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Signalyst DSC1
Signalyst DSC1
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Old 13th August 2019, 09:19 PM   #1481
nautibuoy is online now nautibuoy  United Kingdom
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Hmmm, what's cooking?

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Old 13th August 2019, 11:13 PM   #1482
minivan is offline minivan  Australia
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Quote:
Originally Posted by quanghao View Post
it is good for choose! not worry about it!

thanks
i am hearing lots of distortion with those transformers installed,currently just temporary has a twistedpear ivy installed for testing until i sort out with the correct output transformers.

i believe thuan43 sold me the wrong model.
according to this post
ЦАП DSD Signalyst DSC1 — DIY - Цифровые источники - DA Stereo
it's model PT-11, not R3 as suggested by ppy, so builder be aware.
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Old 14th August 2019, 05:21 AM   #1483
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by minivan View Post
i am hearing lots of distortion with those transformers installed,currently just temporary has a twistedpear ivy installed for testing until i sort out with the correct output transformers.

i believe thuan43 sold me the wrong model.
according to this post
ЦАП DSD Signalyst DSC1 DIY - Цифровые источники - DA Stereo
it's model PT-11, not R3 as suggested by ppy, so builder be aware.
You use new board design off pyy with reclok ???

You have noise output???
Thanks your advice!
Quanghao
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Old 14th August 2019, 05:27 AM   #1484
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by randytsuch View Post
What changes were made in the v3.0 boards?
Hi! I make the sample new design off ppy, but there are a lot off noise.
So i have some change , it is excellent,
Noi noise , better sound,
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Old 14th August 2019, 06:04 AM   #1485
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by ozcal View Post
Interesting Quanghao. How much will it cost?
Hi. I think about 150 $ with board in the sample image , without transformer output and usb amanero.
Thank your advice!
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Old 14th August 2019, 08:25 AM   #1486
Vit123 is offline Vit123  Russian Federation
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Quote:
Originally Posted by quanghao View Post
Hi! I make the sample new design off ppy, but there are a lot off noise.
So i have some change , it is excellent,
Noi noise , better sound,
What "noise" had been found in new ppy's DSC? Do you have any measurements?

What changes had been made to eliminate "noise"?
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Old 14th August 2019, 10:42 AM   #1487
minivan is offline minivan  Australia
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Quote:
Originally Posted by quanghao View Post
You use new board design off pyy with reclok ???

You have noise output???
Thanks your advice!
Quanghao
i am talking about distortion from the wrong output transformer sold by thuan43 , not about ppy board design vs yours
those wrong transformer cost me $33.5 usd plus shipping fee ,money down the drain, just want to let future builders know so they won't repeat the same mistake.
yes, like vit123, do you have any measurement for your design vs ppy design?
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Old 14th August 2019, 01:49 PM   #1488
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by Vit123 View Post
What "noise" had been found in new ppy's DSC? Do you have any measurements?

What changes had been made to eliminate "noise"?
You have not heard: boiling ?? like water heating ??

I saw, and my measurement results also saw.
thank your advice!
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File Type: jpg ppy dsd v2-1 new.jpg (220.6 KB, 130 views)
File Type: jpg ppy dsd v2-1 (1).jpg (148.2 KB, 67 views)
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Old 14th August 2019, 01:50 PM   #1489
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by minivan View Post
i am talking about distortion from the wrong output transformer sold by thuan43 , not about ppy board design vs yours
those wrong transformer cost me $33.5 usd plus shipping fee ,money down the drain, just want to let future builders know so they won't repeat the same mistake.
yes, like vit123, do you have any measurement for your design vs ppy design?
I would like to condolence to you!

Unfortunately for you!

thank you!
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Old 14th August 2019, 02:23 PM   #1490
Vit123 is offline Vit123  Russian Federation
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Quote:
Originally Posted by quanghao View Post
You have not heard: boiling ?? like water heating ??
I've heard only one strange artifact - a distorted echo of the main signal (~ - 15dB/-20dB from main signal). Can be heard in a quiet section after a loud one.
As I remember, only at DSD512 with any HQP modulator and at DSD256 with some HQP modulators. Only when DSC is directly connected to power amp (HQP as a software volume control with ~ -30dB attenuation).

Several people confirmed it at russian DSC thread.

Do you talk about it? I'd like to know how did you fix it and what was the reason.

Measurements - could you publish THD+N measurements with -1 dBFS (or -3 dBFS) and -10dBFS input signals?
I am interested in, as in 2.5.2/2.6.2 THD increased significantly with -1/-3dBFS input signal (IMO - due to resistors inaccuracy at small SDM modulation level).
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