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A NOS 192/24 DAC with the PCM1794 (and WaveIO USB input)
A NOS 192/24 DAC with the PCM1794 (and WaveIO USB input)
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Old 18th September 2018, 08:32 PM   #6671
mbrennwa is offline mbrennwa  Switzerland
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Quote:
Originally Posted by edwtsui View Post
Hi,

Just want to clarify one thing. For power supply PCB, C1/C3 were marked as 4.700uF but those two are the largest among all cap. Should they be 4700uF instead of 4.700??
The dot is confusing, if not wrong. 4700 μF is right.
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Last edited by mbrennwa; 18th September 2018 at 08:35 PM.
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Old 18th September 2018, 10:58 PM   #6672
edwtsui is offline edwtsui  Hong Kong
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Quote:
Originally Posted by mbrennwa View Post
The dot is confusing, if not wrong. 4700 μF is right.
Thanks. Supposed they are reservoir caps and shouldn't be that small.
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Old 19th September 2018, 10:34 PM   #6673
karahana is offline karahana
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I tried different configurations with my dacs and what I did come to
1 Battery is very clear, it improves basically everything but lacks the dynamics (no go for me)
2 ReClock board is very dependent on the power, different power gives different lets say signature and clarity
3 Tube output gives in comparison to duelunds only analog sounding. Since I don’t have very good tubes (6H6P) I lose some clarity and presence. I presume with good DHT (like 101D) it will add some magic. It would be an interesting comparison between sowters and tube.
4 Again confirm the point of view that the sound is a modulated electric signal. Without good power, there will not be good sound.
If I need to rate the impact
1. Power
2. Reclock (it does make difference)
3. Tube output (maybe it as big as reclock with good tubes)

So I think that noise numbers are not as important (after a certain level) as the load.
Still reading the thread for the power options.
As always will appreciate any enlightenment.

Has someone used Sjostrom psu (SSR04)? It has low output impedance and 0.9 uV noise
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Old 19th September 2018, 10:38 PM   #6674
karahana is offline karahana
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Smooth dancer thanks for the pic! It is great psu though costly. I know the magic those jbls can give))
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Old 19th September 2018, 10:44 PM   #6675
karahana is offline karahana
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Juancho! May i ask you to send some pics of your dac? Did I understand correctly that you have compared sowters cinemags and capasitors with valve output and preferred valves? What was the difference that you heard?
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Old 19th September 2018, 10:47 PM   #6676
juancho is offline juancho  United Kingdom
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I agree but tube output with JJ802s beats reclocking
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Old 19th September 2018, 10:49 PM   #6677
juancho is offline juancho  United Kingdom
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Originally Posted by karahana View Post
Juancho! May i ask you to send some pics of your dac? Did I understand correctly that you have compared sowters cinemags and capasitors with valve output and preferred valves? What was the difference that you heard?
Correct. Valve output is an easy win over Sowters for me. The music flows better, sounds more organic and has better drive and dynamics. Valve output also works really well with two boards. I'll do some pictures in the next days
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Old 19th September 2018, 11:01 PM   #6678
karahana is offline karahana
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Thank you! As i was quite impressed that sowters were considered better choice than tubes, i thought it should at least as good, may be the dac itself has organic analog sound. so.. Volume control is a nice addition though.
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Old 20th September 2018, 06:13 AM   #6679
mbrennwa is offline mbrennwa  Switzerland
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Quote:
Originally Posted by karahana View Post
Thank you! As i was quite impressed that sowters were considered better choice than tubes, i thought it should at least as good, may be the dac itself has organic analog sound. so.. Volume control is a nice addition though.
How many DAC boards do you have in your DDDAC? I'd guess that you need at least 4 boards to get sufficient drive capacity (low ouput impedance) for the next stage. Also, a transformer volume control (TVC) helps a lot to improve output impedance (as long as it is not set to max. volume).
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