TDA1541A and the 14 decoupling caps

[Bricolo]

What is the purpose of those caps?

I'm looking for inexpensive ones to use for that, something that costs less than 1$ per cap.

Is the 0.1uF value important? I saw that Thorsten uses a 15uF oscon on the MSB, why not using large ones on each pin?

 

[tbla]

for best compromise use 1 uF all over - best quality you can afford......

 

[Bricolo]

but why 1uF instead of the 0.1uF in the datasheet? What exactly are these caps doing?

 

[Tube_Dude]

What exactly are these caps doing?

Salut , Bricolo!

These capacitors are for smoothing the ripple caused by the periodic switching of currents in the chip..in the seven most significant bits and are externally connected.

At frequency that the DAC work i see no need to go for more that the capacity that philips give in the data sheet..

Au revoir!

 

[Peter K]

I'm looking for inexpensive ones to use for that, something that costs less than 1$ per cap.
QUOTE]

Like Peter Daniel I have used BG 0.1 uF/50V NX-HQ caps which costed me Euro 1,39 a piece. They seem to work fine but I have not compaired to other types.

Best regards,

Peter K

 

[Bricolo]

This is too expensive for me

 

[tbla]

mr. walt jung did an investigation years ago in the pooge articles, and found that 1 uF was the "best" solution - he used polycarbonat caps......bricolo - WIMA mks4, 1 uF will suit your wallet just fine.

 

[Peter Daniel]

I used those green ROE 1u caps in other player and they also sounded good.

 

[Bricolo]

I used those green ROE 1u caps in other player and they also sounded good.

The ones that are on the picture you took from the S2 dac?

 

[Peter Daniel]

Yes. I had BG there before and I removed them to use in a different DAC, and it seemed like those green ROE sound smoother and definitely not worse.

 

[Bricolo]

Where can I find more about those Green ROE caps?

I've tried on google, but it seems that ROE has no website, or ROE isn't the brand name

 

[jean-paul]

The brandname is Roederstein.

 

[Bricolo]

The brandname is Roederstein.

Thanks for the info
Another Vishay company

But they don't have any "green" cap, at least not maned so
http://www.vishay.com/company/brands/roederstein/

 

[Peter Daniel]

It actually says ERO on those caps and number is MKT1818. You might also try Wima MKP series, but they are bigger.

 

[Bricolo]

It actually says ERO on those caps and number is MKT1818. You might also try Wima MKP series, but they are bigger.

The local store here has only Wima MKS2, 3€ each :/

 

[tbla]

way to expensive.......

 

[Bricolo]

and the Wima MKP cost 2€, but not at the local store, I would have to order them.

I can have others here:
http://www.radiospares.fr/cgi-bin/b...scape&3247828214=3247828214&catoid=-946358211

but there are so many different types, I'm totally lost

 

[Bricolo]

Do someone know about Siemens MKTs?

http://www1.fr.conrad.com/scripts/w...=4&price=Aucun+prix+n%27a+%e9t%e9+trouv%e9%2e

they are cheap, and look even more cheap.

 

[tbla]

i'm using this....

169-1540

and its not polyester but polycarbonat....

 

[Bricolo]

i'm using this....

169-1540

and its not polyester but polycarbonat....

Yep, they are listed as metallised polycarbonat

what's better?