Maybe some of the files are not part of the board fab gerbers? I identified all files I think are viewable layers... one is labeled .BAK (?)
@ first glance, the files highlighted are the ones I was looking at. Some of the files are unused layers? I will check more closely tomorrow or next day, thanks. At prototype prices, I can't rely on the PCB house stripping out unused layers, if there is anything at all in the file, like a representation of a mounting hole or a via, or ground, they will make a board with a blank layer (happened before).
Last edited:
Have you taken a look at some of the Gerber viewers in the links - also very useful for this kind of thing.
Interestingly, I can select the layers that I want to plot in the gerber export dialog box, but it still generates the unselected layers even though they are blank - i.e. no routing on them.
Anyway, any further questions, let me know.
Interestingly, I can select the layers that I want to plot in the gerber export dialog box, but it still generates the unselected layers even though they are blank - i.e. no routing on them.
Anyway, any further questions, let me know.
Last edited:
I have not had time, but I will. I am using the same free viewer I used on my layout of the through-hole VSSA version for now, and the "empty" layers do not open.
Are the Gerbers 274x?
Are there any changes from the schematic in the PDF, or the BOM?
(trying to find some time to check parts availability in the US)
Do you have any issues pairing the KSC3503D and the KSA1381E in NX amp? I ask b/c the different speeds have come up in the VSSA and PeeCeeBee threads, and because KSA1220AY / KSC2960AY has been proposed as substitute.
http://www.diyaudio.com/forums/solid-state/231662-peeceebee-70.html#post3537454
KSA3503E is still available from repair stock and such, but not in distribution, so one can still get complementary parts for a limited time (but not from Mouser or Digikey, and not for long).
http://www.diyaudio.com/forums/solid-state/231662-peeceebee-70.html#post3537454
KSA3503E is still available from repair stock and such, but not in distribution, so one can still get complementary parts for a limited time (but not from Mouser or Digikey, and not for long).
So, does the difference in hfe matter at all in this case? Are we obsessing about this in the PeeCeeBee thread for nothing
?
So, does the difference in hfe matter at all in this case? Are we obsessing about this in the PeeCeeBee thread for nothing
If you can use devices of opposite polarity with similar hFE spreads ( lower or higher within reason), that's the best thing to do. If you can only get devices where there is a big spread in hFE, I don't see that this will cause problems that will be apparent sonically. A far worse thing to do would be to use devices with high Cob. My recommendation is tha you go for it!
My goal is $10/board, $20/stereo set in small quantity. That was the cost of the boards I made for the through-hole version of VSSA. You can see pics of those in Shaan's PeeCeeBee thread. (I have not had a chance to review the psu yet, I am concentrating on the amp boards for now.)
Those were FR 4, .062” thickness, 1 ounce copper, plated holes, one side silkscreen, two-side solder mask. We also got gold-over lead finish for free, which is very convenient for manual soldering.
The nx-Amp boards boards have cutouts and SMD parts on both sides, so $10 may be optimistic.
I would like to have 2-oz copper, but that takes it out of the scope of something that can be made for a small one-time charge. I think "prototype" lots are normally aggregated, so we get a prix-fix meal, no ordering off the menu, in exchange for a professionally made board...
Please review the BOM if you get a chance, and look for any critical parts, or hard to get parts, if necessary I will make a partial kit.
Frankly, I am happy a couple other people are interested, seems like too good an offer from Bonsai to just let pass... I mean, this was obviously designed as a complete product, with manual, power supply, output protection... and you can build it for the cost of a pcb and a bag of parts... hmmmm,
, LOL!
I am only going to kit parts if some prove to be hard to get, so the default is just the board, yes.
I believe Bonsai made the BOM so all the parts can come from Mouser, but I have not reviewed that in detail. So, simplest way is if you review the list yourself, and see if something jumps out at you, enter a few of the p/n on the mouser web site, and see if there are any surprises. If you can get all the parts in one box from one distributor, then there is no reason to make kits.
