[amb]

Quote:

Originally Posted by geezer /img/forum/go_quote.gif As far as the opamp is concerned, I think I am looking for something subjective. ... I want to fit the best from the start.

One person's subjective preference does not make it "best" for everyone else. If I tell you I like apples better than oranges, that doesn't make apples the "best" does it?

One thing you can be certain of, is that both opamps will provide excellent sound. You can't go wrong with either one.

 

[geezer]

Quote:

Originally Posted by amb /img/forum/go_quote.gif One person's subjective preference does not make it "best" for everyone else. If I tell you I like apples better than oranges, that doesn't make apples the "best" does it? One thing you can be certain of, is that both opamps will provide excellent sound. You can't go wrong with either one.

It does if you are comparing apples...

Thanks for that - I'll go with the AD8656 - I have a bit of a soft spot for Analog Devices.

Cheers - Ken

 

[geezer]

I just thought I'd post to thank AMB and MisterX for their help and advise - I fitted the AD8656 opamp. The γ2 is now working - And sounding superb. I have it playing as I type through my M³ into AKG K701's

and I am in audio heaven.

So, for anyone in a similar position of being unsure which opamp to choose - Don't think the AD8656 is second best.

BTW - I found that a thin bead of solder along the ground plane edges of both γ1 and γ2 help to make a nice snug fit in the case slots, so you get a really good ground connection with the case.

Cheers - Ken

 

[amb]

Good to hear! (double entendre, lol)

 

[MisterX]

No pics?

What a jip....

 

[geezer]

Quote:

Originally Posted by MisterX /img/forum/go_quote.gif No pics? What a jip....

OK, can do that - Just give me a little while to crank up the camera and I'll post a few snaps.

Ken

 

[geezer]

OK, as promised - Here are a few pics of my completed γ2. I have also included the γ1 which I build some time ago.

Here is the γ1 re-joined using pieces of copper wire soldered on the joint line. It may not look pretty, but it does the job.

The γ2 ready to be connected to the γ1

A couple of shots of the final build. I really like the red case. I wont be needing digital out, so the front can be minimalist.

I isolated the phono jacks with a thin strip of tape to make sure they don't come into contact with the case.

Thanks for looking - Comments will be appreciated...

Cheers - Ken

 

[pila405]

The pics. are very very small. Can see none.

 

[geezer]

Quote:

Originally Posted by pila405 /img/forum/go_quote.gif The pics. are very very small. Can see none.

Yeh, sorry about that I posted the thumbnails - Should be OK now, I have re-loaded images.

Ken

 

[MisterX]

Nice job.

 

[tally3tally]

hi im following this for a long time now but am confused between the parts lists for a gamma2 a gamma1 partslists is also required and am mixing things up
can someone please point me to a fully populated BOM so i can compare my partslist


kindly disregard the above

these are now my questions

my setup
itunes- airport express-- Gamma2 optical in --output to my Amp

Gamma2 setup

Gamma1 in E: S/PDIF DAC only config (coax and optical inputs, selectable with front panel switch, no USB board).
and
Gamma2 board mated to it

external power

Questions

1) Is this the right way to go??

1) later if and when i feel the need of a Usb interface can i add the usb board ???
lemme know if im going terribly wrong in understanding the working concept....

 

[pila405]

GREAT WORK geezer! Looks awsome!!!
I realy like this metalic red.

 

[deerinheadlights]

I want to use Sigma11 configured for 5 volts to power the y1y2 full++. I don't know what VA toroidal to get. Y236001 (9v+9v, 15VA) or Y236101 (9v+9v, 30VA) would be more than enough or too much?

 

[amb]

30VA is more than enough for y1/y2, but if you want to make something that could also power other more current-hungry devices, then it won't hurt to over-rate the transformer a bit.

 

[m1abrams]

Quote:

Originally Posted by amb /img/forum/go_quote.gif 30VA is more than enough for y1/y2, but if you want to make something that could also power other more current-hungry devices, then it won't hurt to over-rate the transformer a bit.

Maybe like a micro-controller that someone has in the prototype stages