Kerry

Just realized I should have thanked Birgir as well for all of his efforts on the KGST project

On my first version I did the heater wiring off board. I wanted to get it on the board this time. I used the 4 layers so that there would be a solid ground plane under the heaters and between any signal / voltage traces. I also made sure there was some ground plane on top between the heater and servo which at worst would introduce common mode noise.

Nice! This is really interesting. I'm going to have to add it to the list.

I wanted to redo this as a single 4 layer board. The board is 111mm x 150mm. I'm pretty happy. Should have it back pretty soon and will give it a go. It supports a couple of styles of the servo for the offset so I can play a bit.

I'm just waiting to get these back. They are my shrunk down boards. The chassis is going to be 12" x 14.3" x 3.3". This will be the same as the power supply. Most everything is SMD now and I'm looking forward to stuffing this in a couple of weeks (I've got all the parts). The boards support two styles of batteries (jfet/LED or LT1021-10). Also they support both the original CSS as well as the 10m90s / DN2540 (thanks to JimL). I have to give props to Kevin and Birgir who did the original layouts. This thing is a beast with over 540 components.

Sorry, the noise being discussed was regarding the T2 batteries, not the PS boards. The last paragraph of my post was discussing the PS boards.

The noise seemed to be caused by leakage between resistors and possibly to the ground plane, though since I had lifted all resistors (PRP & Xicon) it doesn't seem like it was the ground plane. I agree that the noise was not an issue having to do with external sources. Regarding noise measurements on the PS boards, I'm using custom boards so I don't think my results will carry to the GB boards. Also, unless I screen my room, I would not likely be able to see any differences in performance unless they were fairly large (>10mV).

Happy Birthday Tom Enjoy!

I got zapped once as well by the bias supply. I've been adding a 10M resistor before the 10M90S. It will bleed it out slowly.

Another site to look at is speedymetals.com, though I don't know if they ship to Australia.

I've been following this for a while with great anticipation. Really glad it's out. Congratulations! I've already got the z1 board. I'll probably do one stock y3 and then use some of the components to do something more custom. Thanks for all of your efforts with this.

Definitely in on 20 pieces. Could do more if it helps.

Nice job! I'm curious about your impressions once you've had a bit of time with it.

Nice! What servo are you using? Also, I have SMD parts for the 5pf cap and diodes. I've also been using the SMD version of the lsk389, just in case you're looking to get rid of more through hole parts. Are those the 0603 LEDs?

Absolutely gorgeous! What treatment did you use on the top copper? I love the piping on the heat sinks

Congrats

I spent ten years learning the drums. The first eight were about precision the next two were about forgetting about being precise. My last teacher used the word cats in every sentence and always wore dark glasses. kind of like math when they teach you numbers don't exist. It's the next level and so much better.

I was just listening to someone play an acoustic guitar on a subway platform in New York. Sound production was spot on and beautiful. I just need to get more of my favorite artists down here.

happy birthday marc!

Nice work! The output accuracy is also controlled by the resistors in the voltage divider, which are only 1% for the dale/xicon. For our purposes, this is not an issue.

I placed an order with them a few months ago. it did take a few days between responses but the order was processed and delivered just fine.

Thanks. I was just watching the eclipse. Very cool.

I think the trim pot is a good place to look. I remember Inu looking at them as well as some other members needing to replace them to clean up the noise. I think Inu did a full substitution with a fixed resistor at some point. It's been a while so I don't completely remember. For me, the noise was definitely coming from the resistors. I used PRP and ended up replacing with everything in the batteries with Xicon, which did the trick. Finicky thing these batteries. Speaking of trim pots, JoaMat, what trim pots are you using in your SMD battery above. I'm just laying out my new boards and I wanted to size them properly. Given that yours worked, I thought it would be a good source. Lastly, I finally got to testing my new PS. +/-500V, +250, -300, -60, +/-12V and 5V supplies. Everything checked out. One note is that the 47nF or .1uF bypassing the resistors going into the 20K resistors and feeding the error amp seem to increase any oscillations coming from the prior stage. I've taken them out for now. I'll post something about this in the carbon thread as well, since these new supplies are used there as well. I'm seeing noise levels under 6mV, but there is likely noise coming from my room that I'm seeing. Also, I'm seeing some random spikes at around 50mV. EDIT: I'm going to try adding an EMI filter at the input to see if it cleans this up.

That's awesome. My plan was to go SMD for the amp section, including the batteries. I was thinking of putting pads for both battery styles. what FET did you use?

Yeah, I thought he would just always be there. RIP.