[amb]

Quote:

Originally Posted by ShinyFalcon /img/forum/go_quote.gif For the giggles I could build a σ25 using a TREAD board...

lol. But that won't integrate with the σ24...

 

[MisterX]

Would be a real easy PCB to etch.

 

[a1m80t]

Does anyone know what kind of torx screws are normaly included in the box enclosure? I ruined four torx screws tapping the enclosure (I used a flat screw driver)

 

[amb]

a1m80t,the Box Enclosures come with self-tapping philips head screws, not torx. You don't have to tap the enclosure if you use the stock screws. If you want to use nicer socket cap screws, then you should tap the holes with actual taps, not with another screw.

EDIT: oops, I answered wrongly -- was thinking of the Hammond. Box Enclosures come with torx "tapping" screws and philips head screws. Sorry about that.

 

[MisterX]

I have a couple extras floating around....


PM me your address info an I will drop a bunch of them in the mail in the morning.

 

[glt]

Is the OSR pin selectable to match input sampling rate? or is it always set to high? I was looking at the response curves for the DAC and with input sampling rate of 44.1/48K, you can set OSR to 0, Z or 1, According to information elsewhere, setting OSR to 1 turns off the internal upsampler and setting the OSR pin to low tells the DAC to apply maximum (internal) upsampling.

 

[MisterX]

Quote:

Is the OSR pin selectable to match input sampling rate? or is it always set to high?

http://www.amb.org/audio/gamma2/gamma2_v100_pcb_top.jpg

Notice the text next to U6?

 

[glt]

Thanks. I was looking at the filter response curves for 44/48 in the website. Thus the response for 44/48 will be different depending on the OSR setting wouldn't it?

 

[MisterX]

With or without the ASRC installed?

 

[glt]

Without the ASRC. I suppose the graphs in the website for 44.1/48 material without the ASRC are for OSR=1? (bypass the internal oversampling)

 

[MisterX]

http://www.head-fi.org/forums/6079734-post810.html

Edit:

Yes, reconfiguring the OSR pin (by installing a jumper across the corresponding U6 positions) changes the "filter response curve" when a 44.1 or 48K "sample" is fed to the DAC when the ASRC is not installed but it also changes the behavior of the filter mode switch.

 

[Wizik]

Hello, I have one question, when I´m going to solder SMD on Gamma2, solder iron MUST BE grounded ? Because my soldering iron isn´t now.

 

[MisterX]

You should be fine with an "ungrounded iron"

 

[Wizik]

Are you sure ? Lot of people, who are soldering SMD told me, that I need grounded soldering iron and some told me that I need cuprextit desk under y1/y2 PCB conected to soldering iron and to me (for example to metal watch).

 

[amb]

Some parts are ESD-sensitive, but it just depends on your comfort level. I don't use such things as a grounded wrist strap or work surface and have not blown any parts yet... In a lab or production environment those things may be required by the company, but I think most of us get by without them and it's fine. Just observe some basic common sense when handling the parts, such as keeping them in the anti-static bags until you're ready to solder them, don't walk around while holding the bare parts, and touch the grounded case of a computer or other equipment before you touch the parts. That should be good enough.