Hey kt, email me your address. ikoflexer [at] gmail.com
Well, the pcb people replied. They will not print a few boards for free or at the same price as though we'd produce a large number.
I'll keep my end of the bargain. Will send an order for 275 positive and 175 negative and pay for it. When they arrive I'll send boards to salas, stormsonic, keantoken, celar, and one more volunteer. It would be nice to get somebody experienced. Hopefully soon after they will report back their impression. Then, who wants to get the boards and/or parts can do so.
Well, the pcb people replied. They will not print a few boards for free or at the same price as though we'd produce a large number.
I'll keep my end of the bargain. Will send an order for 275 positive and 175 negative and pay for it. When they arrive I'll send boards to salas, stormsonic, keantoken, celar, and one more volunteer. It would be nice to get somebody experienced. Hopefully soon after they will report back their impression. Then, who wants to get the boards and/or parts can do so.
I have used 100% silver stuff in the past and never liked it. I have silver/gold cables and they are the best i have tried.
My opinion is that materials (metals etc) matters A LOT. Silver needs some other metal to shine, such as gold, palladium or platinum. Could you pm me this pcb manufacturer?
One of my reference amps, the ASR Emitter does gold-plate PCBs (or is all gold i dont remember) since 2007, that's reason enough for me to want the same in a cost-no-object design.
After everything else (little things like CIRCUITS) have been optimized 😉
I don't do gold plated over silver, I mind the silver do not need nothing to shine (possible will be contrary), I prefer copper/silver plated or only silver😉
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If you want to help you I can pay mine pcb boards now, if you need more money to support you let me know?
I will prefer pay by Paypal, it's possible?
Waht about the price for semis BOM?
No, it is too much to bear, Iko.
I think little improvements can be done manually on the produced boards, if needed.
Uh? I remember one had, but maybe i'm wrong.
No ebay, they take almost 10%. Better to donate to diyaudio than to enrich them. Ebay is good only to advertise yourself.
Well iko
I think you agree , there is a man , who meet your reqiurements , and he is located also in Canada
But I don't know i he would be interested to make such tests for DIY community
I'm talking of course about Mr Ovidu (syn08)
**. www.barebonespcb.com will do 5pcs. 3" x 2" boards double sided (no solder mask and no legend) for $65. Shipping an envelope in the US is rather cheap, even by courier, and no taxes to pay if outside the state of Colorado. Grand total maybe $80 and you get the boards in less than 48 hours, at your doorstep.
Hi merlin, thanks for the offer. No need to pay now, I can cover it all for the moment. BTW, everybody, lease have a look from time to time at the GB page, I will post there new info. $7 for a bag of actives to build one regulator. I'll add another list for people who would like to get those, so I can prepare accordingly.
Yes indeed, he's probably best equipped to runs tests. Unfortunately I'm on his ignore list. 🙁
iko
Two posts elier Mr Ovidu suggested (without being asked) the company , which could make tests PCB quickly and for much less $$$.
So I would say this thread is somehow in the range of Mr Ovidu's interest.
I don't know how others members ,but I would be ready to pay samall additional fee (calculated per board f.e.) just tu be sure , the circut and layout were tested by some EE with usage high quality stuff.
Seem not money reason😡but if it's money reason I would ready also to pay small additional fee🙂
Hi Telstar,
I would like to clarify something. These three issues are all different:
1) test the design/circuit
2) test the pcb layout
3) test the manufactured pcb
1) This tries to establish whether the circuit itself works up to the desired specifications. I know it's too much to read, tons of pages, but we have been doing a lot towards this goal. Not only simulations, but built several actual prototypes. Measured noise and line rejection to the best of my ability. Compared with other regulators that I built (other designs). Stormsonic has also done some tests. Hifinutnut also built the design and has done some of his tests. I would have loved to send a built regulator to syn08 or Jan Didden to test, because these two guys have both the tools and the skills to run proper tests. syn08 has me on his ignore list. Jan Didden has shown absolutely no interest in this regulator. In any case, the design has been tested for stability by more than one person, has also been tested for normal functionality, and measured to some extent. The only thing we lack are state of the art measurements.
2) I have etched pcbs myself, manually, to test the layout design. Built several, they all worked.
3) The purpose of this test is only to check that the pcb manufacturer has done a good job. I do understand though that many members would feel much better to see the design tested again at this point. But I expect no design changes at this point.
