Has any one built this 1KW amp? - Page 11 - 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 12th August 2012, 10:56 AM   #101
diyAudio Member
 
Workhorse's Avatar
 
Join Date: Dec 2004
Quote:
Originally Posted by vedmitraa View Post
Paa ji Sat Shri Akal ,
Is the circuit on page1 post6 of this thread complete. Kya yeh naachees can give this circuit a try with your guidance.Planning to pu 16 pairs 15024 - 25 that is toatl 32 in output. will a 2.5 kva transformer will be enough for this amp.Is nachhese ki choti si work shop ka photo saath hai.regards
Uncle Andy is already giving it a try, you too can try it without any hassles.
  Reply With Quote
Old 12th August 2012, 03:55 PM   #102
diyAudio Member
 
kimberlator's Avatar
 
Join Date: Mar 2011
Location: El Centro CA
I'll give it a try and post results ASAP, i'll use complementary pairs of MJL4281A & MJL4302A from ON semiconductors along with MJE15034 & MJE15035, i'll keep you updated about progress of this new task, See ya....
  Reply With Quote
Old 12th August 2012, 04:06 PM   #103
diyAudio Member
 
Join Date: Mar 2011
Sir Kimberlator, kindly can you please post schematic how to connect the output complementary.
  Reply With Quote
Old 12th August 2012, 08:01 PM   #104
diyAudio Member
 
vedmitraa's Avatar
 
Join Date: Feb 2010
Location: agra uttarpradesh india
Sat Shree Akal again Paaji,
I have no more connection with Andrew Lebon. Wo aapki meharbanion es bahut unchi chees ban gaya hai success has got his mind.This is what I have done recently.Meter is showing Peak output voltage with 2 ohm load .Rail voltage 85-0-85.Continuos output voltage into 1 ohm load with .8 voltage music signal reached upto 43 volt. My aim is to achieve 60 voltage undistorted into .5 ohm load
Attached Images
File Type: jpg Copy of 100_1716.JPG (274.7 KB, 415 views)
  Reply With Quote
Old 13th August 2012, 06:11 AM   #105
diyAudio Member
 
Workhorse's Avatar
 
Join Date: Dec 2004
Quote:
Originally Posted by vedmitraa View Post
I have no more connection with Andrew Lebon. Wo aapki meharbanion es bahut unchi chees ban gaya hai success has got his mind.
What do you mean to say?

Zara khul ke bata, mamla kya hai?
  Reply With Quote
Old 13th August 2012, 08:16 AM   #106
AJT is offline AJT  Philippines
diyAudio Moderator
 
AJT's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
Quote:
Originally Posted by vedmitraa View Post
Sat Shree Akal again Paaji,
I have no more connection with Andrew Lebon. Wo aapki meharbanion es bahut unchi chees ban gaya hai success has got his mind.This is what I have done recently.Meter is showing Peak output voltage with 2 ohm load .Rail voltage 85-0-85.Continuos output voltage into 1 ohm load with .8 voltage music signal reached upto 43 volt. My aim is to achieve 60 voltage undistorted into .5 ohm load
is that a leach lo-tim amp you have there?
__________________
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 13th August 2012, 09:37 AM   #107
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
Other than the lack of feedback from the driver stage, and the lack of diodes in the bias circuit, it sure looks like a Leach.
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 13th August 2012, 12:49 PM   #108
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
multiplying the number of outputs will not make a high power amplifier
amplifier of this range of power will need proper protection

---one may calculate how much current will be drawn from this circuit per rail and then realize that a ""wire "" of 1.5mm cannot and will not deliver this amount of current

--Then again there is so many transistors placed in such a proximity in a relatively thin pcb that will actually warm each other up .... the result will be that even if a vent is used it will be not possible to cool down the amp ....fins are too small ...

---It should be plenty more ....
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 13th August 2012, 12:56 PM   #109
diyAudio Member
 
Join Date: Apr 2004
Location: manila, philippines
Yes, It is sure a leach amp alright..look at the background schematic. originally its a 700w 16TR design but he doubles it.
  Reply With Quote
Old 13th August 2012, 01:53 PM   #110
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
But D.Self shows us that doubling the output stage lowers the distortion, even into the same loading.
Look at his Blameless and compare to the Load Invariant.

But, using 1943/5200 at high voltage is a complete waste of semiconductor devices.
No matter how many one uses, there are far better devices available that can work well at the higher voltages. These higher SOAR devices can reduce the required numbers of output BJTs by a factor of at least 2 and often better than a factor of 3.
__________________
regards Andrew T.

Last edited by AndrewT; 13th August 2012 at 01:56 PM.
  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
Who has built their own? markp Solid State 43 3rd August 2014 09:10 AM
Hi! And I built one too... The RB Chip Amps 4 13th March 2009 09:12 AM
i built these a while ago and roystr Full Range 11 10th November 2005 12:49 PM
Anyone built this amp? JojoD818 Solid State 26 19th August 2003 11:32 AM


New To Site? Need Help?

All times are GMT. The time now is 04:05 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