Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

Hypex Ncore
Hypex Ncore
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
Closed Thread
 
Thread Tools Search this Thread
Old 15th January 2013, 07:36 AM   #5961
Julf is offline Julf  Europe
diyAudio Member
 
Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by ds23man View Post
But what is wrong with an att. network before the driver?
Apart from screwing up the damping factor? Nothing.
 
Old 15th January 2013, 07:38 AM   #5962
Julf is offline Julf  Europe
diyAudio Member
 
Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by OllBoll View Post
An even easier (and much more safe one) would be to just use an L-pad attenuator before the NCore. Not as ideal but in the real world it shouldn't matter.
Well, in the case of pos, who I think said he could hear hiss out of the nc400, it might matter to some degree.
 
Old 15th January 2013, 08:17 AM   #5963
StigErik is offline StigErik  Norway
diyAudio Member
 
StigErik's Avatar
 
Join Date: Feb 2008
Quote:
Originally Posted by OllBoll View Post
An easy way to remove R141:

First splatter the top and both sides of the resistor with some solder.

Then heat both sides at the same time by laying the soldering iron and when heated just push the resistor away, or push it off with a tweezer.
As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.
__________________
dipoles dipoles dipoles dipoles dipoles dipoles dipoles dipoles and dipoles
 
Old 15th January 2013, 08:24 AM   #5964
Julf is offline Julf  Europe
diyAudio Member
 
Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by StigErik View Post
As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.
Agree.

Now for a more interesting one - advice for replacing (instead of removing) R141, for someone who wants a resistor, but with a different value?
 
Old 15th January 2013, 11:23 AM   #5965
Paulkouhan is offline Paulkouhan
diyAudio Member
 
Join Date: Jun 2011
Quote:
Originally Posted by ds23man View Post
Then you should use a nice 20 watt class A amp for a 113db driver
I came from a 8W class A ...
The ncore is definitely better

Quote:
Originally Posted by OllBoll View Post
just push the resistor away
no, trust me dont push the resistor

what is the iron temperature to use ? 300C ?
 
Old 15th January 2013, 11:27 AM   #5966
Telstar is offline Telstar  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: Italy
Quote:
Originally Posted by StigErik View Post
As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.
This is good advice
__________________
"The total harmonic distortion is not a measure of the degree of distastefulness to the listener and it is recommended that its use should be discontinued." D. Masa, 1938
 
Old 15th January 2013, 01:46 PM   #5967
mike_mcf is offline mike_mcf  Canada
diyAudio Member
 
Join Date: Jan 2006
Location: Toronto
Quote:
Originally Posted by ds23man View Post
Then you should use a nice 20 watt class A amp for a 113db driver
If I had a 113db driver then I would use 2W tube amp.
__________________
Michael
 
Old 15th January 2013, 01:55 PM   #5968
StigErik is offline StigErik  Norway
diyAudio Member
 
StigErik's Avatar
 
Join Date: Feb 2008
Or even less. I need only 20W peak with my 88 dB ribbons. In that sense, Ncore is 10x overkill power-wise.
__________________
dipoles dipoles dipoles dipoles dipoles dipoles dipoles dipoles and dipoles
 
Old 15th January 2013, 02:04 PM   #5969
mr_push_pull is offline mr_push_pull  Europe
diyAudio Member
 
Join Date: Mar 2004
Location: At the output stage
Send a message via Yahoo to mr_push_pull
I'm sorry but I don't get it. that resistor is at the edge of the board which should make things easier. and one can practice on a scrapped board. and how in the world is taking a dremel close to the NCORE safer than using a soldering iron? I have worked with surface mount parts, not much but enough to tell you it can be done and I don't have the steadiest hand (due to alcohol and hard drugs abuse, joking) or the best vision (wearing glasses since I was 4) and I managed to do it fine.
__________________
we all love a good ol' stereotype until it's against us
 
Old 15th January 2013, 06:20 PM   #5970
DSP_Geek is offline DSP_Geek  Canada
diyAudio Member
 
Join Date: Aug 2003
Location: Santa Cruz, California
Quote:
Originally Posted by Julf View Post
Apart from screwing up the damping factor? Nothing.
On the other hand, some drivers do better with higher source impedance, as per Hawksford in his article on current drive.
 

Closed Thread


Hypex NcoreHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hypex Ncore vs. NAKSA AlliumPorrum Class D 1 26th May 2015 07:36 PM
Problem with Hypex Ncore Koifarm Class D 29 13th October 2014 07:32 AM
Any news on hypex ncore 2.0? JZatopa Class D 1 13th August 2013 11:30 AM
Hypex UcD700 vs NCore Earbound Class D 25 15th March 2013 05:10 PM
Building a Hypex Ncore... Jabbejokker Class D 0 7th March 2013 10:08 PM


New To Site? Need Help?

All times are GMT. The time now is 10:44 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki