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y1 gamma-1 DAC - Page 35

post #511 of 1535
3/16/09 at 4:31pm
I love my gamma1, i now have to sell due to changing to balanced system.
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post #512 of 1535
3/16/09 at 5:42pm
I love mine too, hooked up to a Starving Student amp and my orthodynamics it sounds excellent. I can't build them but can say it's well worth its small cost.
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post #513 of 1535
3/16/09 at 5:56pm
Quote:
Originally Posted by smeggy View Post
I love mine too, hooked up to a Starving Student amp and my orthodynamics it sounds excellent. I can't build them but can say it's well worth its small cost.
Smeggy, don't say that! You did great building the SS, I bet you could build one of these.
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post #514 of 1535
3/16/09 at 6:40pm
If I can manage to swap out a mini3 opamp in situ then I may believe you
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post #515 of 1535
3/16/09 at 9:29pm
Does anyone know how much a digikey ones of these would be since mouser is out of alot of stuff. Im trying to make a usb one as cheap as possible. Or im going to have to get a bam dac to stay in budget.
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post #516 of 1535
3/16/09 at 11:14pm
Quote:
Originally Posted by nightanole View Post
Does anyone know how much a digikey ones of these would be since mouser is out of alot of stuff. Im trying to make a usb one as cheap as possible. Or im going to have to get a bam dac to stay in budget.

Less then $35 but that does not include shipping or any of the parts offered by amb.
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post #517 of 1535
3/18/09 at 9:28pm
Quote:
Originally Posted by rhys h View Post
I wish i could get balanced output from this thing! I dont want to see it go so soon
Poor you...

<mod edit>
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post #518 of 1535
3/26/09 at 5:25pm
I built a full-configuration version earlier this week, and it works great. So far I've used it usb from my work pc into a mini3, and optical from an airport express into an onkyo receiver.

The only issue is that I somehow killed my usb board the day after I got everything built. It happened at work, powered by wallwart and hooked up to usb. It had been working fine all day, but then I went to move it over on my desk, and had a static shock touching the case. The light immediately turned from green to red, and now I get the "usb device not recognized" message on plugging it in. I'm measuring correct voltage at the test points on the usb board, and the DAC board itself still works with SPDIF. I'm going to try replacing the pcm2707 chip, does anyone have other suggestions?
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post #519 of 1535
3/26/09 at 8:16pm
pddjsteve, most likely the static discharge damaged U1U (PCM2707) and/or U2U (SN74AHC1G08).
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post #520 of 1535
3/27/09 at 4:37am
Hey, so I'm also having the "USB Device Not Recognized" error. All voltage readings are correct, and I've checked/re-flowed all the solder... How easy is it to fry the SMDs? There isn't much on this board, what did I do?
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post #521 of 1535
3/27/09 at 10:12am

Questions about electronics

Hi!
I bought a y1 DAC from MisterX. It sounds very good using lossless and bit-perfect from my computer! It's my first one, so I don't really have anything to compare it to other than my iPod LOD. It's a great DAC, well done!

I've only been using it via USB, so I have not yet gotten myself a regulated 5V AC/DC adaptor. Via PMs MisterX told me it uses a 100mA one, but when I look on AMBs website the rear view of the y1 says 300mA. I've heard it consumes 70~90mA?
Now, what I wonder must be pretty simple, but how does a wall wart support a device with electric power? If the wart says "500mA" for example, does it "shoot out" 500mA constantly or does it give the device the possibility to "draw" the required amount of current needed up to 500mA?

I asked a specialist store here in sweden what they had and found this: https://www1.elfa.se/elfa~se_sv/b2b/...do?tab=catalog
Output is 5-12V, 0.2-0.3A. Would it work or is the current too high? Do you know where to find cheaper wall warts suitable for the y1? The one I found costs a whopping $40-45 without the cord! Or is this the price I should expect for a regulated adaptor with 5V and 100-200mA output?

Thanks for helping me out, I really don't know much yet!
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post #522 of 1535
3/27/09 at 10:21am
Well the device will draw the amount of current it needs. The rating on the wallwart is its MAX amount of current it can provide. Now some Wallwart that are overrated for the application may provide a higher voltage than they are rated for, however this is usually not the case in a switching regulated PSU that you would use for the y1.

I am not sure about the economics in Sweden, however in the U.S. $40-$50 is way too much for a switching regulated wallwart for the y1. I would expect to pay about $10-$20.
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post #523 of 1535
3/27/09 at 10:37am
I found in an "aussi y1 group buy" thread this:

Quote:
Originally Posted by MisterX View Post
Digi-key does offer a switch mode adapter with a multi plug kit but I would rather you use a linear regulated adapter if you can find one.

Digi-Key - T946-P5P-ND (CUI Inc - EMS050120-P5P-SZ)
In what way would a linear regulated adapter be better than a switching? FWIR, the switching is a newer type of adapter which is better in (almost?) every way than an old, linear one. But as I've said, I'm very new to this.

The economics in Sweden is quite bad at the moment, but I still think the swedish price is way too high.

I don't even know what to search for (in swedish) on google. Maybe I should look around in real life, ask the staff working in that kind of stores.
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post #524 of 1535
3/27/09 at 10:45am
Quote:
Originally Posted by t0dy View Post
I found in an "aussi y1 group buy" thread this:



In what way would a linear regulated adapter be better than a switching? FWIR, the switching is a newer type of adapter which is better in (almost?) every way than an old, linear one. But as I've said, I'm very new to this.

The economics in Sweden is quite bad at the moment, but I still think the swedish price is way too high.

I don't even know what to search for (in swedish) on google. Maybe I should look around in real life, ask the staff working in that kind of stores.
A linear adapter provides less noise in most cases than a switching. Switching is cheaper, smaller, more power efficient. Not sure how much the y1 would benefit from using a cleaner linear supply? Since AMB recommends a switching supply and the power you get from the USB comes from a switching supply I suspect you would see little benefit using a linear supply.

AMB has recommend supplies on his site.
USA - 5 VDC 1.6 AMP SWITCHING POWER SUPPLY | AllElectronics.com
Euro - 230V EURO SWITCHING SUPPLY, 5VDC 1A | AllElectronics.com

HOWEVER - note that the neat thing about the gamma1 is that it can be powered by the USB even if you are using the SPDIF input. You could use one of the phone charges you may already own to power it via USB and have your input on one of the SPDIF inputs.
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post #525 of 1535
3/27/09 at 12:07pm
Yeah, the EURO one looks good. Costs only $5.50 BUT the total price is $22, my god... And it says: "We cannot accept your order on-line.
Please print your order and either email (allcorp@allcorp.com) or fax (818-781-2653) us your order. You will receive a shipping quote."

Does anyone know where I should start looking for a suitable power supply for the y1 in Sweden or in Europe with not-so-darned expensive shipping?

Thanks!

About the phone chargers, I'm not really sure what you mean. Do you mean power the y1 via USB cable from computer and then use S/PDIF to stream the data?

EDIT: Oh, you mean a wall wart with USB output? Should this work you mean? Please confirm so I can say WOOHOO!
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