WEILIANG DAC5 - WM8741 & Tenor TE7022 - Page 10 - 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 7th August 2012, 02:42 PM   #91
diyAudio Member
 
Join Date: Aug 2009
Yes! That looks right. Thanks, Al!
  Reply With Quote
Old 7th August 2012, 04:25 PM   #92
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
So which one appears correct for this application? Here are my choices.

Integrated Circuits (ICs) | PMIC - Voltage Regulators - Linear (LDO) | DigiKey

Can't see a distinguishing mark on the LT.

Also found a third in my drawer:

http://www.chipswinner.com/DS/MC7805.pdf
Attached Images
File Type: jpg fx2.jpg (49.6 KB, 558 views)
File Type: jpg fx1.jpg (57.4 KB, 547 views)
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 7th August 2012, 05:46 PM   #93
alkasar is offline alkasar  France
diyAudio Member
 
Join Date: Jan 2009
Location: near Paris, France
those with label ending with CT are adjustable version.
The fixed voltage label ends with LT1085CT-5 for 5V. You need it in TO220 package.
LT1085CT-5 Linear Technology | LT1085CT-5-ND | DigiKey

LT1085/1086 have better specs than the common 7805. Not sure the difference will be audible though

BTW, given the low current needed, LT1086CT-5 should be sufficient in this application. LT1085 is the high current version, up to 3A. I wonder why Weiliang picked this one ! As the price is similar, it does not make a difference anyway.
  Reply With Quote
Old 7th August 2012, 06:39 PM   #94
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
Great. I'll have one here by Thursday. Anything else you think I should order as backup/just in case - since I'm paying the freight charge already?
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 7th August 2012, 08:24 PM   #95
alkasar is offline alkasar  France
diyAudio Member
 
Join Date: Jan 2009
Location: near Paris, France
Quote:
Originally Posted by bcmbob View Post
Anything else you think I should order as backup/just in case - since I'm paying the freight charge already?
there is a rule in electronics. Whatever the size of your stock, there is always a missing part
  Reply With Quote
Old 7th August 2012, 08:33 PM   #96
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
I'm learning that the hard way
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 11th August 2012, 12:52 PM   #97
regal is offline regal  United States
diyAudio Member
 
Join Date: Jan 2004
Location: MD
Quote:
Originally Posted by dhalbakken View Post
These boards only have one way to change filters, and it changes the oversampling rate, too. There's a DIP switch that sets pin 22 on the WM8741 either high or low. I think you should be able to cut traces and add your own DIP switches to use hardware selection of the filter.

I did not know that Weiliang had a version that allowed software control. Interesting.
It is possible that the Weilang is using relays to select filters in harware mode (audio-gd does this silly work around), but it looks like they are claiming the ability to select all 5 filters at each sample rate which is only possible with software control. Hoping to see a "budget" ebay board like these with software control of the WM8741 show up.
  Reply With Quote
Old 11th August 2012, 01:02 PM   #98
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
Here is a new derivative from a highly respected vendor. Don't know if it will be offered as a kit or if it has a software hook.

Dual WM8741 DIR9001 input plus PCM2706 USB AD797 analog output ultimate DAC ! | eBay
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 11th August 2012, 01:20 PM   #99
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
Got good results with the new reg but still not there yet. Audio is being produced on both channels - Hooraaayy !!

However the quality is very poor. There is a static mask plus distortion the makes the signal unusable.

It can be heard here.

Does that sound familiar to anyone.

S/PDIF is still not working (though its signal is shown as present by the LED) but optical is alive. There is enough progress that I'm considering getting the Tenor module now.

Thanks so much for all the help and direction to get to this point.
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 12th August 2012, 10:12 AM   #100
repeet is offline repeet  Australia
diyAudio Member
 
Join Date: Oct 2009
Location: Brisbane
Getting the USB working is a great idea. It will remove the WM8805 from your list of possible faults.
  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
Info on Tenor TE7022? chaparK Digital Source 22 19th December 2013 11:02 AM
Mission DAC5 (DAC7 chipset) ash_dac Digital Source 7 24th September 2009 01:03 PM
Gran Tenor juliovideo Tubes / Valves 14 16th July 2009 09:19 PM
so who owns a dac5 or m8 phono amp builder jb Tubes / Valves 0 21st July 2005 08:47 PM
Dac5 Norbert Digital Source 2 9th June 2003 09:26 AM


New To Site? Need Help?

All times are GMT. The time now is 11:05 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