DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 157 - 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 10th April 2012, 07:55 AM   #1561
Reality first!
diyAudio Member
 
ClaveFremen's Avatar
 
Join Date: May 2005
Location: Milan, Italy
Quote:
Originally Posted by billo44 View Post
Here are bigger pics including the legend on the Transformer.
Quote:
Originally Posted by TjiptoHendrawan View Post
I think the connection should be blue (15) - black and blue (0) - black (15)
Exactly.

According to the label you shoud use (they should be in pairs)

BLU1 -> 15V
BLK1/BLU2 -> 0V
BLK2 -> 15V

Usually the first color in pair is phase and the second is neutral

Quote:
Originally Posted by idjoel2000 View Post
looks interesting, dario.. how can we make the +9V version?
The regulator is pretty easy to adapt, you simply change the zener considering that the output voltage is the zener voltage with 0.6V added.

Also you should calculate the maximum required current, increase it by 15mA and use that current to calculate current setting resistor (1.25V/current).

But I don't know if in digital applications it is any better than a OnSemi MC7809.

Quote:
Originally Posted by dtses View Post
indeed it's much simplier, though have you done any face to face comparison with Salas? Also why do you think it would be an overkill for opamp?
No, Salas shunt is for sure superior.

I think that probably a Salas shunt is overkill since opamps have high PSRR, while in a simple discrete circuit, like the DCB1, PSRR is much lower.
__________________
Dario
ClaveFremen "Bailando Salsa en el Sietch"
  Reply With Quote
Old 10th April 2012, 10:25 AM   #1562
billo44 is offline billo44  United Kingdom
diyAudio Member
 
billo44's Avatar
 
Join Date: Sep 2009
Location: Nagano Japan
"Exactly.

According to the label you shoud use (they should be in pairs)

BLU1 -> 15V
BLK1/BLU2 -> 0V
BLK2 -> 15V

Usually the first color in pair is phase and the second is neutral"

Thanks Dario!


I hooked together the/a blue black pair with 0 continuity as per apoopoo999's kind advice, but I still have no analogue output.

I'm sad now!
Burst another bubble

Do a get an award for 'DIY Dumbo of the week'?

As I see it there are three logical possiblilities ....
1) I haven't fixed the AC supply issue correctly.
2) I damaged some/several components by applying AC power incorrectly.
3) There was more than one problem/error in the first place, and there is another error(s) still to correct.

I think some of my peers on this forum will know if 2) above is likely?

As always I appreciate any advice you can offer peeps.

Bill

Last edited by billo44; 10th April 2012 at 10:55 AM.
  Reply With Quote
Old 10th April 2012, 10:33 AM   #1563
Reality first!
diyAudio Member
 
ClaveFremen's Avatar
 
Join Date: May 2005
Location: Milan, Italy
Quote:
Originally Posted by billo44 View Post
I hooked together the/a blue black pair with 0 continuity as per apoopoo999's kind advice, but I still have no analogue output.

I'm sad now!
Burst another bubble
Hi Bill,

just to be sure measure (trsanformer only) AC from BLU1 and BLK1/BLU2 (it should measure 15Vac) and from BLK2 and BLK1/BLU2 (it should also measure 15V)

If it's so you wired correctly the transformer.

Probably you burnt one or both the MC7x012.

Try to measure Vdc on them.

Click the image to open in full size.
__________________
Dario
ClaveFremen "Bailando Salsa en el Sietch"
  Reply With Quote
Old 10th April 2012, 10:38 AM   #1564
50AE is offline 50AE  Bulgaria
diyAudio Member
 
Join Date: Jul 2011
Location: Sofia, Bulgaria
Some new photos. Today I will play with the anode voltages:


Click the image to open in full size.
http://store.picbg.net/pubpic/D0/84/...bc242bd084.jpg

Click the image to open in full size.
http://store.picbg.net/pubpic/F7/89/...e64246f789.jpg

Click the image to open in full size.
http://store.picbg.net/pubpic/7B/84/...271ef87b84.jpg
  Reply With Quote
Old 10th April 2012, 10:44 AM   #1565
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
Billo - A shot in the dark - I had a very strange problem when wiring my JC-2 pre (yellow board). If both 0V wires were connected to the PCB the unit would not function. After combining them in a terminal block and running a single wire to the board, everythings works. Makes no sense to me ( I was going to post about it) but believe me, it was the only way I could get the pre to work.

