DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 186 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 5th June 2012, 03:02 PM   #1851
diyAudio Member
 
Join Date: May 2012
Yeah I got the same thing for the coax and l r output.
  Reply With Quote
Old 5th June 2012, 09:38 PM   #1852
F1 FAN is offline F1 FAN  Canada
diyAudio Member
 
Join Date: Jun 2006
There is a 75 ohm resistor across the spdif to ground.Maybe re check with meter in the ohm setting since it may indicate continuity with any thing up to 100 ohms or so.

Last edited by F1 FAN; 5th June 2012 at 09:44 PM.
  Reply With Quote
Old 5th June 2012, 09:44 PM   #1853
bcmbob is online now bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
Thanks F1 Fan, that answer was also confirmed by Dario. I guess I'm O.K. Thanks for your reply.
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 6th June 2012, 07:17 PM   #1854
diyAudio Member
 
Join Date: May 2012
For this DAC, does anyone have any pictures of their upgraded regulators? Does it make a difference? How do I do this?
  Reply With Quote
Old 6th June 2012, 07:34 PM   #1855
diyAudio Member
 
merlin2069er's Avatar
 
Join Date: Sep 2008
Location: Toronto
Blog Entries: 1
Send a message via MSN to merlin2069er
The dac runs on +3.3v (digital side) & +5v (analogue) side. I'll be using STR (super teddy regulators) for each side. Just have to determine where to apply the voltage (and bypass the onboard regulators). Does it make a difference? (Not sure yet.) I'll let you know when I've accomplished this.
  Reply With Quote
Old 6th June 2012, 07:51 PM   #1856
diyAudio Member
 
Join Date: May 2012
Quote:
Originally Posted by merlin2069er View Post
The dac runs on +3.3v (digital side) & +5v (analogue) side. I'll be using STR (super teddy regulators) for each side. Just have to determine where to apply the voltage (and bypass the onboard regulators). Does it make a difference? (Not sure yet.) I'll let you know when I've accomplished this.
Yeah I have been reading about STR's, but I am no electrical engineer, just a hack.... Sooo I have no idea how to apply them correctly. But from my research, I have been hearing good things....

Maybe you can take a look at audio gd's stuff... They have some regulators that look interesting as well as their Op Amp HDAM stuff....
  Reply With Quote
Old 7th June 2012, 02:05 AM   #1857
diyAudio Member
 
Join Date: Dec 2011
Quote:
Originally Posted by slider2828 View Post
For this DAC, does anyone have any pictures of their upgraded regulators? Does it make a difference? How do I do this?
This thread has lots of discussion of various regulators/PSUs that have been tried or proposed with this DAC. Here's some comments and build pics that I've taken notice of (I'm sure list is not complete, but others can chime in if they wish). Hope this helps!

1. Erin, who initiated this thread, identified early that the miniDAC could be improved by modifications to the PSU. “I think it needs a lot more than the supplied 1800uf reservoir capacitors. I intend to build an off board power supply with more capacitance for it. … 22,000uf on the analog power rails before the regulator…”
See Photos, page 5 [post 48]
See Summary at page 8 [post 78]

2. Dario/ClaveFremen prepared a very detailed BOM for swapping, adding and omitting various passive components. Overall view is, “If you decide to use my BOM it will sound good from the start, an alternate external power supply like Salas Shunt could go even further but only after you have optimized the rest, IMHO.”
From page 100 [post 996]

3. apoopoo999 -- Salas Shunt design ... Photos, Page 87 [post 862]
4. df_genius -- Salas shunts ... Photo, [post 667]
5. Sergelisses -- Salas shunt (and other... ?)
See photos [posts 813 and 1347, 1351]
6. simes123 -- photos [post 1015]
7. Discussion of Salas shunt regulator – see [post 1127] and others...
8. Nosian -- offboard-PSUs-to-charge battery, photo at [post 1188]
9. Giobax -- Salas shunt reg, pics at [post 1375]
10. Piersma -- Walt Jung regulators, pics page 172 [post 1716]
11. Dario/ClaveFremen -- simple shunt design, pics on breadboard [1620].
  Reply With Quote
Old 7th June 2012, 05:02 AM   #1858
diyAudio Member
 
Join Date: May 2012
Thanks truepaul.... The simple shunt design would be exactly what I was looking for but it seems like geared towards the minidac, where I am looking for some shunt design for the big board.

Thanks for the awesome effort in showing me whats out there, but I wish there was a step by step on how to replace regulators and shunts....

Do you know if there is a direct way to replace regulators with maybe better regulators like STR?
  Reply With Quote
Old 8th June 2012, 01:15 AM   #1859
bcmbob is online now bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
Just confirming that the DAC works properly with the continuity between SPFIF "in" and ground. Really threw me off, but I'm still glad I double checked. Thanks again.
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 8th June 2012, 08:44 AM   #1860
fulvio is offline fulvio  Italy
diyAudio Member
 
Join Date: Jun 2006
Location: Trieste, Italy
Hi, I’m going to add a SPDIF input selector to the 2496 DAC board.
Some of the SPDIF signals I want to input to the DAC board are 0/5 V TTL (i.e. the signals from TORX toslink receivers, output of balanced line receiver 26LS32 and the signal coming from a CD-ROM drive).
According to CS8416 data sheet, the maximum input level for SPDIF data is VL+0.3V, and VL is 3.3V.
I tried to use a voltage divider (after removing the 75 ohm resistor at the DAC board input) from 0/5 V to 0/3.3V, but this slows down the edges of the SPDIF data, producing a rise time > 50 ns (I suppose because of the input capacitance of the CS8416 that forms, together with the divider resistances, a low pass filter).
So the question is: did anybody tried to connect a 0/5V SPDIF signal directly to the CS8416 input (with VL = 3.3V) without blowing this IC?
  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
AK4393 burn... CIMONE Digital Line Level 5 24th June 2011 02:12 PM
AK4393 to CS4223? CIMONE Digital Line Level 0 13th December 2009 02:30 PM
AK4393 Serial Configuration Problem Aoxomox Digital Line Level 0 20th March 2009 05:25 PM
AK4393, CS8413 and CS8414 Data Sheets Blue_Max Digital Source 0 23rd December 2004 01:37 PM


New To Site? Need Help?

All times are GMT. The time now is 08:03 PM.


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