Is my layout correct? (Yamaha NE-1)

[gitarkatili]

Hi all! I recently stumbled upon a pedal named Yamaha NE-1 Parametric EQ, and watching the demos of it I quite liked the sound and the utility. I wanted to use this pedal as a preamp and looked it up online for schematics, found one. Thanks to a guy named Paul, he made some schematics and in his blog, there even is a stripboard layout. Where I live, there are no places selling stripboards but perfboards.

I am trying to copy it to perfboard. Can you check my DIYLC project?
Original schematics here > https://paulinthelab.blogspot.com/2013/02/yamaha-ne-1-bass-parametric-eq-preamp.html
My DIYLC files and picture of it. > https://drive.google.com/drive/folders/1lYPgp2Ge6xRmaHdGUXXDwupCOgl7IfYy?usp=drive_link

Thank you so much!

[ElectricDruid]

I'd watch out for that comment under the PaulInTheLab article suggesting that the two pot sections should move together, rather than in opposition to each other. Together makes more sense to me, but that's not how it's shown on the PaulInThe Lab schematic, and I don't think on your layout either. If something's weird, that's the first hing I'd change.

HTH

[antonis]

Hi & Welcome..

I think it should be better to retain electro caps and 1μF NP original pin spacing 'cause you spoil stripboard's major advandage..

[Rob Strand]

I'd watch out for that comment under the PaulInTheLab article suggesting that the two pot sections should move together, rather than in opposition to each other. Together makes more sense to me, but that's not how it's shown on the PaulInThe Lab schematic, and I don't think on your layout either. If something's weird, that's the first hing I'd change.

Yes, the wiring pic of the pot looks wrong to me too.

Both pot gangs should have shorting links on pins 1 (ccw) and 2 (wiper).
The two pin 3's (cw) are connected together at the center.
The two 1+2 connections go to the 1k resistors.

[bluelagoon]

Here's some more NE-1 Circuit Detail -

https://untrue.ch/test/ne-1/

https://www.diystompboxes.com/smfforum/index.php?topic=125324.0

https://www.annabellekhoo.com/2021/10/29/rothwell-love-squeeze-ne-1-simulation/

https://rullywow.com/wp-content/uploads/2015/05/Canned-Yam-Build-Doc-rev1B-PDF-FINAL.pdf

https://rullywow.com/product/cannedyam/

[Rob Strand]

Here's some more NE-1 Circuit Detail -

This one has the correct wiring for the frequency pot in pictorial form, view is from rear of pot,

https://untrue.ch/test/ne-1/

R6 and R7 are each wired to two pins of the frequency pot, the center leg and the right most leg (pin1, ccw), are shorted by passing the resistor lead through both pot pins.   For a PCB where those 1k resistors are on the PCB the frequency pot leads can be shorted with a wire.   There should be three bare wires on the pot which connect between pairs of pot pins.