Mini Dac TDA1543 X 4 NOS - Page 11

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

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 

Quote:

Originally Posted by burgunder 

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.

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

Shit , bad news :(

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

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

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 

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

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

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...

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 

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...

Quote:

Originally Posted by ardilla 
 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

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

What do you think about the heat sink? 
 

Quote:

Originally Posted by T.IIZUKA 

 

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. 

 

 

I was anxious of heat radiation, too. 

The heat sink for the memory is examined. 

 

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