Icarium

Nod. Well personally I may get them anyways... I'm undecided. It's just an option for people who knows they will be using more heavy duty heatsinking and would like to save a few extra bucks a board. Need to gather the infos!

Okay I think I have enough information to pin down the group buy for sigma22 kits. So please let me know if you want kits or if you do no want kits! If you want kits then read further! I've talked to luvdunhill and he says that onboard heat sinking is probably not sufficient for 4 board builds and Jeff from glass jar has agreed he can omit them for a savings of another 6-8 dollars per kit. He says if we know a particular type of heat sink he can try and order those for us. I don't know if any on board heatsinks can possibly be sufficient, but maybe a DIYer in the know can recommend something. Other options are upgraded Muse caps for the sigma22.. he says he feels these are not necessary so generally doesn't go with them, but they are availalbe if people want that. Also he can do pretty nearly any sort of LED colors if people want whatever colors for that. So within a week I'd like to pin down how many kits each person/group wants and what options they want and the address they'd like it mailed to. Options are: 1. Onboard heatsinks (Yes/No/Special order?) 2. LED colors 3. Upgraded Muse caps (Yes/No) Non dynafet people are of course welcome to request kits as well. Team dreadhead and team Spain will probably want their stuff mailed to one address so just providing me with that address is enough. After I get all that info I will get precise quotes from him and then we figure out payment.. either you to me and me to him or you to him directly. The latter may be too confusing from his perspective so.. I'll work that out with him in the mean time. I'd like to get these kits delivered within a month. 1 week to pin down addresses/configs. 2 weeks to get payment sorted out and kits shipped and another week for them to arrive. Thanks! P.S. PMing me info is probably the best.

Fri - Monday would be ideal for me. I would like to have my travel plans solidified by end of March latest if at all possible. If we can't get a decent enough headcount then I may just ride down with Min and plan around that.

I don't know myself.. unfortunately I don't think anyone really knows unless we get some prototypes made.

Sure Deepak. I'll add you in after lunch.

So Spain is interested in 6 kits then? When will we pin down what output voltages we need or is that more of an individual decision?

Yeah I dunno it's going to be pretty hard I think Filburt mentioned that these chips are calibrated through trimming via resistors on the board so even if you can locate replacement chips they won't be a simple swap in replacement you'd have to do some fancy calibration which would require equipment along the lines of a Prism analyser, but more likely something like what Audio Precision or SRS makes and know how to use that equipment to do a good job of it. Also there were 3 versions of the chip made. 1 with internal I/V. Then the A series which came with internal I/V or no internal I/V (Spectral and I believe the processor 3 use these). Anyways.. I highly suggest you try and get your money back.

Yeah he wanted 2 spare boards... just boards though I think.

Yeah I am in talks with glass jar audio. He said it'd be ~67 dollars a kit without toroids and he might be able to give us an additional 15 percent off for a bulk order and is willing to handle shipping to people provided we give him a list. If you wanna post the spreadsheet that'd be $$. I was going to do it after work tonight, but yeah that's in another ~8-10 hrs or so The only logistics question is that his kits are tailored to very specific toroids with certain VA values.. if we want to things like run 2 boards off a big transformer or values not in sync with what he normally kits for.. do we need additional parts? If so what type? I imagine even if we need to buy some parts separately it will make going with glass jar audio worth it since his prices are so insanely low.

Happy Birthday Sir! Hopefully the investiture of your newfound age-blessed powers goes smoothly without a bump.

I second this. Chris Johnson who was the man behind Parts Connection/Connexion and Sonic Frontiers would know best about the serviceability of this DAC. He very well may have ultra analog chips still lying around to service this and the other dacs that used this chip that Sonic Frontiers produced.

Yeah that's the primary use case. Okay I heard from you all about transistors. Dynafet Group Order - Google Docs <- This spreadsheet represents how many boards you each want and how many sets on transistors you want (In the scale of boards worth like 4 boards worth or 2 boards worth etc). If anyone notes any inaccuracy here please let me or luvdunhill or post here asap! Thanks for your cooperation and hopefully the ball starts rolling soon It's looking like we need 62 boards worth at the cost of 60 dollars per board I believe.

That sucks.

K then that's that on Sowters for the US/Canadian bunch. Just waiting on the Spanish krew and then that group buy can go down whenever whoever is in charge is ready to coordinate the order.

Are you speaking for Torpedo and Hitoridekimasu as well? You have some time to decide for sure. It really depends on when luvdunhill wants to make the order or whoever is in charge of that. I'm guessing within a month? I don't know for sure. Just as soon we you form a concrete decision let me know

My understanding is that he is going to make the board very modular/scalable in that you can mostly just populate for whichever features you want.

Thanks

I think these transformers are pretty small.

Hrm if I call Hilton to book can I bypass the June 1st online booking issue?

Ha well if its cost effective for them to join with us... then I need to know if your team needs any Torpedo.

Everyone's confirmed besides PFKMan. I'll mention the Thursday deadline to him. Looks like we have everybody I'd expect to be in for Sowter transformers except for Digipete, looser01 and PFKMan. (I know Pars isn't interested. Also guessing Kevin Gilmore/Nate Maher are not interested). Btw, luvdunhill since you have more group buy experience than me.. generally does the buy organizer have to distribute? Do you think we could include the Spanish guys and have Sowter ship direct to them? I don't know their interest though either way I guess.

I have a very very big desk. I currently have my m-audios on stacks of books to get em to ear-level.

Hrmm... how would those work out if I tried to use them as computer speakers on my desk?

Hrm.. wait now I'm confused you talk about oversampling/upsampling in a somewhat interchangeable fashion. Also could you elaborate what you meant in your earlier post with regards to improvement in "the quality of the outputs"?

Hrm I don't know what there is to elaborate on I've heard it cullen 3 modded and stock and both sound good for a current production DAC in that particular price range. I don't know if there's anything particularly stand out about either, but they didn't really do anything wrong either. Nice even across the range with a decent sound stage and a good amount of clarity and detail. I didn't listen to them side by side, but I don't really remember a night/day difference between the modded and stock one.