hypex UcD400 step by step - 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 29th May 2008, 04:26 PM   #1
MA_AV is offline MA_AV  Israel
diyAudio Member
 
Join Date: May 2008
Smile hypex UcD400 step by step

Hi,
this is my first message ,
I I want to build tow mono block on hypex UcD400,
I dont have background of electronic.
I want to order the necessary parts (UcD400HG TR400 Power supply HG mono) did I forget something ?
but i am afraid that I will not succeed to connect everything together.
does somebody can to explain step by step how to coonect the all part together ?
if there pictures in the explain it will be excellent.
thanks
maor
  Reply With Quote
Old 29th May 2008, 11:58 PM   #2
diyAudio Member
 
Join Date: Aug 2004
Location: White Rock BC CANDA
The closet thing I have seen for a step by step set of instructions is the manual for the kit from DIYCABLE.

http://www.diycable.com/main/pdf/exodus_docs.pdf

While what you build may be different at least you can see how they did it.

Regards,
Doug
  Reply With Quote
Old 30th May 2008, 10:06 PM   #3
MA_AV is offline MA_AV  Israel
diyAudio Member
 
Join Date: May 2008
Default alternative to softstart

Hi,
I saw in number of pictures that in certain cases did not use
the soft start,
1. If I build 2 mono block, I must use the softstart ?
2. is there something alternate to the softstart ?
thanks
maor
  Reply With Quote
Old 31st May 2008, 11:02 PM   #4
Javin5 is offline Javin5  Switzerland
diyAudio Member
 
Join Date: Mar 2006
Location: Switzerland
If you switch on both UcD400 monoblocks suimultaneously, then a soft start is advisable. If you power up one first and then the other one a few seconds later, you could probably do without.

The inrush current depends on your mains transformer and on the size of your power supply capacitors, so there is no fixed rule. In most cases, you would not need a soft start with the UcD180, whereas with the UcD700 it is a must. With the UcD400 you are in borderline territory.

Up to about 500 VA, you can usually risk to go without soft start, unless you have exceptionally large capacitors.

You certainly know that you need a soft start if your main fuse blows or your lights dim when you switch on your amplifier.
  Reply With Quote
Old 1st June 2008, 06:24 PM   #5
TheMG is offline TheMG  Canada
diyAudio Member
 
Join Date: Jan 2008
Also, having a soft-start will extend the life of the power switch. Inductance of toroidal transformers causes increased arcing in the power switch which can wear it down faster over time. Ok yeah I know switches are cheap... but personally I like having something I know won't need fixing for a very long time.
  Reply With Quote
Old 1st June 2008, 08:16 PM   #6
croger is offline croger  United States
diyAudio Member
 
Join Date: Jan 2008
i built the same. the color coded pic I used to assemble.

[IMG]Click the image to open in full size.[/IMG]
  Reply With Quote
Old 2nd June 2008, 03:41 PM   #7
MA_AV is offline MA_AV  Israel
diyAudio Member
 
Join Date: May 2008
hi,
I have another questions,
I read more a little story about people how build the HYPEX
and they use CAP6 instead of the UcD supply HG or the UcD Supply HG Mono,
what is the CAP6? and is it better from the other ?

where can I buy Transformer 400VA ?
thanks
maor
  Reply With Quote
Old 3rd June 2008, 02:37 AM   #8
TheMG is offline TheMG  Canada
diyAudio Member
 
Join Date: Jan 2008
Quote:
Originally posted by MA_AV
where can I buy Transformer 400VA ?

You can buy it direct from Hypex, or from a 3rd party.

I used: http://www.antekinc.com/

But there are many many more places you can get them.
  Reply With Quote
Old 3rd June 2008, 09:54 PM   #9
MA_AV is offline MA_AV  Israel
diyAudio Member
 
Join Date: May 2008
hi again,
doe's some one know alternative power supply to hypex ?
can somebody tell me what prototype of transforner 300VA I need to 400UcD ?
becouse i see many model like (300VA, 2 X 25V ) (300VA, 2 X 30V
) ( 300VA, 2 X 35V )
I add picture of someone how build mono UcD400
he use tranforner 500VA without softstart, how ?
and he doesent use the hypex power supply (can someone recognize the power supply ?)
Best regards
Attached Images
File Type: jpg hypex1234.jpg (60.7 KB, 1381 views)
  Reply With Quote
Old 4th June 2008, 03:27 AM   #10
TheMG is offline TheMG  Canada
diyAudio Member
 
Join Date: Jan 2008
Well, the 500VA transformer that guy used for a single UCD400 is way overkill.

About 250-300VA per UCD400 should be plenty with sufficient capacitance on the power supply.

You will need a transformer with 2 x 40V, give or take a few.

While you could build your own power supply, I'd recommend for a beginner to use the Hypex one. The Hypex power supply has circuitry for speaker DC protection. Personally I wouldn't build an amplifier without this sort of protection.
  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
Step-by-step ambitious first project! Suggestions? ledhed2222 Multi-Way 7 13th August 2009 04:51 AM
Step-by-step guide to building a speaker Richy Multi-Way 5 5th August 2008 01:48 AM
stuffing Mileva: first timer step by step questions schro20 Full Range 7 2nd June 2008 06:49 PM
how to make spherical wood horns, step by step angeloitacare Multi-Way 0 29th May 2007 02:50 AM
LM3886 & LM3876 Step-by-step P2P Guides?? zenon Chip Amps 11 18th November 2006 04:16 PM


New To Site? Need Help?

All times are GMT. The time now is 05:36 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