Hypex UcD400 reviewed - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 10th May 2006, 09:06 PM   #11
Bgt is offline Bgt  Netherlands
diyAudio Member
 
Join Date: Jan 2005
Location: NL, Voorschoten
Quote:
Originally posted by Jan-Peter
Besides this we hardly find any influence when the amps are mounted very close to each other. However you WILL have problems when you are wiring the amplifiers in the WRONG way.

endless discussion
__________________
Kind regards,
Bert
  Reply With Quote
Old 10th May 2006, 09:06 PM   #12
diyAudio Member
 
Join Date: Sep 2003
Location: -
Quote:
Originally posted by Eva
Are you performing conducted and radiated EMI measurements on signal, speaker and power wires? Will you use any kind of common mode filtering to match SMPS "quietness" industry standards? That's important because any RF component radiated by wirings will be dependent on the audio signal, and it will be demodulated and turned into audio when picked up by other circuits.

By the way, one trick of which I'm taking advantage in high power class D is to use two series inductors laid in a dipole fashion. That produces inherent stray flux cancellation in the far field.
The EMI performance of the UcD amplifiers is very low. Meets easy all standards. We do not use extra common mode filtering.

Our new OEM version (dual UcD180 on one PCB), is having such a low EMI in the 70-110MHz area that these amp can be build together with an internal FM tuner.

Jan-Peter
  Reply With Quote
Old 10th May 2006, 10:07 PM   #13
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Quote:
Originally posted by Jan-Peter [/i]
The purpose of this demo amp was to show how small you can build an UcD amplifier. And it's easier for reviewers to measure on a complete working amplifier, as on separate modules with transformers and power supplies.
The reviewers were greatful to have a working amp. They were also quite pleased, not as skeptical as when they tested one of your competitors (I'm sure you know who).

Quote:
Originally posted by Jan-Peter [/i]
We have on our website soem recommondations for wiring.
This will save a lot of grief and in particular for the builders. Wiring is not obvoius for a "normal" person and correct wiring is _very_ important if you want to take full advantage of the modules. Compare all gainclone builder with not so good wiring directions. Most problems there is hum problems due to uncorrect wiring. Don't forget to make a sketch for stereo and one transformer.
__________________
/Per-Anders (my first name) or P-A as my friends call me
  Reply With Quote
Old 11th May 2006, 08:44 AM   #14
Bgt is offline Bgt  Netherlands
diyAudio Member
 
Join Date: Jan 2005
Location: NL, Voorschoten
Quote:
Originally posted by peranders
This will save a lot of grief and in particular for the builders. Wiring is not obvoius for a "normal" person and correct wiring is _very_ important if you want to take full advantage of the modules.
Correct wiring is of utmost importance but there is no golden rule what's best for any situation. You need a proper wiring scheme that will satisfy the basic needs but than there is the fine tuning, even if it changes the whole basics of the scheme, and here the differences are more present when done right for that situation.
__________________
Kind regards,
Bert
  Reply With Quote
Old 11th May 2006, 08:55 AM   #15
diyAudio Member
 
Join Date: Sep 2003
Location: -
Some of our new OEM version;
http://www.hypex.nl/UcD182.jpg
http://www.hypex.nl/UcD402.jpg

You can see that the cols are quite near mounted to each other. We do not measure any real influence between the two amps.

I am hihly looking forward to the English translation of the Danish review!

Regards,

Jan-Peter
  Reply With Quote
Old 11th May 2006, 02:06 PM   #16
diyAudio Member
 
Join Date: Dec 2005
Location: Berlin
@Jan-Peter: Will these little beauties be availeable to non-OEM customers in the near future?? Please??
Nils
  Reply With Quote
Old 11th May 2006, 02:15 PM   #17
diyAudio Member
 
Join Date: Sep 2003
Location: -
No, I am sorry these are only for OEM customers. The UcD402 is used in our soon-to-be-released 800W subwoofer plate amp. And is used in a www.hevos.nl Bassgitar amplifier.

However there is not really a new thing. With two UcD180 you have one UcD182, and with two UcD400 you have one UcD402.

I am glad you like them.....

Cheers,

Jan-Peter
  Reply With Quote
Old 15th May 2006, 10:28 AM   #18
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Half of the article is translated...
http://sjostromaudio.com/smf/index.p...5.msg716<br />
__________________
/Per-Anders (my first name) or P-A as my friends call me
  Reply With Quote
Old 15th May 2006, 11:21 AM   #19
Banned
 
Join Date: Jan 2005
Eeeek You put it on the driveway to take the pic What if someone had stepped on it.
  Reply With Quote
Old 15th May 2006, 03:19 PM   #20
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
The translation is ready now and I'll hope you can understand something.
__________________
/Per-Anders (my first name) or P-A as my friends call me
  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
How can I recognize an Hypex UCD400 from an UCD180? zigo3 Class D 6 25th March 2009 11:53 PM
f/s hypex ucd400 hg with onboard hxr regs slr 5000 Swap Meet 8 17th March 2009 11:26 AM
Hypex UcD400 HG Monos for sale sbrtoy Swap Meet 10 29th June 2008 01:30 PM
My hypex UcD400 based amp dagoose Class D 3 27th May 2008 06:00 PM
Hypex UcD400 3-channel $1,200 Al Garay Swap Meet 1 10th November 2005 06:49 AM


New To Site? Need Help?

All times are GMT. The time now is 08:55 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