pddjsteve
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I'm also very happy with the Elna Silmic II from digikey.
Alien DAC v1.1 Construction Thread
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MisterX
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Quote:
Me to... in fact I preferred them over the Black Gates NX caps.
However the Black Gates FK series are another matter.
| Originally Posted by pddjsteve /img/forum/go_quote.gif I'm also very happy with the Elna Silmic II from digikey. |
Me to... in fact I preferred them over the Black Gates NX caps.
However the Black Gates FK series are another matter.
Whitebread
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Guys, is it still possible to get boards for this DAC?
AndrewFischer
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The final group buy is over. Alf said he will not be doing another. Someone here may have a spare board they are not going to use. Both of mine are built up.
You could have short run of boards made. I don't know if Alf will give out his gerber files for free.
You could have short run of boards made. I don't know if Alf will give out his gerber files for free.
Whitebread
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Well, I don't need any more than one board and I figure getting one made would cost a pretty penney. I will look around here and see if anyone has a spare board, but I think going with a different DIY kit would be a better idea.
AndrewFischer
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BatchPCB charges $10 + $2.50/sq. inch. This is a tiny board. have to double check that this meets their design rules.
| Originally Posted by Whitebread /img/forum/go_quote.gif Well, I don't need any more than one board and I figure getting one made would cost a pretty penney. I will look around here and see if anyone has a spare board, but I think going with a different DIY kit would be a better idea. |
BatchPCB charges $10 + $2.50/sq. inch. This is a tiny board. have to double check that this meets their design rules.
Whitebread
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O, thats nothing, if I cna get the drawings for the PCB, then I'll just go ahead with this.
splaz
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PM Alf, he seems like a nice enough guy doing all those group buys for us.
If he won't just give them out maybe ask if he'll submit them for you and you'll make it worth his while.
If he won't just give them out maybe ask if he'll submit them for you and you'll make it worth his while.
FallenAngel
Headphoneus Supremus
Just a sanity check here:
With the CL/CR values recommended so high and a little enlightenment recently, I'm thinking of putting the pair of 0.33uF Mundorf MCap ZN caps that I have lying around as the output caps of this thing. All of my home based amps are using either 50K or 100K Alps Blue pots, only a couple of portables use 10K pots so I'll use the 50K value.
That would make the corner frequency formula at
f = 1/(2 * π * 50000 * 0.00000033) = 9.6Hz
If there's nothing wrong with that calculation, I'm on the way to making a new AlienDac for myself
With the CL/CR values recommended so high and a little enlightenment recently, I'm thinking of putting the pair of 0.33uF Mundorf MCap ZN caps that I have lying around as the output caps of this thing. All of my home based amps are using either 50K or 100K Alps Blue pots, only a couple of portables use 10K pots so I'll use the 50K value.
That would make the corner frequency formula at
f = 1/(2 * π * 50000 * 0.00000033) = 9.6Hz
If there's nothing wrong with that calculation, I'm on the way to making a new AlienDac for myself
Gross
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Quote:
That works with my math. Just remember that though when you use it with your portable and wonder why there is nothing below 50hz
| Originally Posted by FallenAngel /img/forum/go_quote.gif Just a sanity check here: With the CL/CR values recommended so high and a little enlightenment recently, I'm thinking of putting the pair of 0.33uF Mundorf MCap ZN caps that I have lying around as the output caps of this thing. All of my home based amps are using either 50K or 100K Alps Blue pots, only a couple of portables use 10K pots so I'll use the 50K value. That would make the corner frequency formula at f = 1/(2 * π * 50000 * 0.00000033) = 9.6Hz If there's nothing wrong with that calculation, I'm on the way to making a new AlienDac for myself
|
That works with my math. Just remember that though when you use it with your portable and wonder why there is nothing below 50hz
AndrewFischer
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I've had a couple of PM requests for my BOM
It is very close to what others posted in this thread. I made a few changes.
I used an Alternate part for C1. Its on the BOM.
Not on the BOM are the Elna RFS-25V220ME3 caps I used for CR and CL. Digikey part number is 604-1051. They are really not bad, but output caps are a hot topic. I'm sure many people just won't be satisfied with a nine cent part.
C13,23,33 are are 330µF Panasonic FM. Maybe Elna RFS would sound better here. You'd have to live with 22µF though. If I was building a third DAC, I'd give them a try on the Analog side of the DAC.
I recommend getting extras of all the 0805 parts.
It is very close to what others posted in this thread. I made a few changes.
I used an Alternate part for C1. Its on the BOM.
Not on the BOM are the Elna RFS-25V220ME3 caps I used for CR and CL. Digikey part number is 604-1051. They are really not bad, but output caps are a hot topic. I'm sure many people just won't be satisfied with a nine cent part.
C13,23,33 are are 330µF Panasonic FM. Maybe Elna RFS would sound better here. You'd have to live with 22µF though. If I was building a third DAC, I'd give them a try on the Analog side of the DAC.
I recommend getting extras of all the 0805 parts.
splaz
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Quote:
or don't drop them on the floor....
| Originally Posted by AndrewFischer /img/forum/go_quote.gif I recommend getting extras of all the 0805 parts. |
or don't drop them on the floor....
FallenAngel
Headphoneus Supremus
Well, it seems those output cap values are definitely a little higher than necessary. I'm now using 0.33uF Mundorf MCap ZN's in mine and it sounds fabulous. Pics in the signature
Yen
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Quote:
Umm, can you compare with electrolytics?
| Originally Posted by FallenAngel /img/forum/go_quote.gif Well, it seems those output cap values are definitely a little higher than necessary. I'm now using 0.33uF Mundorf MCap ZN's in mine and it sounds fabulous. Pics in the signature
|
Umm, can you compare with electrolytics?
FallenAngel
Headphoneus Supremus
Quote:
Not really, lets just say that even though the BlackGate NX-HiQ sound nice and warm, there really is no comparison in quality. These blow them out of the water.
| Originally Posted by Yen /img/forum/go_quote.gif Umm, can you compare with electrolytics? |
Not really, lets just say that even though the BlackGate NX-HiQ sound nice and warm, there really is no comparison in quality. These blow them out of the water.
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