WEILIANG DAC5 - WM8741 & Tenor TE7022 - Page 11 - diyAudio
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Old 12th August 2012, 10:23 AM   #101
bcmbob is online now bcmbob  United States
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Module has been ordered. I'll report when it arrives.
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Old 13th August 2012, 07:19 PM   #102
bcmbob is online now bcmbob  United States
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Got a message from Stanton Tin (Jim's Audio - eBay) on the new DAC in post #98. He is only offering the assembled version for now due to the high number of components. Joked that all that soldering is really boaring, one should just enjoy the beautiful sound No comment on a software hook.

I asked that he pass on the feedback he gets from his customers.
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Old 13th August 2012, 08:00 PM   #103
alkasar is offline alkasar  France
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Quote:
Originally Posted by bcmbob View Post
Got a message from Stanton Tin (Jim's Audio - eBay) on the new DAC in post #98. He is only offering the assembled version for now due to the high number of components. Joked that all that soldering is really boaring, one should just enjoy the beautiful sound No comment on a software hook.

I asked that he pass on the feedback he gets from his customers.
actually, this dac is around longer than DAC5 or DAC6. Don't know if weiliang built it. If he did, it should be DAC4
It is DIR9001+2*WM8741. Two wm8741 in a dual mono configuration. Great for increased SNR.
No µcontroller on board, so hardware controlled.
You could challenge which receiver is best WM8805 or DIR9001? They have very similar specs, especially regarding jitter. However, dir9001 needs an additional front-end chip for spdif coax input and I had issues with that in another dac, so now I prefer wm8805. It's also more compact.
USB receiver Tenor TE7022 chip is *far* superior to the pcm2706.
Overall, I consider the dac linked in post #98 expensive for what it is. just my opinion of course
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Old 13th August 2012, 08:52 PM   #104
bcmbob is online now bcmbob  United States
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Thanks alkasar,

That type of information is very helpful. My high regard for the vendor is based on my experience with a JC-2 pre, BP-150 and some PS kits. Stanton is always available for support, which is great for someone like me who often develops two left hands in the middle of a project.

I am aware he started his development on this one almost a year ago. Not sure what modification were made. It will be interesting to hear the feedback he gets.
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Old 14th August 2012, 12:54 AM   #105
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You've made quite a bit of progress. Congratulations!

I would still be suspicious of damaged electrolytic capacitors. I wouldn't be surprised if one or more is the source of that distortion.


Quote:
Originally Posted by bcmbob View Post
Got good results with the new reg but still not there yet. Audio is being produced on both channels - Hooraaayy !!

However the quality is very poor. There is a static mask plus distortion the makes the signal unusable.

It can be heard here.

Does that sound familiar to anyone.
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Old 14th August 2012, 09:33 AM   #106
bcmbob is online now bcmbob  United States
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Originally Posted by dhalbakken View Post
You've made quite a bit of progress. Congratulations!

I would still be suspicious of damaged electrolytic capacitors. I wouldn't be surprised if one or more is the source of that distortion.
Since the distortion is on both channels, wouldn't that indicate the problem is with a component that is either common to both signals or before the audio portion of the DAC (eg. power supply circuit). Any guesses which electrolytics could be within that description? It appears many my be around the WM8741 itself.
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Last edited by bcmbob; 14th August 2012 at 09:47 AM.
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Old 14th August 2012, 03:04 PM   #107
alkasar is offline alkasar  France
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Weiliang came out with a new dac, DAC7. WM8805 + 2 * WM8741
DAC7 - 2 x WM8741 + WM8805 24/192 DAC - OPT + COAX Class A PSU 0.3ppm TCXO | eBay

it will have optional USB input with 24/192 capabilities with USB CM6631
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Old 16th August 2012, 02:32 AM   #108
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Regarding electrolytics: I can't make specific recommendations, but you might check back and look at your original voltage measurements. There were some reversed voltages. I'd check any electrolytics in those circuits.

Regarding the new DAC7: I wonder if the DAC7 will use the nice, low-noise TCXO when it is driven via USB. The Tenor board that plugs into the DAC5 has its own TCXO, and I think it is used when the Tenor board is plugged in instead of the TCXO on the DAC5 board.
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Old 21st August 2012, 02:26 PM   #109
Dikosma is offline Dikosma  Russian Federation
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DAC 7. Has anyone tested it. As it is sound. That's interesting.
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Old 29th August 2012, 06:47 AM   #110
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Quote:
Originally Posted by Dikosma View Post
DAC 7. Has anyone tested it. As it is sound. That's interesting.

Hi Dikosma,
DAC7 lanched on the begining of this August, which is a new products. Combine 2 pcs WM8741 with high quality components, sounds nature and clear. Became a hot seller since listing!
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