lots of Boss sch from this rar file at
http://fileshare.eshop.bg/equipment_mfg/Boss_5.html
including ME50 pdf :D

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mictester
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Post by mictester »

NickS wrote:Excellent, thanks, includes the CH1 (T) non-BBD chorus!
Err... No. If you look at the circuit, it has a MN3007 BBD clocked by a 3101.
"Why is it humming?" "Because it doesn't know the words!"

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Post by KikoBass »

And how about the Boss PQ-3B schematic?

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Post by JimiB »

Anyone have a DD-20 schematic?

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Post by NickS »

mictester wrote:
NickS wrote:Excellent, thanks, includes the CH1 (T) non-BBD chorus!
Err... No. If you look at the circuit, it has a MN3007 BBD clocked by a 3101.
Err... No. If you look at the circuit, it has an ES56028S.

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mictester
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Post by mictester »

NickS wrote:
mictester wrote:
NickS wrote:Excellent, thanks, includes the CH1 (T) non-BBD chorus!
Err... No. If you look at the circuit, it has a MN3007 BBD clocked by a 3101.
Err... No. If you look at the circuit, it has an ES56028S.
Ohh - yes. However, the ES56028S (which appears to be made of unobtainium) is just a digital delay line and clock being underused to replace the BBDs which are now more expensive than the whole of the rest of the components (including the controls, sockets and box). I had two of these ICs as samples, and was rather underwhelmed. Their dynamic range is poor, and they have some nasty distortion that no amount of tweaking will get rid of!

If you want to do a nice, lush chorus, use a couple of delay lines, separately clocked (to get that "through zero" effect), some good low pass filtering and some noise reduction circuitry (compress on the way in, and expand on the way out - also helps mitigate the dynamic range issue with the BBDs). Properly set up, it sounds truly amazing!
"Why is it humming?" "Because it doesn't know the words!"

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NickS
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Post by NickS »

mictester wrote:Ohh - yes. However, the ES56028S (which appears to be made of unobtainium) is just a digital delay line and clock being underused to replace the BBDs which are now more expensive than the whole of the rest of the components (including the controls, sockets and box). I had two of these ICs as samples, and was rather underwhelmed. Their dynamic range is poor, and they have some nasty distortion that no amount of tweaking will get rid of!

If you want to do a nice, lush chorus, use a couple of delay lines, separately clocked (to get that "through zero" effect), some good low pass filtering and some noise reduction circuitry (compress on the way in, and expand on the way out - also helps mitigate the dynamic range issue with the BBDs). Properly set up, it sounds truly amazing!
Sounds like good advice. However, I wanted the CH1(T) schematic for a repair; it's now my gigging chorus pedal :)

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toneman
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Post by toneman »

thanks for the upload.
only took about 2min for the 75M download with comcast.
the Aw3 was fast and easy also.
thanks to all those FSB uploaders
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Koobenhoff
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Post by Koobenhoff »

Getting a broken link myself. I even dropped the "Edit" at the end.

I was looking for the Boss DD-3. Wanted to make some tweaks for a buddy. Hope I can get my eyes on it soon!

Koob

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Post by Rockhound252 »

Hello!! Has anyone the stripboard for Boss FA-1 FEt Preamplifier? Thanks a lot

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Nocentelli
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Post by Nocentelli »

I've not seen a veroboard version, but there's a workalike pcb version here:

http://ustomp.com/files/fa1buildetch.pdf

Doesn't look like it would be that tricky to convert to vero.
modman wrote: Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...

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roseblood11
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Post by roseblood11 »

that layout has a minor error: Use a simple 0.47µF film cap instead of a "non polar 47µF".
He simply misread the schematic, there's an almost invisible dot before the "47"

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Duckman
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Post by Duckman »

Could someone find a nice schematic for this one?
I see a potential market for a project of this nature :lol:
Attachments
boss TS1.jpg

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