grounded grid

[Shawn]

8 hours ago, Pars said:

Very nice! Is that aluminum? I wish I had a CNC. What machine do you have?

Yes. The machine is from Snapmaker, and I am planning to get the Langmuir.

Links here.

https://www.snapmaker.com/en-US

https://www.langmuirsystems.com/mr1

[Shawn]

Three weeks later, here is the outcome.

A single enclosure all-in-one with GRHV and GRLV with high voltage and heater soft-start.

The 10M90S is attached to the side wall, and thanks to the large size of the metal, the temp is about 104℉(40 ℃) after 1 hour.

The only thing is I made the mistake of the main soft start module(the one on the power outlet), which makes it only functional when you use the back power switch. In this way, I keep the front power switch on all the time to avoid the ripple current.

Still have a huge room to be improved. Planning to add a DC power supply for the heater for the DHT version, as well as the flashing soft start indicator.

[Zhang]

On 4/18/2025 at 9:58 AM, Shawn said:

a friend of mine is planing to build a similar amp but cannot find the pcb files for the pcb in center
can you please link those?

[JoaMat]

Check this link - lots of good stuff. There you find gg.zip .

[Zhang]

8 hours ago, JoaMat said:

Check this link - lots of good stuff. There you find gg.zip .

Thank you. My friend is very grateful.
He says he cannot see the center board to be found? He also says that the boards attached to heatsink is also not found?

[JoaMat]

You won’t find them boards at Kevin’s library. Custom made.

[Shawn]

In the past few months, I haven’t been idle. Besides finishing a T2 Mini, I also continued to refine the GG chassis design.

Through these experiences learning 3D design, I decided to completely re-draw the CAD files and hand them to a professional factory for prototyping (yes, I don’t believe a hobbyist garage CNC can really handle this job☹️).

Below are some photos of the sample unit. This time the chassis is fully CNC-machined, which is why you can see the extremely thick panels and the more complex geometric structures compared to earlier versions.

The side heatsinks are not separate parts. They are directly CNC machined into the chassis walls.
At the same time, the bottom cover is split into two independent left and right plates, each with a grid-style cutout design. You can remove only one side of the bottom cover to do testing or adjustments without disturbing the entire chassis. The grid pattern reduces weight while maintaining mechanical strength, and it also improves ventilation inside the chassis.

More updates will follow soon.

[JoaMat]

Fascinating chassis work.

 

25 minutes ago, Shawn said:

 

 

 

 

 

How about the scale of the altimeter? Small pointer one lap 1200 feet, two laps 2400 feet?

[Shawn]

27 minutes ago, JoaMat said:

How about the scale of the altimeter? Small pointer one lap 1200 feet, two laps 2400 feet?

I’m up here at 12,000 feet, eating a bagel while tweaking my amp. Altimeter says it’s all good.🤞

And you know what, if you’re interested, I actually have an upcoming spare CNC chassis set (one PSU case and one amp case). I’d be more than happy to send it your way just for fun, freely. Let me know your thoughts.

[G600]

Ouch, what a state of the art chassis!

Lamborghini-class, congrats!

[simmconn]

I guess the machine shop cheaped out and didn’t use 5-axis tool paths for those steep facets. Otherwise we wouldn’t see the tool marks after heavy sandblasting. This should really have been a cast part. No objections from the environmentalists from the other side of the pond? I’m surprised.

[Shawn]

35 minutes ago, simmconn said:

I guess the machine shop cheaped out and didn’t use 5-axis tool paths for those steep facets. Otherwise we wouldn’t see the tool marks after heavy sandblasting. This should really have been a cast part. No objections from the environmentalists from the other side of the pond? I’m surprised.

Yes, I noticed that too. But I found those machining marks only on the inner rear panel, left and right sides. The rest of the chassis looks clean.

I’m pretty sure they just used 3-axis machining, which is still miles better than what I could do on my home-garage CNC. Of course, 5-axis is another story, and I’ve been thinking about designing some more complex curved surfaces where 5-axis paths would actually make sense.

Overall though, I’m quite happy with how this chassis turned out. I haven’t yet checked all the PCB mounting hole positions against the boards, but so far it looks promising.