Noah's Ark - Distortion M

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
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SPeter
Cap Cooler
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Post by SPeter »

himister wrote:Well done bobo. :applause: May I ask what software you have used for this one?
:wink:
:applause:
!+! Nicely done!
Thanks
:D

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bobo
Breadboard Brother
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Post by bobo »

Illustrator

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gainiac
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Post by gainiac »

Two mistakes with this layout, first the 47k resistor is actually a 4k7 and the connection to pin 5 of the opamp was all screwed up. I've gone ahead and revised the pcb and "layout" (this is not my original work btw) with 2 pads so you'll just need to put a wire jumper between them. Otherwise this is verified and sounds rather nice. FYI there's a vero layout on tagboardeffects but note that the input cap is mismarked as 220n, should be 22n per the schematic.

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gainiac
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Post by gainiac »

My apologies, I missed one more change that needs to be made, luckily it's offboard so the revised layout is still correct. In order for the volume pot to work you'll need to add a wire from lug 1 connecting to ground, that's all.

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Manfred
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Post by Manfred »

I created the PCB layout without ground aera derived from the layouts of the previous posts.
The gound ground connection to the out potentiometer an the 4700pF capacitor in parallel to it have been omitted.
The capacitor can be soldered directly to the out potentiometer lugs, also the ground connection.
The clipping diodes are unmarked.
There are two versions one with the reverse polarity protection diode connected to ground
the other one with the diode in seriell.
I don't no which version is applied in the original pedal.
NoahsArcLayoutProtectDiodeGround.JPG
NoahsArcLayoutProtectDiodeGround.JPG (57.4 KiB) Viewed 400 times
NoahsArcLayoutProtectDiodeSeriell.JPG
NoahsArcLayoutProtectDiodeSeriell.JPG (57.27 KiB) Viewed 400 times
Ready to print PDF-files:
NoahsArcProtectDiodeToGroundComponentSide.pdf
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NoahsArcProtectDiodeToGroundSolderSide.pdf
(4.39 KiB) Downloaded 33 times
NoahsArcProtectDiodeSeriellComponentSide.pdf
(11.16 KiB) Downloaded 26 times
NoahsArcProtectDiodeSeriellSolderSide.pdf
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NoahsArcProtectDiodeSeriellSolderSideMirrored.pdf
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SprintLayout6-file:
NoahsArc.zip
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gainiac
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Post by gainiac »

This pedal is one of the best Marshall-in-a-box circuits I've come across, thanks for the professional looking layouts, very nice work you've done here.

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