AFAIK the production of these chips stopped in the early nineties, I also have some 8840 chips and the S1 I just received are labelled 8940.
That's why Reichelt doubled the price
The S2 series was made in 1997 in a different factory, but that's another story.
Cheers
Andrea
That's why Reichelt doubled the price
The S2 series was made in 1997 in a different factory, but that's another story.
Cheers
Andrea
stefanobilliani said:
I would be interested for this version. I have a such a DAC waiting for an outputstage.
Any plans for making more than one pcb ? 😀
Greetings,
Andypairo said:
Correct of course, it was early when I posted. 1988 anyhow. Yes Till, Reichelt and all others sell chips that were produced 16 years ago ( + or - some years ).
TDA1541A is like Telefunken E88CC. A lot of variations and production dates 😉
jean-paul said:
Do you know when the production started/stopped?
My datasheet for the TDA1541A is from 1991 (1985 for the non A), but I don't think that it's the beginning
I am not sure but I think it started 1985 and stopped in 1994. Bernhard has S1's from 1996 though as he posted in this thread. Apart from S2's from 1997 I've never seen newer A and A-S1's than 1994 ones. Same for SAA7220P/B.
jean-paul said:
Really ???
jean-paul said:
Ok.
The A S1 from 880 has best values. Lowest... But K2 and K3 are too low for my taste.
And S1 from another player has worst values of all S1 I have.
So there are no conclusions at all.
Why S1 from players do not have crown but sticker ?
jean-paul said:
IMHO you still have to learn a lot.
Every DAC chip sounds different and measures different.
Philips did not select for good distribution of harmonics, just for good THD. See data sheet.
That means, S1 just means average of harmonics is good.
Left and right channel of a DAC may look equal on a distortion analyzer, but not on a spectrum analyzer. Same for amps.
If you have a distortion analyzer like HP334, what it tells you is useless.
Amplifiers with same THD values may sound very different. Again because those THD values tell nothing about low or high or even or odd order harmonics.
This should be easy to understand. But some people say it's black magic. Or even worse they say measurements are useless.
But it is just a matter of measure the right thing and interpretation.
There is a reason and an explanation for everything, and no such thing like Voodoo.
Did you ever use a spectrum analyzer ?
It would be nice work togheter for it .Next days I will post my arrangements .guido said:
It lacks the output capacitor , but the circuit is the right one . Also with irfp044.Bricolo said:
Ok, that was expected but I thought taste was not objective. Nuff said.
It seems this thread serves no purpose then.
We are not going to debate things we both agree on do we ?
I really do ( honestly ) but please excuse me, I want to listen to music now and I don't want to disturb your valuable hours in front of your analyzer. I'll be happy to learn from the informative threads you open once in while.
I think I am not the only one that has to read and learn some more ( don't we all ? ) :
http://www.diyaudio.com/forums/showthread.php?s=&threadid=31817
http://www.diyaudio.com/forums/showthread.php?s=&threadid=31388&highlight=
Today I tested 2 1541 parallel in a CD650 non os.
Distortion seems to middle.
-51 & -56 = -53.
No idea yet if it is reduced if distortions of each single chip have the same value.
By accident I found a way to make distortion fall constantly with higher order and more or less cancel even orders, but overall distortion is higher.
Sounds not bad.
Something for distortion lovers
Distortion seems to middle.
-51 & -56 = -53.
No idea yet if it is reduced if distortions of each single chip have the same value.
By accident I found a way to make distortion fall constantly with higher order and more or less cancel even orders, but overall distortion is higher.
Sounds not bad.
Something for distortion lovers
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