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y1 gamma-1 DAC - Page 10

post #136 of 1535
12/15/08 at 6:14pm
I tried comparing the USB input to the optical input, via a bunch of the stuff you see in my sig. I couldn't really pickup on any difference. They both sound fantastic I'm happy using the USB input.
Though if you insist, if you look at the schematics, you'd see that technically, it wouldn't be too hard to adapt another optical in. Either in place of the coax, or in addition(RXP3). Just look at how U7D is connected to RXP2 on U2D. RXP(x) is selected with TXSEL. It would be a little trickier mounting it all properly, but if you've come far enough to be able to make that mod electrically, you're likely able to figure out the rest
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post #137 of 1535
12/15/08 at 6:42pm
Quote:
Originally Posted by Listen2this1 View Post
So the ones that have done an order from mouser, what were your totals.
I have $70 Mouser(including Hammond case) and $14 Digikey(including PCM2707), with only just a few extras for other projects. Prices do not include shipping.


Quote:
Also AMB ealier you said that if I would need to build two different power supplies if I wanted to run the Mini3 and the y1 off of the same wallwart. What if I know that I will be using a 15v power supply, could I use a Tread and power it down for the y1? I would let the power supply in the mini3 handle its side.
5V 300mA.
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post #138 of 1535
12/15/08 at 7:20pm
listen2thisone, the Mini³ power supply and the γ1 must not share "grounds", because the former wlll feed a virtual ground amp whereas the latter is "real ground". This makes it impractical to derive the voltage of one from another. The best solution is to have two completely independent and isolated power supplies.
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post #139 of 1535
12/15/08 at 7:36pm
Ok, Thanks
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post #140 of 1535
12/15/08 at 11:04pm
Quote:
Though if you insist, if you look at the schematics, you'd see that technically, it wouldn't be too hard to adapt another optical in. Either in place of the coax, or in addition(RXP3).
Add a Twisted pear optical module, leave out J2D, C29D, T1D and R1D, solder in a couple of wires and you're done. Except for making it all fit in the default enclosure.
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post #141 of 1535
12/17/08 at 4:40am
Just want to make sure I'm going to do this right, if I want USB in, Digital/Optical in, and Digital/Optical out, then the only parts I exclude are "note 7" correct?
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post #142 of 1535
12/17/08 at 4:57am
Quote:
Note 7. Populate this part only if the USB board will be used as a standalone USB-to-S/PDIF converter (not to be attached to the DAC board).
Doesn't make much sense when taken out of context does it?
(by the time you get to that note there is no context left)

How about

Quote:
Note 7. Populate C11U, C9U, J4U, L3U, R8U, R9U, U4U and U5U only if the USB board will be used as a standalone USB-to-S/PDIF converter (not to be attached to the DAC board).

LL
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post #143 of 1535
12/17/08 at 7:25am
You can't have coax/optical input and coax/optical output at the same time on the γ1. The only configuration that supports coax and optical output is the standalone USB-to-S/PDIF converter using only the USB board, and that board only has USB input.
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post #144 of 1535
12/17/08 at 4:17pm
ok, so if I have usb,spdif,optical in and audio out, (I think that's the lite version?)

Then I omit the following?

4. Omit this part if the USB board will be configured for I²S output and used with the DAC board (a.k.a. "lite configuration").
5. Omit this part if optical S/PDIF output is not needed.
6. Omit this part if coaxial S/PDIF output is not needed.
7. Populate this part only if the USB board will be used as a standalone USB-to-S/PDIF converter (not to be attached to the DAC board).
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post #145 of 1535
12/17/08 at 4:21pm
Quote:
Originally Posted by dude_500 View Post
ok, so if I have usb,spdif,optical in and audio out, (I think that's the lite version?)
Looks more like the "full" version actually.
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post #146 of 1535
12/17/08 at 4:39pm
Ah, ok so it looks like I only exclude these parts?

5. Omit this part if optical S/PDIF output is not needed.
6. Omit this part if coaxial S/PDIF output is not needed.
7. Populate this part only if the USB board will be used as a standalone USB-to-S/PDIF converter (not to be attached to the DAC board).

Also 8. Can be omitted if USB board is configured for S/PDIF output and used with DAC board.
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post #147 of 1535
12/17/08 at 5:22pm
I did that. Mine works
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post #148 of 1535
12/17/08 at 6:55pm
For capacitors like this (80-C320C104K5R)

There are many x7r options avaliable. Does it matter which one I get?
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post #149 of 1535
12/17/08 at 7:00pm
Go for the specified part.
(won't go wrong that way)

http://www.mouser.com/Search/Product...UCHU6a6Q%3d%3d
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post #150 of 1535
12/17/08 at 8:05pm
Quote:
Originally Posted by MisterX View Post
Go for the specified part.
(won't go wrong that way)

C320C104K5R5TA

Oh, I see the rest just contain the model but have more after it. Thanks!
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