Power Supply PCB for ES9023 / WM8804 S/PDIF DAC Group Buy - Page 9 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 1st December 2012, 03:31 PM   #81
diyAudio Member
 
Join Date: Jan 2011
Location: sitting down
J-P: thanks.

nice to know this thing is flexible. I'll certainly do the math and read the lm723 datasheet.

Korben:
I purchased the 230V version (my bad) and used those pads to cross the input legs to get the 115V input.


FWIW, here's the the TFO datasheet link:
I used diagram F to hookup to the psu.
http://www.tamuracorp.com/clientuplo...cs/3FD-3XX.pdf
  Reply With Quote
Old 1st December 2012, 03:43 PM   #82
VT67 is offline VT67  Belgium
diyAudio Member
 
VT67's Avatar
 
Join Date: Jun 2004
Location: Belgium
In the BOM R4 is a 1K2 resistor with Mouser partnumber 667-ERA-6AEB102V.
That partnumber is for a 1K resistor. For a 1K2 resistor the partnumber should be 667-ERA-6AEB122V.

Regards
  Reply With Quote
Old 1st December 2012, 04:24 PM   #83
pchw is offline pchw  United States
diyAudio Member
 
Join Date: Apr 2006
Location: Fremont, California
Take a look at the Design Guide - Rectifier User from Hammond Transformer.

When a transformer is used as Full Wave Bridge Cap Input, the current rating is reduced to about 0.62 in the circuit. This means that you really don't want to draw more than 200ma out of it (300ma x 0.62), I have seen the derating factor of 0.7 which might be for a perfect transformer with no loss.
__________________
- Fred -
  Reply With Quote
Old 2nd December 2012, 04:17 PM   #84
Veggiel is offline Veggiel  Belgium
diyAudio Member
 
Join Date: Jun 2010
What is the range of secondary transformer output suitable for this power supply?
  Reply With Quote
Old 2nd December 2012, 05:23 PM   #85
pchw is offline pchw  United States
diyAudio Member
 
Join Date: Apr 2006
Location: Fremont, California
The max input-output differential of the LM723 is 38VDC which suggests the secondary transformer can be up to 26Vac, in theory. However, other parts are likely to be out of specs if such transformer is used.

Something like this should work pretty well.
__________________
- Fred -
  Reply With Quote
Old 2nd December 2012, 05:47 PM   #86
diyAudio Member
 
Join Date: Jun 2006
would you please recommend more powerful transformer than 3FD-316
0.15 A for a secondary Is too small
  Reply With Quote
Old 2nd December 2012, 07:26 PM   #87
pchw is offline pchw  United States
diyAudio Member
 
Join Date: Apr 2006
Location: Fremont, California
Notice the 3FD-316 is used with the secondary parallel; therefore,
it works like 0.3A. JP or Subbu can fill in, I believe a fully populated
v2.6 consumes around 100ma, therefore, this transformer is more
than adequate for one SE configuration.

Some people prefer over sized transformers, some prefer the right
size in the designed circuit. So, this can be a personally preferences.
My usual suggestion is to try it and decide yourself which is what I
will be doing :-)

My current PS uses a 36VA EI transformer (9-0-9 2A) that powers
various PS boards that I have made, including the SSLV BiB. One thing
for sure, my current set up is not as compact as this PSU. At the end,
one of them will stay :-)
__________________
- Fred -
  Reply With Quote
Old 4th December 2012, 04:44 AM   #88
syklab is offline syklab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Location: Hong Kong
Hi Subbu,
Board received today, perfect. Can you also recommend an alternative transformer that would fit the board.

Thanks
  Reply With Quote
Old 4th December 2012, 07:09 AM   #89
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
A fully populated V2.6 draws 50 mA tot 70 mA depending on the XO used. The Fox ones are the most "power hungry". The transformer is more than adequate for 2 DAC boards.

Don't use transformers with higher voltages than 9 V AC.
__________________
It's only audio. Official member of the Norske Brillegeit Gang.

Last edited by jean-paul; 4th December 2012 at 07:14 AM.
  Reply With Quote
Old 7th December 2012, 02:25 PM   #90
diyAudio Member
 
ByronInPortland's Avatar
 
Join Date: Nov 2010
Location: Portland, Oregon
I receive my PS boards yesterday and got to work on them right away. Thank you so much Subbu!!

And now I have 2 quick questions.
Neither C13 nor Cled are in the BOM. C13 looks like it might be the same as C2, C4 and C5. Should I use C2, C4 and C5 for C13?
Do you have a recommendation for Cled?

I'm looking forward to getting this inside my preamp! Thanks, Subbu and Jean-Paul!

-Byron
  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
Case for "ES9023 / WM8804 S/PDIF DAC Group Buy" rvrazvan Digital Source 3 27th July 2014 08:37 AM
ES9023 / WM8804 S/PDIF DAC Group Buy unixdeveloper Group Buys 680 24th January 2014 04:05 PM
ES9023 / WM8804 S/PDIF DAC Parts GB EU Only korben69 Group Buys 187 10th October 2012 11:25 AM
Bragi, WM8804/ES9023 DAC Neutrality Digital Line Level 9 22nd September 2012 11:10 AM
FS: Twisted pear audio Dual COD DAC and WM8804 S/PDIF free2dev Swap Meet 4 24th July 2010 12:43 AM


New To Site? Need Help?

All times are GMT. The time now is 12:05 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