hypex ncore - Page 656 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Vendor's Bazaar

Vendor's Bazaar Commercial Vendors large & small hawking their wares

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 13th March 2013, 10:59 AM   #6551
diyAudio Member
 
Join Date: Mar 2004
Location: At the output stage
Send a message via Yahoo to mr_push_pull
isn't the NCORE low-pass filtered already? actively, indeed.
__________________
we all love a good ol' stereotype until it's against us
  Reply With Quote
Old 13th March 2013, 11:38 AM   #6552
3lviz is offline 3lviz  Finland
diyAudio Member
 
Join Date: May 2009
I guess then the hf garbage is attenuated twice.
  Reply With Quote
Old 13th March 2013, 11:54 AM   #6553
diyAudio Member
 
Join Date: Mar 2004
Location: At the output stage
Send a message via Yahoo to mr_push_pull
depends if the active stage can handle it.
__________________
we all love a good ol' stereotype until it's against us
  Reply With Quote
Old 13th March 2013, 12:37 PM   #6554
3lviz is offline 3lviz  Finland
diyAudio Member
 
Join Date: May 2009
How come?

If i have understood right and the frequency response on the datasheet is from the nc400 input filter (not output filter or the source device's output filter) and the response (or rather the filtering) continues with similar Q after 100 khz too, it attenuates the input around 20 dB near the switching frequency (480khz). The added RC-filter does preliminary 24 dB attenuation near the switching frequency.

Last edited by 3lviz; 13th March 2013 at 12:57 PM.
  Reply With Quote
Old 13th March 2013, 01:19 PM   #6555
3lviz is offline 3lviz  Finland
diyAudio Member
 
Join Date: May 2009
To my knowledge, at worst, no harm done. At best, an improvement.

Last edited by 3lviz; 13th March 2013 at 01:21 PM.
  Reply With Quote
Old 16th March 2013, 10:15 PM   #6556
robbbby is offline robbbby  Canada
diyAudio Member
 
Join Date: Feb 2012
My one amp channel is still giving me problems. Sometimes it cuts in and out, other times there is no music at all. However I realized today, when it cuts in and out, or goes completely silent, I can still put my ear up to the tweeter and hear the music, it sounds like it is playing an un-amplified signal.

My tweeter is dead silent when my good amp is on but without music playing. My other speaker that is hooked up to the problematic amp has white noise on the tweeter, and that is with the input cable both plugged in or disconnected. Also with the input cable both connected or disconnected the speakers will make occasional random "blip" types noises.

I've already talked to hypex support and I don't want to pay $120+ to ship the module back, so I was hoping somebody here may have some suggestions. From what I understand it is not OVP. The OVP will usually generate an audible clicking noise at the amplifier, I am not getting anything like that.
  Reply With Quote
Old 16th March 2013, 11:49 PM   #6557
ua100k is offline ua100k  United States
diyAudio Member
 
ua100k's Avatar
 
Join Date: Dec 2009
Location: Bernardsville, NJ
Quote:
Originally Posted by robbbby View Post
My one amp channel is still giving me problems. Sometimes it cuts in and out, other times there is no music at all. However I realized today, when it cuts in and out, or goes completely silent, I can still put my ear up to the tweeter and hear the muserzic, it sounds like it is playing an un-amplified signal.
This means NAMPON is being triggered. There is high frequency signal flow though as the NAMPON only turn the stage off and it is not a complete signal cut off.

NAMPON has to be zero for your amp to be on. Any "perceived" voltaged and the unit goes off. Would suggest clean up wiring before you send it back to see if the problem goes away. Or remove any wire connections to NAMPON on the NC400
__________________
Audio Purity
  Reply With Quote
Old 17th March 2013, 08:51 AM   #6558
Julf is offline Julf  Europe
diyAudio Member
 
Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by ua100k View Post
NAMPON has to be zero for your amp to be on. Any "perceived" voltaged and the unit goes off. Would suggest clean up wiring before you send it back to see if the problem goes away. Or remove any wire connections to NAMPON on the NC400
Good suggestions. Robbbby, how is your NAMPON (pin3 of the audio input connector, J9) connected?
  Reply With Quote
Old 17th March 2013, 10:22 AM   #6559
Larsas is offline Larsas  Sweden
diyAudio Member
 
Join Date: Jan 2013
Location: Stockholm
Quote:
Originally Posted by Julf View Post
Good suggestions. Robbbby, how is your NAMPON (pin3 of the audio input connector, J9) connected?
Had exactly this problem with one of my nCore monoblocks, discovered I had made a mistake soldering the XLR connections (mixed up pins). Resoldered and problem gone, no harm done.
  Reply With Quote
Old 17th March 2013, 10:40 AM   #6560
robbbby is offline robbbby  Canada
diyAudio Member
 
Join Date: Feb 2012
Quote:
Originally Posted by ua100k View Post
This means NAMPON is being triggered. There is high frequency signal flow though as the NAMPON only turn the stage off and it is not a complete signal cut off.

NAMPON has to be zero for your amp to be on. Any "perceived" voltaged and the unit goes off. Would suggest clean up wiring before you send it back to see if the problem goes away. Or remove any wire connections to NAMPON on the NC400
The wiring that I had shown you when you were trying to help me troubleshoot via email has been removed. The only thing I have left now is nc400 input cable, jumper cable between nc400/smps and AC supplying smps, it's just the basics with a 120V switch on the back to turn it on. Still the same problem.

Quote:
Originally Posted by Julf View Post
Good suggestions. Robbbby, how is your NAMPON (pin3 of the audio input connector, J9) connected?
It is connected to the shield of the input cable, which is connected to pin1, which jumps to the outer metal tab of the xlr connector and jumps to my chassis which is also connected to earth. So pin1 shield is common to nampon and the entire chassis.
  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
Hypex problem, who can help Hansms Class D 9 18th August 2013 06:49 AM
Hypex steveww Class D 14 18th November 2010 01:44 PM
Question for those who have tried hypex smps with hypex modules avian Class D 12 3rd March 2009 09:30 AM
Hypex UcD 180AD + signal wires, Power Supply ST, Hypex Transformer TR100A c10h12n2 Swap Meet 7 7th July 2007 03:55 PM
FS: Hypex UcD 400/180AD, hypex toroid Archmage Swap Meet 4 14th November 2006 04:23 AM


New To Site? Need Help?

All times are GMT. The time now is 07:38 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