Hey everyone !
Has anyone used JLCPCB to produce the PCB panels for the rack version ?
I just did and here's what they sent me... They say there's no mistake, as the "holes" for Mic In/Line Out/DC In/Gain are not "holes" in the layout, they're part of the board outline and come as "solid" circles instead of "holes". Therefore, they cut in the middle of the outline, meaning here that the hole is half the good size.
Anyone had the same issue ? Should the Gerber be updated with holes instead of outlines ?
Cheers 🙂
Has anyone used JLCPCB to produce the PCB panels for the rack version ?
I just did and here's what they sent me... They say there's no mistake, as the "holes" for Mic In/Line Out/DC In/Gain are not "holes" in the layout, they're part of the board outline and come as "solid" circles instead of "holes". Therefore, they cut in the middle of the outline, meaning here that the hole is half the good size.
Anyone had the same issue ? Should the Gerber be updated with holes instead of outlines ?
Cheers 🙂
Attachments
Wow!
That is interesting to say the least. I used JLCPCB for both my frontpanel orders and it came back just like it should.
So they cut a hole in the middle of the outline, but where did they get the size of the hole from? Did they just make up something?
So what does the PCB look like in the preview on your JLCPCB order site?
If I look up my old order it now shows like this, so that's not right. Perhaps JLCPCB have changed their Gerber interpreter script or something.
When I view it in KiCad 3D it still looks good.
So yes, perhaps the solid circles need to change to just circles with outlines on the edge-cut layer. I will give it a try.
I still think JLCPCB delivered you something other than what their preview shows though.
That is interesting to say the least. I used JLCPCB for both my frontpanel orders and it came back just like it should.
So they cut a hole in the middle of the outline, but where did they get the size of the hole from? Did they just make up something?
So what does the PCB look like in the preview on your JLCPCB order site?
If I look up my old order it now shows like this, so that's not right. Perhaps JLCPCB have changed their Gerber interpreter script or something.
When I view it in KiCad 3D it still looks good.
So yes, perhaps the solid circles need to change to just circles with outlines on the edge-cut layer. I will give it a try.
I still think JLCPCB delivered you something other than what their preview shows though.
Ok, changing to outline instead of solid fill on the edge cut layer does make it look correct in JLCPCBs 3D preview.
So I did that change and pushed it to Github now.
So I did that change and pushed it to Github now.
Hi, OJG.
Thank you for sharing! I successfully replicated your ThatMicPre project and made a few minor modifications:
1. Slightly reduced the width of the mainboard to fit aluminum cases available on China's Taobao.
2. Adjusted the panel layout height and the positions and sizes of the mounting holes to match the aluminum cases on Taobao.
For those interested, you can check out my fork.
I also replaced the NC3MBH1 with the NCJ6FA-H, which is compatible with both 6.35mm TRS and XLR connectors. However, I haven’t fabricated or tested the new mainboard. Anyone interested can fabricate it directly; I believe the design should work without issues.
During the process, I used That1512 and SSM2019 chips purchased from Taobao, but neither produced an output. Finally, I bought a second-hand AD620 from Taobao for just $0.6, with free shipping, and it worked as expected.
I hope my experience can help others avoid unnecessary trouble.
(I am not good at English, and all of this was translated using ChatGPT.)
Thank you for sharing! I successfully replicated your ThatMicPre project and made a few minor modifications:
1. Slightly reduced the width of the mainboard to fit aluminum cases available on China's Taobao.
2. Adjusted the panel layout height and the positions and sizes of the mounting holes to match the aluminum cases on Taobao.
For those interested, you can check out my fork.
I also replaced the NC3MBH1 with the NCJ6FA-H, which is compatible with both 6.35mm TRS and XLR connectors. However, I haven’t fabricated or tested the new mainboard. Anyone interested can fabricate it directly; I believe the design should work without issues.
During the process, I used That1512 and SSM2019 chips purchased from Taobao, but neither produced an output. Finally, I bought a second-hand AD620 from Taobao for just $0.6, with free shipping, and it worked as expected.
I hope my experience can help others avoid unnecessary trouble.
(I am not good at English, and all of this was translated using ChatGPT.)
Hi!
Thank you for sharing, and for contributing with a public fork!
But did you forget to push your changes to the fork? I can't see your commits there.
Also please remove the signature "OJG 2023" in the readme.md in your fork, once a project is forked I can't sign it or vouch for it's correctness anymore.
OJG
Thank you for sharing, and for contributing with a public fork!
But did you forget to push your changes to the fork? I can't see your commits there.
Also please remove the signature "OJG 2023" in the readme.md in your fork, once a project is forked I can't sign it or vouch for it's correctness anymore.
OJG
I recently purchased boards for the rack-mount version from JLCPCB. I downloaded the files before this recent discussion and upload of updated PCB files for the holes on the rack panels. The boards came Monday, and, interestingly, they look correct. I'm excited about this project!
Also, the current version of the rack-mount schematic on Github doesn't load in the latest version of KiCAD: it gives a "Maximum line length exceeded" error.
JCS
Also, the current version of the rack-mount schematic on Github doesn't load in the latest version of KiCAD: it gives a "Maximum line length exceeded" error.
JCS
I just modified the footprints for 1/2W and 1W resistors. Previously, the 1/4W footprint which didn’t fit at all and required the resistors to be mounted vertically.
Hey there 
Super thrilled to have come across this thread!! As a full-time studio singer and vocal producer, it has been a dream of mine to build my own mic preamp as a fun, creative DIY project! Your project is EXACTLY what I have been looking for as a semi-intermediate builder (I've built a handful of effects pedals, mostly from kits, but have just started designing pcbs in Eagle.)
Currently in the sourcing parts, designing and drafting stage, I am sure this forum and thread will be incredibly helpful along the way, and I am already looking forward to posting the result once it's done!
Thank you SO very much for all this phenomenal work and effort! @ojg 🙌🏻
-Stef
Super thrilled to have come across this thread!! As a full-time studio singer and vocal producer, it has been a dream of mine to build my own mic preamp as a fun, creative DIY project! Your project is EXACTLY what I have been looking for as a semi-intermediate builder (I've built a handful of effects pedals, mostly from kits, but have just started designing pcbs in Eagle.) Currently in the sourcing parts, designing and drafting stage, I am sure this forum and thread will be incredibly helpful along the way, and I am already looking forward to posting the result once it's done!
Thank you SO very much for all this phenomenal work and effort! @ojg 🙌🏻
-Stef