Build thread for Diyinhk ES9018 DAC on Ebay - Page 20 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, 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 24th January 2013, 09:48 AM   #191
Account disabled at member's request
 
Join Date: Aug 2007
Nice ! Can I borrow them please ? Please ?

Unfortunately, ppl's ears are not exactly the same, so the winner is.... the one each person enjoys the most.
  Reply With Quote
Old 24th January 2013, 03:18 PM   #192
glt is offline glt  United States
diyAudio Member
 
Join Date: Oct 2004
I see a brand new ground plane in the ESS DAC board. Good!
__________________
www.hifiduino.wordpress.com
  Reply With Quote
Old 25th January 2013, 02:12 AM   #193
Account disabled at member's request
 
Join Date: Aug 2007
I did a quick n nasty job for the I/V resistors, as I doubt it will make much difference. I cut the traces, dabbed in some paint to prevent accidental solder bridges, scraped off the screen, added some copper, soldered, painted, and fitted resistors.

Macro photos are very helpful - after taking this I can see I need to clean, smooth, etc....
Click the image to open in full size.

And here, the same - needs cleaning 'cos of too much heat etc.

Click the image to open in full size.

I can definitely recommend the Tamron 60mm f/2 macro lens.
  Reply With Quote
Old 25th January 2013, 04:52 AM   #194
Account disabled at member's request
 
Join Date: Aug 2007
Default Another horror show

..and here's the Sigma11 + LT1084.

Click the image to open in full size.

The Sigma11 will only power the analogue DAC section where low output impedance is crucial.

The LT1084 is preceded by an RC filter = 15R 2W resistor (it'll get hot - I'll measure and check it's reasonable) and a 1500uF Rubycon MBZ 16V cap to give over -20dB ripple rejection and HF noise filtering. The LT1084 has a 1.5V or less dropout so even at max load, 15R will not drop too much voltage. It also helps to isolate the LT1084 from the Sigma11.

The LT1084 has two red leds at it's base and a 25uF tantalum cap. This lowers noise and gives a 5.25V output. There's a 220uF cap on the output to ensure stability and green led + 470R resistor to achieve a minimum load of 7mA.

The output is sent to two RC filters: both 2.2R 1W and Nichicon PL 820uF ultra low esr caps. One output is for the WM8805 @75mA and the other for the DAC's adp151 3.3V reg. So again, no problems with the RC filter dropping too much voltage. The 2.2R isolates the two supplies from each other a little, and also means the LT1084 doesn't see the ultra low esr on its output. And of course, it filters the output noise.

This supply is still low profile - the tallest point is the main filter cap - an Elna 3300uF - so height is 20mm. It should fit nicely under the DAC board.

So I'm ready to do a final test and then it's time to think about casing.... which may have to wait 14 weeks !

cheers

Tom

Last edited by KlipschKid; 25th January 2013 at 05:11 AM.
  Reply With Quote
Old 25th January 2013, 04:56 AM   #195
diyAudio Member
 
Join Date: Sep 2012
this len is also very good to soldering smt component
just be careful the iron touch the face when the head is too close
only usd20 dollar and very clear image with no distortion

Click the image to open in full size.
  Reply With Quote
Old 25th January 2013, 05:14 AM   #196
syklab is offline syklab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Location: Hong Kong
Quote:
Originally Posted by KlipschKid View Post
I did a quick n nasty job for the I/V resistors, as I doubt it will make much difference. I cut the traces, dabbed in some paint to prevent accidental solder bridges, scraped off the screen, added some copper, soldered, painted, and fitted resistors.

Macro photos are very helpful - after taking this I can see I need to clean, smooth, etc....
Click the image to open in full size.

And here, the same - needs cleaning 'cos of too much heat etc.

Click the image to open in full size.

I can definitely recommend the Tamron 60mm f/2 macro lens.
佩服!
  Reply With Quote
Old 25th January 2013, 05:54 AM   #197
Account disabled at member's request
 
Join Date: Aug 2007
Quote:
Originally Posted by diyinhk View Post
this len is also very good to soldering smt component
just be careful the iron touch the face when the head is too close
only usd20 dollar and very clear image with no distortion
Cool. Where can I buy one ? Actually, I have a magnifying lens on a gooseneck stand but it isn't really powerful enough.
  Reply With Quote
Old 25th January 2013, 06:04 AM   #198
Account disabled at member's request
 
Join Date: Aug 2007
Quote:
Originally Posted by syklab View Post
佩服!
Thank you, but honestly it looks a mess. However, functionally, it's 100% and that is what matters.

If anyone tries to do this, be very careful with the paint. I used a pin to dab spots of paint on and then spread them. Be careful not to get paint into any through-holes because solder needs to be able to flow freely through them when the resistors are soldered in.

Apart from that, and getting little bits of copper in place, it's easy enough.
  Reply With Quote
Old 25th January 2013, 06:21 AM   #199
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by KlipschKid View Post
Cool. Where can I buy one ? Actually, I have a magnifying lens on a gooseneck stand but it isn't really powerful enough.

I can recommend magnifying visors like these, they dont get in the way and also illuminate the work area. dont get the really cheap ones, the lenses are crap and can cause eye-strain
  Reply With Quote
Old 25th January 2013, 06:35 AM   #200
syklab is offline syklab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Location: Hong Kong
Quote:
Originally Posted by qusp View Post
I can recommend magnifying visors like these, they dont get in the way and also illuminate the work area. dont get the really cheap ones, the lenses are crap and can cause eye-strain
Looks nice, does it comes in more than 5X magnifying power or is 5X enough ?
  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
BUILD THREAD - A New Take on the Classic Pass Labs D1 with an ESS Dac opc Digital Line Level 667 27th August 2014 10:15 AM
High Performance WM8741 Upsampling DAC New Version build thread (show 'n tell too) merlin2069er Digital Source 354 7th April 2013 08:51 PM
Pass D1V3 DAC - build thread spzzzzkt Pass Labs 224 8th December 2012 03:40 AM
Gamma-1 DAC build thread mattmcl Digital Line Level 8 20th January 2012 11:27 PM


New To Site? Need Help?

All times are GMT. The time now is 10:21 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