Might be worth a try. In the photo the Lighter Note is also powered by the same toroid, but the problem was there even when that circuit was not involved.
Attached Images
File Type: jpg combo.jpg (90.6 KB, 555 views)
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."

Last edited by bcmbob; 10th April 2012 at 10:57 AM.
  Reply With Quote
Old 10th April 2012, 12:24 PM   #1566
billo44 is offline billo44  United Kingdom
diyAudio Member
 
billo44's Avatar
 
Join Date: Sep 2009
Location: Nagano Japan
Quote:
Originally Posted by ClaveFremen View Post
Hi Bill,

just to be sure measure (trsanformer only) AC from BLU1 and BLK1/BLU2 (it should measure 15Vac) and from BLK2 and BLK1/BLU2 (it should also measure 15V)

If it's so you wired correctly the transformer.

Probably you burnt one or both the MC7x012.

Try to measure Vdc on them.

Click the image to open in full size.
Thanks for your help Dario.
I had measured VAC from the transformer before risking applying power to the board (I thought).
I didn't take notes sadly, but I thought I had closer to 15 VAC in my original blue1 - black1/black2 - blue 2 configuration....

Supply voltage here is just a little under 100 VAC/@60Hz.

Here is a low res picture of my notes, red is my actual measured voltages on my DAC.

Bill
Attached Images
File Type: jpg Notes.jpg (111.9 KB, 266 views)

Last edited by billo44; 10th April 2012 at 12:29 PM. Reason: drunkeness (only slightly... no more playing with volts tonight!)
  Reply With Quote
Old 10th April 2012, 03:12 PM   #1567
diyAudio Member
 
merlin2069er's Avatar
 
Join Date: Sep 2008
Location: Toronto
Blog Entries: 1
Send a message via MSN to merlin2069er
Here's an unbalancer using miniature 6n16b tubes.... the blog is in italian (but you can use google to translate it into english.

Valvole & Audio: UNBALANCER Project

Does anyone know where I can get a spice simulator for tubes?
  Reply With Quote
Old 10th April 2012, 07:57 PM   #1568
F1 FAN is offline F1 FAN  Canada
diyAudio Member
 
Join Date: Jun 2006
Quote:
Originally Posted by billo44 View Post

Here is a low res picture of my notes, red is my actual measured voltages on my DAC.

Bill
It's not indicated but do you have the 3.3 and 5 volt on the other regs?
  Reply With Quote
Old 10th April 2012, 11:34 PM   #1569
diyAudio Member
 
Join Date: Feb 2010
Bill, any of the chip getting very hot?
  Reply With Quote
Old 11th April 2012, 12:22 AM   #1570
billo44 is offline billo44  United Kingdom
diyAudio Member
 
billo44's Avatar
 
Join Date: Sep 2009
Location: Nagano Japan
Quote:
Originally Posted by F1 FAN View Post
It's not indicated but do you have the 3.3 and 5 volt on the other regs?
All seem OK as per attached picture (small print sorry).

Quote:
Originally Posted by apoopoo999 View Post
Bill, any of the chip getting very hot?
I'll check that out, I haven't left the thing on too long for fear of smoking a chip.

I can start hunting down the signal trace with a scope...?
Don't really know what I'm doing though...

Thanks everyone.
Bill
Attached Images
File Type: jpg mini2496.jpg (141.6 KB, 284 views)
  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 08:20 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