900W H-class PA Amp with Limiter - Page 3 - 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 6th March 2010, 03:04 PM   #21
diyAudio Member
 
Join Date: Dec 2005
Location: silang, cavite
Send a message via Yahoo to audiomachines
thanks for sharing
  Reply With Quote
Old 6th March 2010, 03:20 PM   #22
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi apex
greetings
1 any substitute for diode BAV 21
2 any substitute for diode SAF 1603 very hard to find
can you show inputstage schematic and power supply schematic
waiting to make your amplifier thanking you
  Reply With Quote
Old 6th March 2010, 04:51 PM   #23
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by andrewlebon View Post
hi apex
greetings
1 any substitute for diode bav 21
2 any substitute for diode saf 1603 very hard to find
can you show inputstage schematic and power supply schematic
waiting to make your amplifier thanking you
bav21 > byd73c, byd33d
sfa1603 > byv79/200, byw29/200
  Reply With Quote
Old 7th March 2010, 10:14 AM   #24
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Landscape view on H900
Attached Images
File Type: jpg APEXaudio H900.jpg (537.4 KB, 7733 views)
  Reply With Quote
Old 7th March 2010, 03:02 PM   #25
diyAudio Member
 
Join Date: Apr 2008
thank you, i'd most interrested in the 'vas' stage.

the railswitching is nice too
  Reply With Quote
Old 7th March 2010, 10:04 PM   #26
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
I work on my website EUnet Hosting
Most information about my work will be there. I will have more time for reply when site was finished.
Regards Mile
  Reply With Quote
Old 8th March 2010, 01:09 AM   #27
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hi apexaudio
greetings can you share power supply schematic
1 transformer used with filter capcitors
2 current capcity amperes for full output 900 watts
collecting parts for amplifier
thanking you
andrew lebon
  Reply With Quote
Old 8th March 2010, 06:05 PM   #28
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by andrewlebon View Post
hi apexaudio
greetings can you share power supply schematic
1 transformer used with filter capcitors
2 current capcity amperes for full output 900 watts
collecting parts for amplifier
thanking you
andrew lebon
I will post schematic for PSU and protect soon.
Full power of this amplifier is not 900W. Power with THD 0,5% is 1200W on 4R load, and 1800W on 2R load. Output transistor must be MJL4281A/MJL4302A for maximum power. For step mosfet use IRF2807. MJL21193/MJL21194 can be used for full power on 4R load.
Transformer minimum 1500VA for one channel 4X40V AC + 2X20V for protection circuit. 2X35A bridge and 8X10000uF/63V for PSU... are you still interesting to build this amplifier?

Last edited by apexaudio; 8th March 2010 at 06:34 PM.
  Reply With Quote
Old 8th March 2010, 07:07 PM   #29
diyAudio Member
 
event horizon's Avatar
 
Join Date: Feb 2008
Location: East Midlands, England
Hi Mile

Thanks for sharing the class H circuit, having looked at it & it's simplicity i think i'll be incorporating it into a few amps that i'll be building in the future

You have just saved me the hassle of building a switchmode PSU even though i didn't realise it at the time when i saw your circuit. Instead i can use transformers i already have but build a high power high frequency charge pump circuit to power the high voltage rails

Cheers for making me think, & for saving me time, hassle & money

Bests, Mark
__________________
"Never let your morals prevent you from doing what is right!" Salvor Hardin
  Reply With Quote
Old 8th March 2010, 07:26 PM   #30
qsa is offline qsa  Germany
diyAudio Member
 
qsa's Avatar
 
Join Date: May 2007
Class H DIY good idea,...

check RMX 5050 schematic for DIY ideas...

I want spend my time to add Class H in Quasi NMOS Amp too and share experience with another DIY people,...actually i dont have much time for DIY
  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 01:37 PM
900w amp module for sale nigelwright7557 Swap Meet 0 10th July 2009 12:05 AM
About a very very simple class D PA amp gaetan8888 Class D 8 13th March 2009 03:21 PM
Class-d for a 1kw PA amp MikeHunt79 Class D 4 30th December 2007 07:19 PM
200w Amp + 900w Sub = explosion? 56k Warning Daemonicus Subwoofers 2 31st May 2006 05:30 AM


New To Site? Need Help?

All times are GMT. The time now is 05:44 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