DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 37 - 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 19th July 2011, 09:57 PM   #361
Reality first!
diyAudio Member
 
ClaveFremen's Avatar
 
Join Date: May 2005
Location: Milan, Italy
Quote:
Originally Posted by Tenson View Post
It is generally my finding that parts swapping does very little, while actual design changes can bring big improvements.
It could be that you used the wrong parts...

For sure design changes can bring big improvements but part selection can't be overlooked, IMHO.

A poor parts selection can seriously prejudice performance...
__________________
Dario
ClaveFremen "Bailando Salsa en el Sietch"
  Reply With Quote
Old 19th July 2011, 10:00 PM   #362
Tenson is offline Tenson  United Kingdom
diyAudio Member
 
Join Date: Feb 2006
Location: Kent
I suppose you are right, but good parts are certainly not those that are 'high quality'. I've tweaked circuits trying different caps in all sorts of places and often the best bypass cap is a 10uF electrolytic, not a fancy Tantalum or such. Same with Op-amp, I often find a NE5532 gives equal performance as mega expensive ICs.
  Reply With Quote
Old 20th July 2011, 12:06 AM   #363
Reality first!
diyAudio Member
 
ClaveFremen's Avatar
 
Join Date: May 2005
Location: Milan, Italy
Quote:
Originally Posted by Tenson View Post
I suppose you are right, but good parts are certainly not those that are 'high quality'. I've tweaked circuits trying different caps in all sorts of places and often the best bypass cap is a 10uF electrolytic, not a fancy Tantalum or such.
I didn't ever tried a single tantalum...

Exactly, what you mean for 'high quality'?

Quote:
Originally Posted by Tenson View Post
Same with Op-amp, I often find a NE5532 gives equal performance as mega expensive ICs.
NE5532 is pretty good opamp, it doesn't a single thing wrong.

It has a perfect timbre and a good soundstage but -some- opamps are better, however.
__________________
Dario
ClaveFremen "Bailando Salsa en el Sietch"
  Reply With Quote
Old 20th July 2011, 01:46 AM   #364
erin is offline erin  Australia
diyAudio Member
 
Join Date: Nov 2006
Location: http://www.makeitpossible.com/
Quote:
Originally Posted by Tenson View Post
It is generally my finding that parts swapping does very little, while actual design changes can bring big improvements.
I have no doubt that swapping some parts will do little to what you see on a screen.
But how about listening to the changes with your ears?

Its an old debate. What you measure vs what you hear.
IMO this is the reason that so many average sounding pieces of equipment are sold in shops. They measure perfect - but sound poor.

There are also some that strive to achive very low distortion, like 0.00005%. But you have to put a lot of negative feedback to achieve this, and have worlds lowest noise power supplies.
In the end, it may not sound as good as something with 0.05% distortion and less negative feedback, and noisier power supply. Sound is subjective. We all know that.

Last edited by erin; 20th July 2011 at 01:51 AM.
  Reply With Quote
Old 21st July 2011, 11:49 AM   #365
diyAudio Member
 
Join Date: Oct 2006
Location: Cambridge, UK
Can anyone suggest a source in the UK for the 15-0 and 9-0.V transformer for the DAC? The Chinese sources seem a little overpriced due to the postage. I could fall back onto two transformers but that does seem a bit clunky.
  Reply With Quote
Old 21st July 2011, 11:57 AM   #366
diyAudio Member
 
Join Date: May 2011
In my opinion, $35,95 is not too much for a perfect R-core transformer despite the fact that I'm from hungary
Here, a link.

However, if anyone knows one at a lower price, I would also appreciate a link, as I haven't ordered the one above yet.
  Reply With Quote
Old 21st July 2011, 12:13 PM   #367
col_s is offline col_s  Australia
diyAudio Member
 
Join Date: Jul 2008
The R-Core price is good. I doubt you'll find that in the UK.

For an all-in-one transformer, there's this from RS Components Buy PCB Mounting Transformers PCB mount transformer,12VA 2x0-12V o/p RS 10-5922 online from RS for next day delivery.

It's 14-0-14 + 0-9. It's encapsulated EI core and PCB mount, so might be a bit of a hassle to mount and wire up. I would mount it in a separate box.


You could get two small toroidals. The Nuvotem brand, also from RS components, are good quality.
  Reply With Quote
Old 21st July 2011, 12:57 PM   #368
diyAudio Member
 
Join Date: Oct 2006
Location: Cambridge, UK
Default Transformer

Quote:
Originally Posted by col_s View Post
The R-Core price is good. I doubt you'll find that in the UK.

For an all-in-one transformer, there's this from RS Components Buy PCB Mounting Transformers PCB mount transformer,12VA 2x0-12V o/p RS 10-5922 online from RS for next day delivery.

It's 14-0-14 + 0-9. It's encapsulated EI core and PCB mount, so might be a bit of a hassle to mount and wire up. I would mount it in a separate box.


You could get two small toroidals. The Nuvotem brand, also from RS components, are good quality.
Hi,

that RS reference seems to be ideal ... it is specified as PCBmount transformer,30VA 1x0-9V 2x0-14V and costs about 17... also reasonable. Does the eBay transformer have any advantages over the RS model?

George
  Reply With Quote
Old 21st July 2011, 01:04 PM   #369
erin is offline erin  Australia
diyAudio Member
 
Join Date: Nov 2006
Location: http://www.makeitpossible.com/
I think the R core is meant to keep the electromagnetic field more contained than E core transformers. I do own both types of transformer, but never did an AB comparison.
FWIW I never heard any EMI from an E core transformer, also never had any problems of any sort from E cores. But some people do insist that R core is better.

I'm going to go out on a limb and say that on this kit it wont matter one tiny bit whether you use E core, R core or toroidal. As the kit will perform very well with either. I'd suggest supporting your local economy and buy whatever you can locally.

Last edited by erin; 21st July 2011 at 01:14 PM.
  Reply With Quote
Old 21st July 2011, 01:24 PM   #370
col_s is offline col_s  Australia
diyAudio Member
 
Join Date: Jul 2008
Quote:
Originally Posted by erin View Post
I'm going to go out on a limb and say that on this kit it wont matter one tiny bit whether you use E core, R core or toroidal. As the kit will perform very well with either. I'd suggest supporting your local economy and buy whatever you can locally.
i reckon you're probably right. The differences are more apparent with higher power amplifiers and things like that, where size, weight, magnetic fields become significant with EI core. I also think that small toroidals without shields could be worse, due to their ability to pass noise through from the mains. So EI is probably a good way to go.
  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 10:38 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