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Mini Dac TDA1543 X 4 NOS - Page 11

post #151 of 935

Just add a switch so you can change between the the passive and the active I/V.

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post #152 of 935
Quote:
Originally Posted by burgunder View Post

Just add a switch so you can change between the the passive and the active I/V.



 

In the same case?
Please if you have introduced your circuit diagram.
post #153 of 935


I don't have any diagram but I figured it should be easy for a DIY'er to add a swicth.

Quote:
Originally Posted by T.IIZUKA View Post



Quote:
Originally Posted by burgunder View Post

Just add a switch so you can change between the the passive and the active I/V.



 

In the same case?
Please if you have introduced your circuit diagram.
post #154 of 935

Did anybody compare our muse 4xTDA to one chip version ?

post #155 of 935
Thread Starter 

Well my one died this week...which happens to be the hottest week in Sydney on record or something like that...

post #156 of 935

Shit , bad news :(

Maybe better will be to remove cover and leave for better ventilation.

post #157 of 935

4x, 8x, 16x TDA have heat problem very often. Try one chip version this time.I've read that it gives more smoothness,less dynamic - good for vocals and no overheating problems.

Hmmm maybe cause of 4xTDA dying is shitty power supply. Non-stabilised, non-linear, superlightweight... If suddenly gives higher DC I think it may be dangerous for Muse

post #158 of 935


Bad news :-(((  I've got a new one - but haven't had the time to use it much...  

 

Leaving the cover open seems like a good idea? Or maybe drilling a lot of holes.. 

 

It is printed 9-13V at the DC port on the board. Maybe 9V wouldn't make it so hot??

 

 

Quote:
Originally Posted by SP Wild View Post

Well my one died this week...which happens to be the hottest week in Sydney on record or something like that...

post #159 of 935

guys, check how much the voltage is fed to the tda chip. some designer increase the voltage supply very close to the max limit (8V) to get higher current at the output (and thus higher voltage swing). If the voltage supply is not very well regulated, the ripple (which could be higher than 8V) could be dangerous to the chips

post #160 of 935

My Muse is not hot but noticeably warm. If we put 9v supply instead 12v temperature will be lower ? Giving lower DC output supply without changing component on board will solve the heat problems ? Am I correct ?

As Ardilla said : "It is printed 9-13V at the DC port on the board".

I think 12V is placed because DIYers want to have higher signal output going to preamplifiers.Maybe 12V is good for one chip version but for multiple TDA this voltage is too high and cause problems with overheating...

post #161 of 935

viatraco - How long have you've been using your Muse? Do you keep it on always or pull the plug when you don't play music? 

 

I really know nada about current... Maybe lower voltage will increase the heat for all I know - but it should be worth  try - this is such a terrific little dac!!!!!
 

Quote:
Originally Posted by viatraco View Post

My Muse is not hot but noticeably warm. If we put 9v supply instead 12v temperature will be lower ? Giving lower DC output supply without changing component on board will solve the heat problems ? Am I correct ?

As Ardilla said : "It is printed 9-13V at the DC port on the board".

I think 12V is placed because DIYers want to have higher signal output going to preamplifiers.Maybe 12V is good for one chip version but for multiple TDA this voltage is too high and cause problems with overheating...

post #162 of 935
Quote:
Originally Posted by ardilla View Post
 Maybe lower voltage will increase the heat for all I know
 


Increase not but decrease maybe yes . Your previously problem with 9V as I said, was because power supply you used was AC-AC :)

We will wait for answer from more experience users than you and me :)

I have got Muse 1 month and it is always plugged into the wall

post #163 of 935

 

Upcoming activities. All electrolytic capacitors are exchanged. 
Capacity is matched to the one described in the substrate. 
 
I want to exchange the output resistances. I want the resister with good sound. wink.gif
 
 
I was anxious of heat radiation, too. 
The heat sink for the memory is examined. 
 
rhs03.jpg
post #164 of 935

Sounds great.  It'd be nice with some pictures? 

 

What do you think about the heat sink? 
 

Quote:
Originally Posted by T.IIZUKA View Post

 

Upcoming activities. All electrolytic capacitors are exchanged. 
Capacity is matched to the one described in the substrate. 
 
I want to exchange the output resistances. I want the resister with good sound. wink.gif
 
 
I was anxious of heat radiation, too. 
The heat sink for the memory is examined. 
 
rhs03.jpg
post #165 of 935

T.IIZUKA , do you think that 9V power supply instead 12V will decrease common TDA's overheating ?

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