Non-OS 44.1K residue

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#21
If it helps any, I just bought a non-oversampling dac (see http://ack.dhs.org) and I hear no problems in the high end which the supersonic image. In fact, the sound is very sweet in the top end and lacks the harshness that I find in a lot of digital sources that don't use a Non-oversampling dac.

I am using an AKSA 55 amp and Vienna Acoutics speakers, and like it was mentioned above somewhere, it IS system dependent. I heard cases where the supersonic image that gets sent to the amp can cause it to oscillate. I'm glad mine doesn't have a problem with this.

Definitely try it out because it may really be worth your effort.

Good luck,

Vinnie
 
#22
Hi John,

Very cheap and effective option: TDA1543 (can be interfaced without problems to CS8412 and at this moment Reichelt sells them for 0.75EUR), three resistors (I/V and Vref), two output coupling caps, two styrene/mica shunt caps and additional (cheap) two resistors to ground are all you need else than receiver and supply. This gives the sound I prefer to my modified Marantz CD63SE. Comparing to SM5842/2xPCM63K DAC it lacks some power but is more enjoyable and has a bit better soundstage.

As about TDA1541A (3EUR at Reichelt at the moment), I am working a few weeks on the PCB for it… sometimes I think that those people who designed it (its pinout at least), had a wish to torture those who want to make a proper ground and other routing. This chip demands an active analog stage, more supply lines etc… so this project is more time consuming. Of course, everything can be done fast, but this would raise the chances to get unsatisfied with the result…

Pedja
 
#23
Vinnie,

Thank you for your words of encouragment. I don't think there is any chance of my amp oscillating, thankfully. I am only worried about "birdies".

Pedja,

I am very used to PCB layout myself (though I wasn't going to use one for this), and what I would say is that you must consider the lead length INSIDE the chip too. When you think that the wire inside is very thin also, you realise that your track length problem is not so great.
How many copper layers will you use? I was thinking of using double sided laminate + hardwiring. Are you going to make your PCB commercially available?

Cheers,
 
#24
dhaen said:
I am very used to PCB layout myself (though I wasn't going to use one for this), and what I would say is that you must consider the lead length INSIDE the chip too. When you think that the wire inside is very thin also, you realise that your track length problem is not so great.
How many copper layers will you use? I was thinking of using double sided laminate + hardwiring.
Click to expand...
Hi John,

I’ll use two layers, with the idea to use top layer as ground plane, so I am trying to move as much as possible traces to bottom layer. This is not so easy since… Look at this. Digital supply pins (26, 28) decouple to pin 14 (Dgnd). Pin 15 decouples to pin 5 (Agnd). Ground sides of the 14 decoupling capacitors should meet undisturbed by the supply currents and should be grounded to analog ground. Analog output signal should be carried out. And not so terrible, but right channel output is at left side and vice versa. And note that some limits exist anyway (say, position of the digital input pins determines something about the chip’s position, incoming ground from the receiver/reclocker should go to the 1541’s digital ground etc).

dhaen said:
Are you going to make your PCB commercially available?
Click to expand...
Not for now, but this might change later this year. I have a plan to try a few I/V stages, so for now I settled to make a PCB for receiver/reclocker/dac chip only. Important fact is that the reclocker on the PCB is Elso’s intellectual propriety. Btw, I do have a few spare PCBs for my TDA1543 DAC, but at the moment I do not know any sensible/payable way for the international shipping.

Pedja
 

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#25
Koinichiwa,

dhaen said:

I am very used to PCB layout myself (though I wasn't going to use one for this), and what I would say is that you must consider the lead length INSIDE the chip too. When you think that the wire inside is very thin also, you realise that your track length problem is not so great.
How many copper layers will you use? I was thinking of using double sided laminate + hardwiring. Are you going to make your PCB commercially available?
Click to expand...

First, what fish...?

Second. The TDA1541 DAC I designed a while back aquired a PCB a while back. Due to the requirement of most people for a full or at least partial kit and loads of handholding (Where do I buy TDA1541, where do I buy CS8412, where do I buy resistors, how do I hold a soldering iron....) the PCB was never made commercially available as it was intended. You can see this here:

http://www.ndh.net/home/kboehm/T-DAC-P1.htm

An externally hosted image should be here but it was not working when we last tested it.


