900W H-class PA Amp with Limiter - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 2nd March 2010, 12:34 PM   #1
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Default 900W H-class PA Amp with Limiter

Do anyone want to DIY something like that?
Attached Images
File Type: jpg APEXaudio H900.jpg (242.1 KB, 24588 views)
  Reply With Quote
Old 2nd March 2010, 12:51 PM   #2
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi apexaudio
greetings cool pcb would be a great diy project for h class diyers
keep up the goodwork
thanking you
andrew lebon
  Reply With Quote
Old 2nd March 2010, 12:59 PM   #3
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
On this PCB I use IRF540 in paralel for step higher voltage, and LDR for limiter. Output stage with 2SA1943/2SC5200. Step driver with IR2117 and NE5532 on balanced input stage.
  Reply With Quote
Old 2nd March 2010, 01:13 PM   #4
diyAudio Member
 
sumaudioguy's Avatar
 
Join Date: Jan 2010
Location: Midwest U.S.A.
Default NJM2068 is better than NE5532 in every way!!!

Quote:
Originally Posted by apexaudio View Post
On this PCB I use IRF540 in paralel for step higher voltage, and LDR for limiter. Output stage with 2SA1943/2SC5200. Step driver with IR2117 and NE5532 on balanced input stage.
NJM2068 is better than NE5532 in every way!!!

To everyone- please quit using this horrid sounding 30 year old op amp. The 2068 is better in every way, quieter, lower distortion, less offset and drift, larger output current, lower input bias, faster, and most important of all it sounds FAR better than any 5532 ever thought about.
  Reply With Quote
Old 2nd March 2010, 01:28 PM   #5
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
This is 10years old schematics. Can be upgrade with new OP amp.
  Reply With Quote
Old 2nd March 2010, 03:23 PM   #6
wahab is offline wahab  Algeria
diyAudio Member
 
Join Date: Nov 2009
Location: algeria/france
Quote:
Originally Posted by sumaudioguy View Post
NJM2068 is better than NE5532 in every way!!!

To everyone- please quit using this horrid sounding 30 year old op amp. The 2068 is better in every way, quieter, lower distortion, less offset and drift, larger output current, lower input bias, faster, and most important of all it sounds FAR better than any 5532 ever thought about.
Beg to differ...
The old guy is faster than the japanese counterpart..
ALso, it has no more distorsion , and is as much quiete..
  Reply With Quote
Old 2nd March 2010, 04:29 PM   #7
diyAudio Member
 
sumaudioguy's Avatar
 
Join Date: Jan 2010
Location: Midwest U.S.A.
Quote:
Originally Posted by wahab View Post
Beg to differ...
The old guy is faster than the japanese counterpart..
ALso, it has no more distorsion , and is as much quiete..

I suggest you measure these two op amps in circuits as used and see the result.
  Reply With Quote
Old 2nd March 2010, 04:32 PM   #8
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
I used TL072 on some PCB, at the end this is PA amplifier, work with 18inch subwoofer.
  Reply With Quote
Old 2nd March 2010, 06:36 PM   #9
wg_ski is online now wg_ski  United States
diyAudio Member
 
Join Date: Oct 2007
It doesn't look like your commutating diodes are on the heat sink.... Are you expecting them to run stone cold? I wouldn't. BTW - which ones are you using? Looks to me like a 2-lead TO-220.

BTW - for all the naysayers - there's nothing wrong with a 5532 in a PA AMP! I use OPA2604's but that's personal preference because I grew up on the LF353. Still doesn't pass the audiophile snob test.
  Reply With Quote
Old 2nd March 2010, 06:57 PM   #10
diyAudio Member
 
event horizon's Avatar
 
Join Date: Feb 2008
Location: East Midlands, England
Quote:
Originally Posted by apexaudio View Post
Do anyone want to DIY something like that?
Well lets just say that seeing how it is built would be interesting I'm sure that a good few people could find use for a powerful & more efficient (than AB) amplifier

I for one am interested & thanks for sharing if you do
__________________
"Never let your morals prevent you from doing what is right!" Salvor Hardin
  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
Nakamichi PA-7 & PA-5 Bias Setting? sourceoneaudio Solid State 6 8th March 2012 12:37 PM
900w amp module for sale nigelwright7557 Swap Meet 0 9th July 2009 11:05 PM
About a very very simple class D PA amp gaetan8888 Class D 8 13th March 2009 02:21 PM
Class-d for a 1kw PA amp MikeHunt79 Class D 4 30th December 2007 06:19 PM
200w Amp + 900w Sub = explosion? 56k Warning Daemonicus Subwoofers 2 31st May 2006 04:30 AM


New To Site? Need Help?

All times are GMT. The time now is 02:34 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