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Old 5th July 2013, 07:54 PM   #961
glt is offline glt  United States
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Quote:
Originally Posted by sipo75 View Post
My "build" - unbalanced direct out. I am planninng on replacing the toroid with an r-core transformer. The DAC seems to be very sensitive to power line influences. When I switch the bathroom lights the DAC looses the lock for a second. USB only so far.

The sound is an improvement compared to the Musical Fidelity V-DAC II which I was listening with for a year now. A very noticeable improvement in bass.
I have never lost lock due to switching lights.
I do have a power conditioner (one of those Monster Cable types) and all the wiring in the house is 3-wire with earth.

I see you have an EMI filter, so the lines are already decoupled to ground.
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Old 5th July 2013, 09:13 PM   #962
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Originally Posted by sipo75 View Post
My "build" - unbalanced direct out. I am planninng on replacing the toroid with an r-core transformer. The DAC seems to be very sensitive to power line influences. When I switch the bathroom lights the DAC looses the lock for a second. USB only so far.
I never lose lock, usb only (knock on wood). House is relatively new as houses go, around 40 years old, so I think my power lines inside are reasonable.

I am using two 6.3v split bobbin transformers (I had them around), and each one is connected to a "felix", which consists of a set of x caps, a common mode choke and another set of x caps. I plug this into another power conditioner, so my power should be pretty clean.

I'm pretty sure you torroid is big enough
How many VA is that thing?

BTW, what are you using for an output stage?
Did you change your output to single ended?

I installed a pair of LL1684's a few days ago, they sound pretty nice, pretty sure they are going to stay.

Randy
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Old 5th July 2013, 11:50 PM   #963
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Quote:
A very noticeable improvement in bass.
Definitely !

Quote:
I installed a pair of LL1684's a few days ago, they sound pretty nice, pretty sure they are going to stay.
Mine are also staying
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Old 6th July 2013, 08:16 AM   #964
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Originally Posted by yildiray View Post
Hi quanghao,

I received DAC thank you.There isn't any cosmetic problem .

But i couldn't see opamps and any Input and output connectors ??

Amanero unassembled.

I paid extra 180$ for them am i wrong?

Thank you
Hi quanghao said to me extra 180 $ is not include opamps,connectors,assambling .He said 180 dolar just for fedex :

"Hi,
You have to register to buy the following items:
- Kit DAC: 01
- Kit IV: 01
- Chassis: 01
- Tranformer: 01
- USB: 01
Total amount of goods: 750USD
Shipping by Fedex: $180

You have to pay me respectively:
- Paid 1: 375 usd (on 03/15/2013)
- Paid 2: 375 usd (on 05/06/2013)
- Paid 3: 150 usd (on 06/17/2013)
- Paid 4: 30usd (on 06/20/2013)

I think maybe we have a complete misunderstanding of the DAC."

So other buyers must be careful about this issue.
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Last edited by yildiray; 6th July 2013 at 08:23 AM.
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Old 6th July 2013, 08:35 AM   #965
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Originally Posted by yildiray View Post
So other buyers must be careful about this issue.
Hi Quanghao, I paid $150 extra on 16th June and registered for a complete DAC. Please update the spreadsheet.
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Old 6th July 2013, 12:17 PM   #966
sipo75 is offline sipo75  Europe
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Quote:
Originally Posted by randytsuch View Post
I never lose lock, usb only (knock on wood). House is relatively new as houses go, around 40 years old, so I think my power lines inside are reasonable.

I am using two 6.3v split bobbin transformers (I had them around), and each one is connected to a "felix", which consists of a set of x caps, a common mode choke and another set of x caps. I plug this into another power conditioner, so my power should be pretty clean.

I'm pretty sure you torroid is big enough
How many VA is that thing?

BTW, what are you using for an output stage?
Did you change your output to single ended?

I installed a pair of LL1684's a few days ago, they sound pretty nice, pretty sure they are going to stay.

Randy
The toroid is specified with 50VA - 2x6.0V/4.17A.

Yes, I am using the single ended output configuration now. Set output to unbalanced with the remote and removed the jumpers J5,J8,J7,J6. Shorted the DAC+ and DAC-. No tear down resistor (10R) yet - I will try that today.

I plan to build the Sen V18 as I/V stage. The FETs are on their way.

Felix? What are x caps?
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Old 6th July 2013, 01:50 PM   #967
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Originally Posted by sipo75 View Post
Felix? What are x caps?
x caps are capacitors that are used to put between the live and neutral of the mains AC, in case of failure they don't short.

Where can I find some more information about the Sen V18 as I/V stage?

Regards,
Danny
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Old 6th July 2013, 02:39 PM   #968
Gricko is offline Gricko  Croatia
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[QUOTEWhere can I find some more information about the Sen V18 as I/V stage?][/QUOTE]Zen -> Cen -> Sen, evolution of a minimalistic IV Converter
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Old 6th July 2013, 02:41 PM   #969
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Zen -> Cen -> Sen, evolution of a minimalistic IV Converter
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Old 6th July 2013, 04:01 PM   #970
sipo75 is offline sipo75  Europe
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Default SEN IV V18

Quote:
Originally Posted by danny_66 View Post
x caps are capacitors that are used to put between the live and neutral of the mains AC, in case of failure they don't short.

Where can I find some more information about the Sen V18 as I/V stage?

Regards,
Danny
Thanks.

The above mentioned thread is the place to look. V18 refers to the version of the SEN designed for the ES9018.

The original article from Linear Audio http://www.linearaudio.net/images/on...0-vol2euvl.pdf

Attached the schematics of the V18 version that I have found.

The group buy thread
SEN / CEN All JFET IV Converter Evaluation Pack
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