We are always interested in comparisons😉
Try to compare a single chip with 5V supply and 1K resistors with 4 chips in parallel at higher supply and appropriate resistors.
Try to compare a single chip with 5V supply and 1K resistors with 4 chips in parallel at higher supply and appropriate resistors.
Re: values
Koinichiwa,
See the quotes posted by JP. I'd also be tempted to use fairly large Values in Os-Con's, WHERE I TO USE THIS (which I would not).
I thought by now it should be clear that the resistor ahead of the TL/LM431 is absolutely and only dependent upon the Voltage and needs to be calculated every time. I gave several examples how to calculate, you should be able to take it from there.
My recommendation would still be to use 12V Batteries and use suitable values of series resistors, or even better constant current sources, set to pass twice the rated supply current of the pin regulated.
So, forget 6V Batteries, they are not really suited.
Use 12V Batteries and TL/LM431 Shunts and LM317 (TO92case) IC's connected as current source in series with a suitably high value Choke (say 10mH+ from the Panasonic lineup), rather than trying to work around low battery voltage.
Sayonara
Koinichiwa,
RichardJones said:
See the quotes posted by JP. I'd also be tempted to use fairly large Values in Os-Con's, WHERE I TO USE THIS (which I would not).
RichardJones said:
I thought by now it should be clear that the resistor ahead of the TL/LM431 is absolutely and only dependent upon the Voltage and needs to be calculated every time. I gave several examples how to calculate, you should be able to take it from there.
My recommendation would still be to use 12V Batteries and use suitable values of series resistors, or even better constant current sources, set to pass twice the rated supply current of the pin regulated.
So, forget 6V Batteries, they are not really suited.
Use 12V Batteries and TL/LM431 Shunts and LM317 (TO92case) IC's connected as current source in series with a suitably high value Choke (say 10mH+ from the Panasonic lineup), rather than trying to work around low battery voltage.
Sayonara
Sorry for the above post, I was testing how to attach an excel file. In which I am so far unfortunately not succesfull.
Peter
Peter
Hi Peter,
That won't work unless you can host it somewhere on the web and embed it here.
Cheers,😉
That won't work unless you can host it somewhere on the web and embed it here.
Cheers,😉
Tested my TDA 1543 DAC, I hope I did it the right way!
I did some testing on my TDA1543 DAC based on the input I received last week.
I have tested the following:
1) 1 to 4 parallel TDA 1543, Uin 5 to 8 V
2) Tested several resistor types as I/V converter
First I calculated the different Rref and RI/V resistor levels for all situations between 1 to 4 parallel TDA1543 and Rref for every Uin between 5 and 8 VDC (in steps of 0.5V). I was intending to post a copy of the excel sheet, since this is not possible I hereby post a sumary of my results.
Connected equipment:
-CDPRO2, I2S directly into the DAC, interlink is 60 cm UTP CAT5
-SDS Labs DIY headphone amplifier
-Sennheiser HD580 with DIY cable
The DAC is build with the TNT Convertus as reference, no reclocking used yet.
MY personal results on parallel chips:
1 x TDA 1543 @ 5V, Smooth sound but in my opinion a little flat.
1 x TDA 1543 @ 8V, increased dynamics compaired to the lower voltages which was to be expected.
2 x TDA 1543 @ 7V compaired to single chip increased dynamics, better placing of instruments. Minor difference between 5 and 8 VDC Uin.
3 x TDA 1543 @ 7V, very dynamical sound, a little tiring sound. loosing some detail in the bass. No real difference between 5 and 8 VDC Uin.
4 x TDA 1543 @ 7V, dynamics sound is over the top, quit tiring sound, loosing a lot of detail in the lows. No real difference between 5 and 8V.
My personal favorite out of all tested combinations is as follows:
2 x TDA 1543
Uin= 7.5V
Rref= 680 Ohm
RI/V= 1k Ohm
This set-up is in my opinion the best combination: dynamical but not overdue with very good detail and no distortion as far as I could hear.
In my opinion the DAC does very well on "no nonsence music" like Paolo Conto, Tracy Chapman Lee Shankey Group etc. When the music becomes more "smoother" like This Mortal Coil I am not yet sure. I think I can discribe the sound of this DAC best as very direct, there seems to be nothing in between the music and the listener.
Different types of RI/V:
I have tested the following types with the following results(personal opinion):
Standard metalfilm: Missing detail in low and middle , high was good
Kiwake: Missing detail in low, middle and high quit mellow
Ricken: low, middle and high detailed and nicely balanced
VTC Tantalum: Low and high oke, middle missing
In my opinion the Ricken is compaired to the other types I've tested the best one.
