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Mini Dac TDA1543 X 4 NOS - Page 10

post #136 of 947

 

Sonically - I think the stock PSU actually does the job very well. Wouldn't really bother about upgrades...

 

If you've read the thread, you can see that I had some trouble with my sample. However, before it broke down, I ordered a new one, which now is awaiting PO pick up :-) The one that malfunctioned is now sent back to china, seller said to repair or send a new one. We'll see. 

 

I've been thinking about this PSU, but the prime reason is that it has an on off switch and that I can connect several muse dacs to it useing a Y-DC cable. Haven't tried it though. 

 

BTW. I opened up the malfunctioned muse dac. On the circuitboard it said iput 9-13V. So I inserted a 9V/1.2A powersupply, but the dac started to smell funny pretty fast. It did not with the stock 12V. According to my understanding of things, 9V/1.2 ampere should work? As you understand, I know very little about the current-stuff, Volts and Ampere etc. Read this thread's earlier posts, or just ask SPWild :) 

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post #137 of 947

Hmmm very strange. 9V should be safe.I think your DAC had some short circuit earlier. Or maybe source of malfunction and damage DAC is stock supply.It's lightweight , cheap-looking and probably NOT STABILISED . If put out non-stabilised DC over 12-13 V that's may be why your DAC was overheated and finally damaged .

Yes, I have seen Muse power supply but for now its too expensive for me.

I have found this.

http://www.cyfronika.com.pl/t/product_info.php?products_id=19015

stabilised, trafo (not impulse) power supply 12V 1500mA - plug DC2.1/5.5   for about 20 euro

 

Sorry for my english. I'm not native english speaker :)

post #138 of 947

Quote:

Originally Posted by viatraco View Post

Hmmm very strange. 9V should be safe.I think your DAC had some short circuit earlier. Or maybe source of malfunction and damage DAC is stock supply.It's lightweight , cheap-looking and probably NOT STABILISED . If put out non-stabilised DC over 12-13 V that's may be why your DAC was overheated and finally damaged .

Yes, I have seen Muse power supply but for now its too expensive for me.

I have found this.

http://www.cyfronika.com.pl/t/product_info.php?products_id=19015

stabilised, trafo (not impulse) power supply 12V 1500mA - plug DC2.1/5.5   for about 20 euro

 

Sorry for my english. I'm not native english speaker :)

 

Quote: stabilised, trafo (not impulse) power supply

 

Is this the same as "Linear" vs "Switching Mode" PSU?

 

I have also been thinking that the PSU might be the reason for the overheating, but using the 9V didn't support that thesis...

 

The 9 V I tried was a (supposedly) higher quality one - (but this is the one that made the Muse smell funny...)

 

..... EDIT: Picture removed to avoid confusion :-))

 

PS:Do not excuse your english - it's quite comprehensible. There are lots of us non-native-english-speaking headfiers around here  ;-)


Edited by ardilla - 1/26/11 at 4:00pm
post #139 of 947

Look at the picture.Your 9V adaptor is AC/AC !! :) Output should be DC.Probably you have damaged DAC.

post #140 of 947

Hahaha! Hope my ebay seller do not read this thread (he promised me a new sample)

 

- but anyway - the DAC didn't work before I tried this, so, the AC/AC wasn't what killed it in the first place. 

post #141 of 947

Back to your question:

I don't know english name for this stuff but trafo (transformer) supply is recommended for audio components.When i said IMPUSE I meaned power supply like wallwart mobile phone adaptors or laptops adaptors.This is diffrent build technology.Muse power supply from your link is trafo supply (you probably called linear)

Supply included to Muse DAC is definetly impulse and non-stabilised.

Hmmm stabilised means that DC has minimal amplitude that is better.DC should be constant but in fact non-stabilised adaptors doesn't produce constant.

Maybe I'm wrong but I remember this is something like that :))

post #142 of 947

Something like this (SMPS is Switching Mode Power Supply, PSU is trafo/linear, SLAP is battery)

 

Current variation in power supplies

(from http://www.itemaudio.co.uk/kingrex_power_supplies.html )

post #143 of 947
Originally Posted by ardilla View Post

 

from http://www.itemaudio.co.uk/kingrex_power_supplies.html

 

http://www.itemaudio.co.uk/coconut_audio.html [:docasmir]

 

the TeraX2 PSU could be an option too, as it's cheap and looks pretty well built. I should have one soon.

post #144 of 947

LOL! Really love the Coconut Audio product's - especially Exeres 'Dolphin' Ear Resolution Upgrade

 

Are you referring to the Teralink X2/X1 PSU? one? It is 8V output.. http://www.head-fi.org/forum/thread/512389/mini-dac-tda1543-x-4-nos/45#post_7001660

 

But then, it ays here that it is adjustable? Don't know how that affectts the Ampere output, though..

 

 

Teralink-X2 / X1 Linear Low noise Power Supply 

This is Teralink X2 or X1 USB converter power supply unit ,and this power supply can use in other DC 8V audio product.

Features off this power supply :

1.EMI AC filter. 
2.EI Transformers. 
3.CLC Low ripple DC filter. 
4.MJE15030 , BC550  low noise linear voltage circuits 
5.And high accuracy reference voltage output. 
6.STTH8S06 fast diodes. 
7.High quality Panasonic FM caps. 
8.DC output : 0.25V -10 V adjust ( Default DC 8V 1A)
9.AC input :AC 115 or 230V
10.Aluminum body , size is W101 x D115 x H46 mm
11.Hard plastic frosted plastic whitle panel.  
12.Includes DC cable  for connect Teralink - X2 / X1
13.Weight :700g 1pc 
14.High level of silent background and detailed sonic performance can be achieve

post #145 of 947

 

I also bought a MINI DAC.
 
Noise does not appear.
The sound is better than expected.
TDA1543 fever was more than expected.
 
Summarizes the internal configuration.
 
TDA1543MINIDAC.jpg
 
Correct.
4.7k ohm resistor at the output is not. The answer is 47k ohms.
Misinterpret the color code.

Edited by T.IIZUKA - 2/11/11 at 4:00pm
post #146 of 947

Hi T.IIZUKA!

 

 

Welcome  :-) Thanks for the picture. 

 

What do you mean by "TDA1543 fever was more than expected"?

 

 
Also - have you got any thoughts on a PSU-upgrade? Is anything between 9-13V OK? 

Quote:
Originally Posted by T.IIZUKA View Post

 

I also bought a MINI DAC.
 
Noise does not appear.
The sound is better than expected.
TDA1543 fever was more than expected.
 
Summarizes the internal configuration.
 
TDA1543MINIDAC.jpg
post #147 of 947

 

>>What do you mean by "TDA1543 fever was more than expected"?
 
It means the heat sink of TDA1543 considerably has heat. 
 
PSU uses the standard accessory. 
PSU schedules to make a change of. 
 
Moreover, I want to change the I/V conversion to OPAMP.
post #148 of 947

OK - keep us posted when you mod the i/v stage!

post #149 of 947

Some say if you change passive I/V to opamp you will loose charm of TDA :) We will see...

post #150 of 947
Quote:
Originally Posted by viatraco View Post

Some say if you change passive I/V to opamp you will loose charm of TDA :) We will see...



 

Thinks so.
Trial fitting for that purpose. And audition.
 
2011_01_31_022537.JPG
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