Questions about 400W mono amplfier - 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 22nd June 2012, 09:27 AM   #1
diyAudio Member
 
Join Date: Jun 2010
Default Questions about 400W mono amplfier

Hi to all friends

I want to build two pcb of these to have 2x400W amplifier

http://postimage.org/image/fwsb20b93/

What do you think , how much power can i expect on 4 ohm load and how much on 8 ohm load ?? And how much THD can i expect on 4 ohm and how much on 8 ohm

I expect real answers , cheers

Last edited by DANIEL SPASOVSKI; 22nd June 2012 at 09:34 AM.
  Reply With Quote
Old 22nd June 2012, 10:42 AM   #2
Banned
 
Join Date: Jan 2005
As that circuit is class B and looks like from the ampletos website, i'd say 0.5-5% THD.

And only four sets of 2SC5200 and 2SA1943 is not quiite enough for 400 watts into 4 ohms at the rail voltages specified, 6 pairs will be better and 8 pairs will be even better, at 10 pairs you'll have a reliable amp.
  Reply With Quote
Old 22nd June 2012, 11:30 AM   #3
diyAudio Member
 
Join Date: Nov 2010
That is a very mediocre circuit. Read Bob Cordell's book and learn why.
The schematic is not really complete, you can do better with another amp.

Best wishes
David

Last edited by Dave Zan; 22nd June 2012 at 11:41 AM.
  Reply With Quote
Old 22nd June 2012, 11:37 AM   #4
diyAudio Member
 
Join Date: Jun 2010
Then please give me schematic for one mono amplifier that gives 400W RMS on 4 ohm load
  Reply With Quote
Old 22nd June 2012, 11:57 AM   #5
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
A TIP 42 won't work very well at 75V, nor will the D718/B688.
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 22nd June 2012, 12:15 PM   #6
AJT is offline AJT  Philippines
diyAudio Moderator
 
AJT's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
agree with djk on the Vceo issue......

we are given half of the amp, with the rail shown drop further with load? i am not aware of any convention when showing rail voltages on a schematic, is that the unloaded rail of fully loaded rail?

Click the image to open in full size.
__________________
the best advertisement for a good audio design is the number of diy'ers wanting to build it after all the years....never the say so of so called gurus....
  Reply With Quote
Old 22nd June 2012, 07:00 PM   #7
Tajzmaj is offline Tajzmaj  Slovenia
diyAudio Member
 
Join Date: Mar 2011
Location: Ljubljana
Check this out.
500W PA amplifier with Limiter
900W H-class PA Amp with Limiter
Cheers
  Reply With Quote
Old 23rd June 2012, 11:18 PM   #8
AJT is offline AJT  Philippines
diyAudio Moderator
 
AJT's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
too small can't see very well...
__________________
the best advertisement for a good audio design is the number of diy'ers wanting to build it after all the years....never the say so of so called gurus....
  Reply With Quote
Old 24th June 2012, 07:45 AM   #9
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Attach your pics and make them at least double the pixel width, preferably near 800 by 600. 180 by 129 just does not work for me.
__________________
regards Andrew T.
  Reply With Quote
Old 24th June 2012, 08:24 AM   #10
diyAudio Member
 
Join Date: Jun 2010
I upload the pictures again I think that this time they are okey
Now , i want to know how much RMS power gives each separately , and which has smallest THD . Im gonna aprecciate your answers

400W Amplfier Circuit - View image: 400 W Amplfier circuit

Antoher 400W Amplfiier Circuit - View image: Another 400 W Amplfier circuit

350W Amplfier Circuit - View image: 350 W Amplifier circuit

600W Amplifier Circuit - View image: 600 W Amplfier circuit

200W Amplifier Circuit - View image: 200 W Amplfiier circuit
Attached Images
File Type: png 400_W_Amplfier_circuit 1.png (89.4 KB, 80 views)
File Type: png Another_400_W_Amplfier_circuit 2.png (152.4 KB, 89 views)
File Type: png 350_W_Amplifier_circuit 3.png (83.2 KB, 78 views)
File Type: png 600_W_Amplfier_circuit 4.png (94.9 KB, 67 views)
File Type: png 200_W_Amplfiier_circuit 5.png (84.9 KB, 67 views)
  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
Virtual breadboard of a mono CMOY. Have a few questions alfa147x Chip Amps 13 3rd April 2012 05:55 PM
6L6 mono amp questions rickl Tubes / Valves 27 10th November 2005 03:57 AM
LM3875 dual mono kit - a few questions. quickshift Chip Amps 17 23rd August 2005 12:43 PM
Dual mono questions revell Chip Amps 0 27th August 2004 03:41 PM


New To Site? Need Help?

All times are GMT. The time now is 04:53 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