This PCB is the result of co-operation between myself and Klaus, a very frustrating process which nevertheless resulted in a layout that is not miles away in perfomance from my hardwired version of the circuit (yes, I build the whole thing fully hardwired)....

http://www.fortunecity.com/rivendell/xentar/1179/projects/adagio/Adagio.html

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


The hardwired Digital circuit is one of the Aluminum boxes (internally clad with copper), the I/V, Transformers and Filters in the other.... All is mounted on a C37 Lackquered wooden section for "tone"....:idea:

Anyway, I hope this gives some ideas.

All that said, I would recommend to build a "quick & dirty" TDA1543 all passive NOS DAC, just to get "your feet wet". It is brutally simple, can be made to work in an hour or two and for what it is sounds rather good.

I build the above TDA1541 DAC NOT because I did not enjoy my Kusonoki DAC (see schematic below), but because I felt that for the then upcoming "DAC Shootout" event of our DIY HiFi Club I needed something a little more "High End"....

An externally hosted image should be here but it was not working when we last tested it.


Sayonara
 
#26
So long and thanks for all the fish....

Thorsten,

Firstly:
The fish comment was a joke first posted to a thread of yours by Tiroth regarding your mis-typing "konnichiwa" [this(good)day] as "koinichiwa" [a pair of fish-or suchlike]. 😉

Secondly:
Thank you for putting such an effort into your reply. No, I don't need any handholding thank you.😎 For me, other peoples projects are for inspiration and research, I always "do it my way":note:

Kampai:drink:
 
#27
Re: So long and thanks for all the fish....

Konichiwa,

As for the Fishies, I have the phonetic notations for rendering japanese different in English and German and even several possible ones in English.... ;-)

dhaen said:
Thank you for putting such an effort into your reply. No, I don't need any handholding thank you.😎
Click to expand...

I did not imply you did. A lot of others however asked for that to be included in the price of the boards... So IF you want the PCB's, why don't you mail Klaus and ask if has a few for sale? I had a few but gave away all but one set, which is nearly complete.... ;-)

dhaen said:
For me, other peoples projects are for inspiration and research, I always "do it my way":note:
Click to expand...

Sayonara
 
#28
Right...that's done it!

Hi,

Had to order a bundle of TDA1541A from Reichelt as their minimum order for us foreigners is 50 Euro. Their German language order form is damn hard work:headbash: Please don't anyone tell me there is an English form!
If anyone in the UK wants any at cost + postage please email me. I'll put the spares up on the trading post when I actually receive them. They'll go eventually....:wave2:


Thorsten,
Thanks for the info. Yes, I might ask Klaus.
BTWit's Kon-nichi-wa. You MUST have the extended double-n consonant. It's like that in the kana. 🙂


Cheers,
 
#29
Hi,

It's like that in the kana.
Click to expand...

When the wine is in the manna the wisdom is in the kana?😉

I feel you'll loose your 1541s easily, their pretty popular around here and are viewed as the best building block for a high-end DAC.

Still curious to see what you're going to concoct with that one...:mafioso:

Cheers,😉
 
#30
Re: Right...that's done it!

dhaen said:

Had to order a bundle of TDA1541A from Reichelt as their minimum order for us foreigners is 50 Euro. Their German language order form is damn hard work:headbash: Please don't anyone tell me there is an English form!
Click to expand...


Hiya,
I just had this problem today aswell. I was ordering 4 x TDA1543. I got them from mail ordered from London (Crinklewood Electronics ). They were £1.50 each! I still had to overcome a language barrier - you'll see what I mean if you ever call - but very helpful! 😉

Hope this helps!
Gaz
 
#32
fdegrove said:
Hi,



When the wine is in the manna the wisdom is in the kana?😉

I feel you'll loose your 1541s easily, their pretty popular around here and are viewed as the best building block for a high-end DAC.

Still curious to see what you're going to concoct with that one...:mafioso:

Cheers,😉
Click to expand...


Frank, youll have to stay curious,😉 as for the time being it's still speculation. The only things I'm committed to are CS8412 and TDA1514A, and non-OS.
 
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