[dean0]

Putting together this dac from ebay, done all mods etc. but did not get a transformer with it. What size/rating do I need (uk voltage)? Any links would be helpful, thanks in advance

 

[linuxworks]

which mods did you do?

I lost track and never really settled on any magic setup, myself. I have a half-disassembled board but there was so much to read thru to find the 'final' config that everyone liked - I kinda gave up and moved on

if you are using the onboard opamp, you need 5, 12, -12v. if you don't use the opamp and are powering only the dac, you only need 5v.

I was planning on bypassing the opamp (just tapping into the dac's - and - outputs for the l,r) and supplying the rest, myself. in that case I'd only need 5v for that.

 

[gurusan]

i am using only 5V to power the DAC as I skipped out the opamp stage and it sounds great.

I'm actually just using an unregulated 300ma 5V phone charger which then gets cleaned up by a CRC filter, a few caps, and a 5V regulator.

 

[dean0]

Quote:

Originally Posted by linuxworks /img/forum/go_quote.gif which mods did you do? I lost track and never really settled on any magic setup, myself. I have a half-disassembled board but there was so much to read thru to find the 'final' config that everyone liked - I kinda gave up and moved on if you are using the onboard opamp, you need 5, 12, -12v. if you don't use the opamp and are powering only the dac, you only need 5v. I was planning on bypassing the opamp (just tapping into the dac's - and - outputs for the l,r) and supplying the rest, myself. in that case I'd only need 5v for that.

thanks bud, only done bypass mod so far but I have few more planned

Is this the transformer i will need? Nuvotem | Transformers | Transformers | Toroid Transformers | Toroidal Mini Open Style 115-230Vac Primary 1.6VA to 7VA

 

[dean0]

anyone? I cannot find this infomation anywhere

 

[dean0]

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Test fit, dac/psu still need recapping, just need to know what transformer I need............................

 

[Pars]

Did you perhaps try doing a search of this thread for starters?
http://www.head-fi.org/forums/search.php?searchid=8188344

Also, on the previous page of this thread, in post 143 is a link to diyaudio which also might be a great place to get the info you seek. As well as asking the seller that you bought this from.

I don't own one of these BTW.

 

[dean0]

Quote:

Originally Posted by Pars /img/forum/go_quote.gif Did you perhaps try doing a search of this thread for starters? http://www.head-fi.org/forums/search.php?searchid=8188344 Also, on the previous page of this thread, in post 143 is a link to diyaudio which also might be a great place to get the info you seek. As well as asking the seller that you bought this from. I don't own one of these BTW.

thanks bud

 

[V-DiV]

Quote:

Originally Posted by linuxworks /img/forum/go_quote.gif if you are using the onboard opamp, you need 5, 12, -12v. if you don't use the opamp and are powering only the dac, you only need 5v.

I just received my 'noodle' DAC. I got it without the transformer. Does anyone have a Mouser part number for a good one to power this? I have read the entire thread more than once and I don't believe one was listed. I'm going to run with the opamp (Adamus' pick), at least to start. Thanks.

 

[adamus]

I havent measured mine, but i guess a 12v toroid is what you want. doubt you would need anymore than 20va either. you using the powersupply board?

 

[V-DiV]

Quote:

Originally Posted by adamus /img/forum/go_quote.gif you using the powersupply board?

Yes, I just want to get it up and running first. Then I'll start playing with modifications.

 

[adamus]

I think 12v dual secs is what you want.

 

[L_u_k_a_s]

I'v been advised by seller of such a DAC to use 12-0-12VAC 500mA power supply. You can get centre tapped toroid, but easier and cheaper is to use regular toroid with two secs, 15 VA, and tie two wires from secs together - this connects to "0" on DAC separate AC->DC board.

Nuvotem | Transformers | Transformers | Toroid Transformers | Toroidal 230Vac Primary 15VA to 1000VA

 

[ericj]

Just got one of these, and i have to say, boy, the quality. Where is it?!

Pin 2 is lifted and bent over to pin 3 on the dac. Easy to fix, but, gives one the impression that these weren't inspected at all.

I don't get what people are doing to remove the opamp stage entirely - i mean, given that the output of the DAC is differential (aka balanced).

 

[fordgtlover]

Quote:

Originally Posted by ericj /img/forum/go_quote.gif Just got one of these, and i have to say, boy, the quality. Where is it?! Pin 2 is lifted and bent over to pin 3 on the dac. Easy to fix, but, gives one the impression that these weren't inspected at all. I don't get what people are doing to remove the opamp stage entirely - i mean, given that the output of the DAC is differential (aka balanced).

Some tweaks really improve this DAC. Have you seen this thread?