hypex ncore - Page 18 - 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 22nd June 2011, 09:15 AM   #171
diyAudio Member
 
Join Date: Mar 2011
Quote:
Originally Posted by Bruno Putzeys View Post
The amplifier modules would come with cables that have connectors on one end only, the SMPS would be shipped with another set of cables that have connectors fitted on both ends. But the latter part hinges on some agreement on how long those cables should be.
Hi Bruno,
First of all, its great that you take the temperature on the DIY community before you finalize your DIY oriented module. This is how proper product development is done!

Concerning the connector types, would it be possible to provide the bare connectors with the modules as the choice of cables may be a parameter some likes to work with? (Personally I do, of course ) -It would also engage any who wants to place the modules as they please in one or more chassis...

Im all in for banana-plug connectors

best regards,
Joakim
  Reply With Quote
Old 22nd June 2011, 09:39 AM   #172
diyAudio Member
 
Join Date: Apr 2004
Location: BE/NL/RW/ZA
+bare connectors in the package, no problem.

(Strictly speaking the contacts are supposed to be crimped but you can solder wires to them. For the purists, Molex crimping tools aren't too expensive)
  Reply With Quote
Old 22nd June 2011, 02:28 PM   #173
cOz is offline cOz  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Houston
How will we know when some of the new technology has trickled into the other products?
  Reply With Quote
Old 22nd June 2011, 02:52 PM   #174
UrSv is offline UrSv  Sweden
diyAudio Member
 
UrSv's Avatar
 
Join Date: Jan 2002
Location: Sweden
What about a jumper for the mute on/off on board in order not to have to handle it off board?
__________________
UrSv
Those who say it can't be done should not stop those who are doing it.
  Reply With Quote
Old 22nd June 2011, 02:57 PM   #175
diyAudio Member
 
Join Date: May 2002
Location: Switzerland
Quote:
How will we know when some of the new technology has trickled into the other products?
I think many OEMs will be proud to use the tchnology and they will tell it without being asked at all (like it is the case with some UsD users already).

Regards

Charles
  Reply With Quote
Old 22nd June 2011, 03:10 PM   #176
diyAudio Member
 
Join Date: Apr 2004
Location: BE/NL/RW/ZA
I think cOz' question was about Ncore derived refinements arriving in the UcD series. The UcD250LP already has them, the rest still has to be done.

@UrSv: just tie the mute pin to ground.
  Reply With Quote
Old 22nd June 2011, 03:34 PM   #177
diyAudio Member
 
Join Date: Jul 2010
Default Bruno:

I think the plan you stated sounds perfect, and should please the vast majority of DIY builders. Thanks!
  Reply With Quote
Old 22nd June 2011, 04:20 PM   #178
diyAudio Member
 
eclectic2k's Avatar
 
Join Date: Nov 2005
Location: Silicon Valley
Quote:
Originally Posted by Bruno Putzeys View Post
Is everyone OK with the current Mogami cable?
works fine for me. I also like the screw terminals for the outputs.
screw terminal is OK for many of the other connections as well (does take up more real estate...) Microfit are nice, not especially DIY friendly, but if one is supplied, and replacements are generally available it is not any problem.

thanks!
  Reply With Quote
Old 23rd June 2011, 07:05 AM   #179
diyAudio Member
 
Join Date: Sep 2010
Bruno,
When I read this my antennae went vertical:
Quote:
A class D amplifier gives you something on the order of 100kHz of bandwidth to do error control in. With a linear design you can readily achieve 10 to 100 times that. If I were to let the kind of control theory as used in Ncore loose on an amplifier with a 10MHz loop bandwidth people would really quickly learn to state distortion in decibels instead of percents and counting the zeros. You could probably string a hundred such amps end to end and still not hear a difference between input and output. Why no such amps actually turn up is because control theory, for most, is a black art.
For a couple months, I've been considering higher order control loops (3rd-4th order) for class-A(B) amps. Clipping and start-up stability are, of course, major design issues with such arrangements. My thinking only got me to pre-clamping (like Bob Cordell's Klever Klipper) and out-of-bounds detection to initiate a state-clearing mute (to be used at start-up as well). The concept of dynamically modifying the loop to fall back to a stable lower-order loop was new to me when I read your N-Core white paper. However, for a linear amplifier, this does not seem as easy and straightforward as
Quote:
some arrangement in the modulator may detect clipping and simply remove a few poles from the loop until the coast is clear...
when the gain crossover frequency must be kept below some point (1-10MHz let's say).

I am VERY interested in how you would approach continuous stability, during start-up and clipping, in a high-order-loop class-A(B) amp. Any tips/hints/topologies/circuits/references you can provide now would be invaluable to me. (And I hope that a practical demonstration amp and accompanying article are in your future.)
  Reply With Quote
Old 23rd June 2011, 07:20 AM   #180
diyAudio Member
 
Join Date: Apr 2004
Location: BE/NL/RW/ZA
Quote:
Originally Posted by thune View Post
Any tips/hints/topologies/circuits/references you can provide now would be invaluable to me. (And I hope that a practical demonstration amp and accompanying article are in your future.)
You might see if the Ncore patent application supplies inspiration. I'd love to make and publish a demonstration design of a class AB "feedback monster" to supplement the Linear Audio article (an encore of extrema so to speak) but to keep my sanity I have decided to take a FIFO approach towards my spare time, ie. think very carefully if I want or need to do it and then stick it at the end of the line. This FIFO already contains three years' worth of Grimm Audio stuff (an MFB sub for the LS1, a compressor, an EQ, a mic pre, a discrete true 192/24 bit AD/DA) so all I can do is to schedule any class AB related activities after that. I do hope that by that time someone else will have cracked it because it's a lot easier to do than a decent class D.

Last edited by Bruno Putzeys; 23rd June 2011 at 07:25 AM.
  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 11:38 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