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Signalyst DSC1
Signalyst DSC1
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Old 13th November 2019, 10:40 AM   #1651
Zoran is online now Zoran  Serbia
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Quote:
Originally Posted by randytsuch View Post
Audiodesignguide has a link for the transformers. Scroll down a little on his page.
PureDSD
Thanks Randy
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Old 14th November 2019, 07:10 AM   #1653
ozcal is offline ozcal  Australia
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Hi guys , quick question : If I am using the dac in rca output mode do I short the unused phase of the balanced output to ground
?
The reason I ask it that output seems very low compared to my dacs with opamp output stages.
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Old 14th November 2019, 07:25 AM   #1654
Raj1 is offline Raj1  United Kingdom
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Quote:
Originally Posted by ozcal View Post
Hi guys , quick question : If I am using the dac in rca output mode do I short the unused phase of the balanced output to ground
?
The reason I ask it that output seems very low compared to my dacs with opamp output stages.
Yes, you short the side of the transformer secondary to connected to the rca shield (return path) to ground.
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Old 14th November 2019, 07:34 AM   #1655
nautibuoy is offline nautibuoy  United Kingdom
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Quote:
Originally Posted by ozcal View Post
Hi guys , quick question : If I am using the dac in rca output mode do I short the unused phase of the balanced output to ground
?
The reason I ask it that output seems very low compared to my dacs with opamp output stages.
ppy's build documentation has a section on connecting the output transformers, which includes schematics.
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Old 14th November 2019, 07:37 AM   #1656
ozcal is offline ozcal  Australia
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Originally Posted by Raj1 View Post
Yes, you short the side of the transformer secondary to connected to the rca shield (return path) to ground.
So + connected to rca hot and -ve and ground connected to ground?
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Old 14th November 2019, 08:21 AM   #1657
ozcal is offline ozcal  Australia
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Quote:
Originally Posted by nautibuoy View Post
ppy's build documentation has a section on connecting the output transformers, which includes schematics.
Thanks NB , had a look but I am using the original (Chinese) DSC1 board and being a novice I can't figure out what to do. I am using the recommended 10K:10K Chinese transformers.

Last edited by ozcal; 14th November 2019 at 08:34 AM.
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Old 14th November 2019, 12:41 PM   #1658
Raj1 is offline Raj1  United Kingdom
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Quote:
Originally Posted by ozcal View Post
So + connected to rca hot and -ve and ground connected to ground?
Yes.
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Old 15th November 2019, 10:17 PM   #1659
koldby is offline koldby  Denmark
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Hi all
First my DSC2 is now the best I have heard after I changed my PS to LifePo4 batteri supply for the board and also for the amanero USB interface. Beware the DSC2 is a power hungry beast

Next.
Can we use this instead of the amanero?:
DIYINHK XMOS Multichannel 32ch USB to/from I2S/DSD SPDIF Interface | Dimdim's Blog

I really want a multichannel solution (at least 4 channel) so I can use audiolense to do the x-over filter for my line arrays to the subs I am planning...
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Old 15th November 2019, 11:02 PM   #1660
Signalyst is offline Signalyst  Finland
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Originally Posted by koldby View Post
This was much better sound wise and noise wise than with any other F-F I tried and I wonder if Pavels experiment with a DSC1 made with F-F (Signalyst DSC1 post #577) could be a winner, if 74AUC1G74 was used instead. IMHO the reason AUC1G is performing so well is that rise and fall times are almost equal and q and q bar is also very equal.
The NXP AHCT595's I'm using in the original DSC1 design have very nice characteristics (running from 5V PSU).

Any of 3.3V parts I've seen have horribly bad timing performance.

Maybe due to gate capacitances being less issue at higher voltages/current drives?
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