If people have trust issues with the design then we should not do a group buy. I'm serious. We should stop the GB or delay it, and wait until people are happy with whatever measurements and tests.
No, sorry, you're not wrong. I misunderstood what keantoken said. At some point he said that his scope has internal noise of 10uV, and that would not compete with my 100uV/cm scope. However, his 3a9 diff amp module has 10uV/div as the most sensitive setting, and that is better than my 100uV/cm. This being said, I truly do not believe that many of us will achieve lower noise than 20-30uV peak-to-peak ripple. It's just my opinion after doing a lot of these and my own measurements.
I would like to clarify something. These three issues are all different:
1) test the design/circuit
2) test the pcb layout
3) test the manufactured pcb
1) This tries to establish whether the circuit itself works up to the desired specifications. I know it's too much to read, tons of pages, but we have been doing a lot towards this goal. Not only simulations, but built several actual prototypes. Measured noise and line rejection to the best of my ability. Compared with other regulators that I built (other designs). Stormsonic has also done some tests. Hifinutnut also built the design and has done some of his tests. I would have loved to send a built regulator to syn08 or Jan Didden to test, because these two guys have both the tools and the skills to run proper tests. syn08 has me on his ignore list. Jan Didden has shown absolutely no interest in this regulator. In any case, the design has been tested for stability by more than one person, has also been tested for normal functionality, and measured to some extent. The only thing we lack are state of the art measurements.
2) I have etched pcbs myself, manually, to test the layout design. Built several, they all worked.
3) The purpose of this test is only to check that the pcb manufacturer has done a good job. I do understand though that many members would feel much better to see the design tested again at this point. But I expect no design changes at this point.
If people have trust issues with the design then we should not do a group buy. I'm serious. We should stop the GB or delay it, and wait until people are happy with whatever measurements and tests.
No, sorry, you're not wrong. I misunderstood what keantoken said. At some point he said that his scope has internal noise of 10uV, and that would not compete with my 100uV/cm scope. However, his 3a9 diff amp module has 10uV/div as the most sensitive setting, and that is better than my 100uV/cm. This being said, I truly do not believe that many of us will achieve lower noise than 20-30uV peak-to-peak ripple. It's just my opinion after doing a lot of these and my own measurements.
Hi ikoflexer,
i know the perfect work of my pcb manufacurer, so why don´t you try him?
others should probably just ignore this post as the first section is OT, but its related, so perhaps the PCB house ilnk will be of some use to those interested in this thread. at least I hope so
in cables at audio frequencies I may agree with you, although I tend to prefer all silver or all copper rather than plated conductors (amorphous alloys are interesting though). but in high frequency circuit design the skin effect is a very real factor (at audio frequencies it is nothing but a marketing ploy) so I would stick to one lot of immersion and that is it; I doubt very much the guy had all gold traces LOL, although I do know of some company that made the entire circuit from pure silver with a CNC milling machine 😀. gold plate is very common and silver immersion is not hard to find either TBH, I came up with several more with a simple google search when I was looking, but these guys who were recommended to me at lintek have it all!! they even do the CNC stuff if you have the budget, dont know if they could do it silver though, but they have PTFE PCB, copper backed, silver and gold immersion, silver and gold soft or hard electroplate insane low tolerances. and i'm with you, i'm using this guys above for my I/V stage of my ackodac and after I have tested out the first release I will get the dacx board done with this process too, I would like any tweaks I make to be incorporated into my build for my version of the dac (not a redesign, I dont have the skills for that yet) the idea of having a device where nobody can ever say to me that there is no point to the cables because the traces are crappy thin copper 😉 of course the chips themselves are still a stumbling block
anyway enough of that, sorry for the OT, back to the regularly scheduled program.
ikoflexer, are you sure about this? thats a bit of money to put up for no benefit to you; let me know when you are going to do it and I will poay ahead of time, I dont feel right about that; you have already given up some serious time to get this design ready for us, I dont feel right about you putting up all the money out of your own pocket as well.
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Who is it? Send me email with their website or contact address please.
The pcb manufacturer that I wanted to use has excellent reviews for the quality. I don't actually have any doubts, but I think other people have more doubts about the design than the pcb 🙂 The tests of the volunteers, I think, would help people trust the design more.
We should probably wait some more with the GB until people are satisfied with the performance. I have no problem waiting, I've built my own already, I have no need of pcbs.
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