Wolfson WM8740 DIR9001 PCM2706 DIY DAC - Page 8

noSmoking · 8th September 2011, 12:09 AM

btw the square plug that is empty is for a headphone amp out L,R G 12+

cobretti · 08:45 PM

Probably, yes. It should be the same as RCA outputs, my guess.

noSmoking · 9th September 2011, 09:58 PM

hi,
This board sounds great I am working to getting a box for it to live in it's been playing for 3 days now so we will see how it sounds in a week or so ,
btw I did put some small mostly vertical heatsinks on the 7808's and it did cool them a bit.still listening to diff opamps.....
Happy Listening!!!!!!!!!

dtses · 13th September 2011, 10:18 AM

here are few pics of mine

finished inside but still have some work on the case.

Also considering to add optical input (need it to connect LG LED). Found several options:

-just add this inside the case
-use separate device
-or build my own and connect it to Coax input. It looks very easy

noSmoking · 13th September 2011, 03:35 PM

that's a nice rig you got going tell me what is the silver wire I can tell they run ac but what kind are they!
I will make a picture of the heatsinks I put on 7808 they are not real pretty but you can hardly feel the warm on them now I actually consider cutting them in half and let then get a little warmer,lol.

jnewbold · 28th September 2011, 11:08 AM

I don't need the USB input on a DAC. Can I simply leave off all the all parts associated with PCM2706 etc? Seems pointless to populate the board with stuff I don't need.

Joe.

noSmoking · 28th September 2011, 03:40 PM

Hi jnewbold,
Yes omit those parts and it will work fine I have one running like that .
Cya!

cobretti · 1st October 2011, 03:00 AM

Quote:

Originally Posted by dtses

here are few pics of mine

finished inside but still have some work on the case.

Also considering to add optical input (need it to connect LG LED). Found several options:

-just add this inside the case
-use separate device
-or build my own and connect it to Coax input. It looks very easy

Looks nice, I just don't understand why you running silver power wires loop all around the enclosure and back. I think you would do better if you go straight to fuses.

dtses · 1st October 2011, 10:45 AM

Quote:

Originally Posted by cobretti

Looks nice, I just don't understand why you running silver power wires loop all around the enclosure and back. I think you would do better if you go straight to fuses.

well, frankly speaking that seems to me the only way to put ferrite filter inside the box

Anyway, I think half of a meter of this silver mains doesn't influence on anything.

here are few more pics

bartmalow · 6th October 2011, 12:27 PM

Hi,
Anyone can advise me on transformer to be used for this dac. I have some old toroidal transformer. I presume it's about 40-50AV with secondary output voltage 2 x 15v and 2x 10v.
Do you think it would be suitable? I have also chassis mounting transformer 2x9v, 12VA. I was planning to buy 30AV 2x15v for the analogue circuit.

Cheers,

8th September 2011, 08:43 PM	#72
cobretti diyAudio Member Join Date: Feb 2011 Location: Taxachusetts	Probably, yes. It should be the same as RCA outputs, my guess. Last edited by cobretti; 8th September 2011 at 08:45 PM.

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8th September 2011, 12:09 AM	#71
noSmoking diyAudio Member Join Date: May 2010 Location: Texas	btw the square plug that is empty is for a headphone amp out L,R G 12+

9th September 2011, 09:58 PM	#73
noSmoking diyAudio Member Join Date: May 2010 Location: Texas	hi, This board sounds great I am working to getting a box for it to live in it's been playing for 3 days now so we will see how it sounds in a week or so , btw I did put some small mostly vertical heatsinks on the 7808's and it did cool them a bit.still listening to diff opamps..... Happy Listening!!!!!!!!!

13th September 2011, 03:35 PM	#75
noSmoking diyAudio Member Join Date: May 2010 Location: Texas	that's a nice rig you got going tell me what is the silver wire I can tell they run ac but what kind are they! I will make a picture of the heatsinks I put on 7808 they are not real pretty but you can hardly feel the warm on them now I actually consider cutting them in half and let then get a little warmer,lol.

28th September 2011, 11:08 AM	#76
jnewbold diyAudio Member Join Date: Jun 2003 Location: Perth, Australia	I don't need the USB input on a DAC. Can I simply leave off all the all parts associated with PCM2706 etc? Seems pointless to populate the board with stuff I don't need. Joe.

28th September 2011, 03:40 PM	#77
noSmoking diyAudio Member Join Date: May 2010 Location: Texas	Hi jnewbold, Yes omit those parts and it will work fine I have one running like that . Cya!

6th October 2011, 12:27 PM	#80
bartmalow diyAudio Member Join Date: May 2011 Location: Dublin	Hi, Anyone can advise me on transformer to be used for this dac. I have some old toroidal transformer. I presume it's about 40-50AV with secondary output voltage 2 x 15v and 2x 10v. Do you think it would be suitable? I have also chassis mounting transformer 2x9v, 12VA. I was planning to buy 30AV 2x15v for the analogue circuit. Cheers,