Pushing the limits of TDA1543 NOS DAC - Page 4 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Audio Sector

Audio Sector Kits & PC boards from AudioSector

Reply
 
Thread Tools Search this Thread
Old 27th April 2011, 07:16 PM   #31
le´flu is offline le´flu  Germany
diyAudio Member
 
Join Date: Mar 2004
Location: Hoexter
Hello Peter,

thanks allot for sharing. Just some questions at the moment...
right at the beginning, what brand is the black five-pole connector from
psu to main circuit? And What are those bib black ´lytics on the DAC.
board?

Greetings ulf
  Reply With Quote
Old 27th April 2011, 07:27 PM   #32
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
The connectors are from Switchcraft (Multi-Con-X), digikey part# SC1221 (for female cable mount).

The caps are BG FK 2200/35 and BG N 1000/50, the latter can be replaced with BG N 470/16
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 27th April 2011, 07:34 PM   #33
le´flu is offline le´flu  Germany
diyAudio Member
 
Join Date: Mar 2004
Location: Hoexter
okay, GREAT...thanks allot

As my whole System is unbalanced, would you recommend building
the balanced version and use it unbalanced?
Why are you not using any output-caps in your version?

Greetings Ulf

P.S. forget about the stupid questions about outputcaps...found all the answers :-(

Last edited by le´flu; 27th April 2011 at 07:54 PM.
  Reply With Quote
Old 27th April 2011, 07:56 PM   #34
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
If the system is unbalanced, there's no reason to built the DAC balanced, UNLESS you are using TVC which can convert balanced signal to unbalanced with the advantage of eliminating coupling caps because of zero differential offset (the 4V outputs from a DAC cancel each other when connected to primaries of the transformer)

My amps are also unbalanced.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 27th April 2011, 08:05 PM   #35
le´flu is offline le´flu  Germany
diyAudio Member
 
Join Date: Mar 2004
Location: Hoexter
Okay...
well i don´t have TVC but an Valve-based unbal- LinePre
But there is the possibility to use an input from bal. via
inputtransformer to unbal. Would that be an upgrade over
just using unbal. DAC directly into the unbal. pre?

Greetings ulf

P.S. What do you thing..how many TDA will be needed to
find a matching pair for using the sym. DAC
  Reply With Quote
Old 27th April 2011, 08:09 PM   #36
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
I think transformer may be introducing as much coloration as quality caps. It's really hard to say what's better unless you compare it directly.

The guy for whom I converted DAC in post# 21 still raves about it and it's unbalanced DAC.

I sort chips in a circuit and takes at least 20 pcs to find a reasonable match.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 28th April 2011, 05:51 AM   #37
le´flu is offline le´flu  Germany
diyAudio Member
 
Join Date: Mar 2004
Location: Hoexter
Just because i´m curious, Peter at post 24 what for is LED
S1 S2 and p on the front?

Greetings ulf
  Reply With Quote
Old 28th April 2011, 10:58 AM   #38
diyAudio Member
 
Join Date: Jan 2004
Location: Brazil
Quote:
Originally Posted by Peter Daniel View Post
Commercial or not, any input is useful and I appreciate your advice anyway. I might even try it one day.
Yes, try it, I have a correction to what I wrote earlier though. A single inverter might be needed as well. But the Tent clock output goes directly to the BCK of tda1543, which is the jitter critical input.

I will draw a schematic later.

Best,
Alex

Last edited by Alexandre; 28th April 2011 at 11:02 AM.
  Reply With Quote
Old 28th April 2011, 12:04 PM   #39
diyAudio Member
 
Join Date: Feb 2002
Location: Canada
Quote:
Originally Posted by Peter Daniel View Post
I think transformer may be introducing as much coloration as quality caps. It's really hard to say what's better unless you compare it directly.

The guy for whom I converted DAC in post# 21 still raves about it and it's unbalanced DAC.

I sort chips in a circuit and takes at least 20 pcs to find a reasonable match.
It would be interesting to see if Lundahl or Jensen had any transformers that would convert balanced to unbalanced without coloring the sound.

Regards,
Dan
  Reply With Quote
Old 28th April 2011, 01:51 PM   #40
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
The main reason I'm using transformer is because it is also my preamp. I mentioned it already that I can't imagine better passive line stage than TVC: it adds gain, converts balanced to unbalanced, unbalanced to balanced, allows phase reversal and of course, attenuates. There are kits available with stepping motors that allow adding remote control function. It also sounds better than most active preamps out there, if system is set up properly.

Jensen or Lundahl are certainly fine, but then you need additional line stage, which increases complexity and certainly affects the sound.

My preamps are based on S&B TX102 which are not available for diy any longer, however, I also tried Sowter and it seems as good as S&B.

I've built one such preamp for a local guy (using Sowter 1035) and he replaced his AR Ref 3 with it. Recently he asked me to build another one.

1035 offers balance control, if that is not needed, then 9395 would be a good choice: SOWTER ATTENUATOR TRANSFORMERS TVC VOLUME CONTROL

Those are probably not much more expensive than Lundahl or Jensen, but offer so much more...
Attached Images
File Type: jpg pre.jpg (194.6 KB, 2296 views)
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

Last edited by Peter Daniel; 28th April 2011 at 02:17 PM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: NOS TDA1543 DAC 2A3SET Swap Meet 0 24th March 2011 07:10 PM
Pushing Aleph P to limits - Passive Tri-amp Alves Pass Labs 4 12th September 2006 01:56 AM
TDA1543 and CS8412 NOS DAC Igla Digital Source 3 7th March 2006 07:27 PM
Nos Tda1543 Dac. IpsilonSound Digital Source 0 4th June 2004 06:25 PM
TDA1543 nos dac question... setmenu Digital Source 13 2nd June 2004 12:03 PM


New To Site? Need Help?

All times are GMT. The time now is 09:41 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2