So far my results.
Peter
I did some testing on my TDA1543 DAC based on the input I received last week.
I have tested the following:
1) 1 to 4 parallel TDA 1543, Uin 5 to 8 V
2) Tested several resistor types as I/V converter
First I calculated the different Rref and RI/V resistor levels for all situations between 1 to 4 parallel TDA1543 and Rref for every Uin between 5 and 8 VDC (in steps of 0.5V). I was intending to post a copy of the excel sheet, since this is not possible I hereby post a sumary of my results.
Connected equipment:
-CDPRO2, I2S directly into the DAC, interlink is 60 cm UTP CAT5
-SDS Labs DIY headphone amplifier
-Sennheiser HD580 with DIY cable
The DAC is build with the TNT Convertus as reference, no reclocking used yet.
MY personal results on parallel chips:
1 x TDA 1543 @ 5V, Smooth sound but in my opinion a little flat.
1 x TDA 1543 @ 8V, increased dynamics compaired to the lower voltages which was to be expected.
2 x TDA 1543 @ 7V compaired to single chip increased dynamics, better placing of instruments. Minor difference between 5 and 8 VDC Uin.
3 x TDA 1543 @ 7V, very dynamical sound, a little tiring sound. loosing some detail in the bass. No real difference between 5 and 8 VDC Uin.
4 x TDA 1543 @ 7V, dynamics sound is over the top, quit tiring sound, loosing a lot of detail in the lows. No real difference between 5 and 8V.
My personal favorite out of all tested combinations is as follows:
2 x TDA 1543
Uin= 7.5V
Rref= 680 Ohm
RI/V= 1k Ohm
This set-up is in my opinion the best combination: dynamical but not overdue with very good detail and no distortion as far as I could hear.
In my opinion the DAC does very well on "no nonsence music" like Paolo Conto, Tracy Chapman Lee Shankey Group etc. When the music becomes more "smoother" like This Mortal Coil I am not yet sure. I think I can discribe the sound of this DAC best as very direct, there seems to be nothing in between the music and the listener.
Different types of RI/V:
I have tested the following types with the following results(personal opinion):
Standard metalfilm: Missing detail in low and middle , high was good
Kiwake: Missing detail in low, middle and high quit mellow
Ricken: low, middle and high detailed and nicely balanced
VTC Tantalum: Low and high oke, middle missing
In my opinion the Ricken is compaired to the other types I've tested the best one.
So far my results.
Peter
Re: Tested my TDA 1543 DAC, I hope I did it the right way!
If I'm not mistaken, you can zip your excell file and attach the zip file to a postPeter K said:
Please see the post of Kuei some pages ago, he explains all about calculating resistors/currents etc:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=5798&perpage=15&pagenumber=9
http://www.diyaudio.com/forums/showthread.php?s=&threadid=5798&perpage=15&pagenumber=9
caps etc
Hi,
how do small value polyester caps comapre to low vlue polypropylene's for bypassing etc, which are better?
I have seen polyester and polyester metalised and also polypropylene's metalised etc.
Just wondering whihc are better to use for values like 0.1 uf to bypass electoro caps.
Thanks
Raja
Hi,
how do small value polyester caps comapre to low vlue polypropylene's for bypassing etc, which are better?
I have seen polyester and polyester metalised and also polypropylene's metalised etc.
Just wondering whihc are better to use for values like 0.1 uf to bypass electoro caps.
Thanks
Raja
http://www.diyaudio.com/forums/showthread.php?s=&threadid=8550&highlight=styroflex
Use the Search function on:MKP, Styroflex etc. Lots of threads about capacitors...
Use the Search function on:MKP, Styroflex etc. Lots of threads about capacitors...
phase of TDA1543 output
Hi there,
Would anyone here advise me about the phase of the TDA1543 output? Some body told me that the output of TDA1543 is inverted phase, is this true?
Hi there,
Would anyone here advise me about the phase of the TDA1543 output? Some body told me that the output of TDA1543 is inverted phase, is this true?
Hi,
It's the TDA that inverts polarity OS or non OS.
Digital filtering isn't going to change that.
Hope that clarifies it a bit,😉
It's the TDA that inverts polarity OS or non OS.
Digital filtering isn't going to change that.
Hope that clarifies it a bit,😉
My post wasn't clear enough, it was even confusing. This DAC with passive I/V inverts phase like most DAC chips do ( os or non os). When you use an opamp for I/V instead of a resistor it will invert phase again and everything will be in phase at the end.
So it depends on how you do I/V. You can build a discrete output stage that inverts phase....
😕
So it depends on how you do I/V. You can build a discrete output stage that inverts phase....
😕
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