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Gamma-2 (γ2) DAC Thread - Page 14

post #196 of 2109
7/25/09 at 2:57am
Someone asked me if we could have used a smaller enclosure today...

The answer was:
I don't see how we could fit all the inputs and outputs into a smaller enclosure.



(yes, the boards are upside down)
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post #197 of 2109
7/25/09 at 3:20am
Talk about brainfreeze. For the longest time, I kept staring at the board... wondering why the coax input was red.. why the rca outs were spaced so closely together.. and it wasn't until I saw that the coax wasn't no longer next to the optical input that I realized that I was looking at the wrong jacks altogether.

It looks great though =)
Count me in for the first batch of production boards
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post #198 of 2109
7/25/09 at 4:30am
Quote:
Originally Posted by Beefy View Post
Looks nice!

...... but why all the extra holes on the PCB
it reduces shipping weight. duh!


(I'm kidding)
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post #199 of 2109
7/25/09 at 4:47am
Nobody seems to have asked, how does it sound? Is it a noticable improvement over just the Y1?
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post #200 of 2109
7/25/09 at 5:36am
As of now, only MisterX has heard the γ2, and he appears to be pleased. I should have one up and working within a couple days. We are focused on non-subjective stuff at the moment, such as making various measurements. γ2 is based on some top-tier parts, and I have no reason to doubt that it would perform accordingly.

Since you're on the prototyping team, and the PCB is on the way to you, build it and hear it for yourself.
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post #201 of 2109
7/25/09 at 10:41am
Is it the perspective of the shot or is it a little saggy in the middle? Again, I'm really quite amazed at how tidy it is. Starting to wish I had jumped on the proto team...ah well.
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post #202 of 2109
7/25/09 at 3:18pm
Excellent work. Are you expecting v0.12 to be moved up to v1.0 after the beta testers have built them? Or perhaps there will need to be another batch made for testing, such as v0.13 etc?

BTW, it looks like that case would make an excellent heatsink. Not really needed for this DAC but I was thinking about voltage regs or maybe a beta 22.
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post #203 of 2109
7/25/09 at 4:20pm
Quote:
Is it the perspective of the shot or is it a little saggy in the middle?
A little of both
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post #204 of 2109
7/25/09 at 4:39pm
Quote:
Originally Posted by Mr.Duck View Post
Excellent work. Are you expecting v0.12 to be moved up to v1.0 after the beta testers have built them? Or perhaps there will need to be another batch made for testing, such as v0.13 etc?
I don't think we need another proto run. After the current testing phase we will bump the revision to v1.0 and incorporate all changes learned.

Quote:
BTW, it looks like that case would make an excellent heatsink. Not really needed for this DAC but I was thinking about voltage regs or maybe a beta 22.
β22 in this little case? I don't think so.
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post #205 of 2109
7/25/09 at 5:22pm
some initial close-up photos of my solder-in-progress board:









I'm waiting on some parts before I can proceed.
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post #206 of 2109
7/25/09 at 5:28pm
Nice work! Can't decide what's better the soldering or the photography!!
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post #207 of 2109
7/25/09 at 5:33pm
thanks, billy

gotta admit, I used the old flood-n-suck method on those 2 so28 chips. but it gets the job done with little hair-pulling
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post #208 of 2109
7/25/09 at 11:06pm
update:

IT WORKS!

for a while, though, I was getting no audio-out. all voltages seemed ok.

amb suggested I recheck (cough) the extra line between the y1 spdif/receiver board and the y2 board. this is where the i2s data comes from - and I didn't connect that wire

2 quick solder connections, replugging and I got music out the rca connectors. both of them, in fact



(no, the molex connectors are not part of the standard build. that's my doing.)
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post #209 of 2109
7/25/09 at 11:13pm
Nice job - soldering and photos (as always)
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post #210 of 2109
7/25/09 at 11:23pm
Yea, as always you seem to have the perfect lighting and all.
Are those FM's for output coupling, bypassed with amb shop caps?
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