modified proj. 68 (esp) - could this work - 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 27th July 2002, 05:12 PM   #1
diyAudio Member
 
Join Date: Jul 2002
Location: germany
Question modified proj. 68 (esp) - could this work

hi,

i have modified project68 from esp. it should deliver around 540watts in 2ohms. i have used the mj15003/4 as output devices. each side could handle 1000watts (Pd), makes 2000w total Pd. with 1000w for 500w out i hope i'm on the right side to drive 2 ohms. and i would use a 2000watts trafo for a stereo amp.

here is the circuit:
Click the image to open in full size.

regards

lenti
  Reply With Quote
Old 30th June 2004, 10:46 PM   #2
diyAudio Member
 
Join Date: Jun 2004
Location: Knoxville
you had better check the breakdown voltage for your BC546B transistors, (ECG 123AP) same as 2N3904, 2N4401, 2N4403...

  Reply With Quote
Old 30th June 2004, 11:17 PM   #3
sss is offline sss  Israel
diyAudio Member
 
sss's Avatar
 
Join Date: Jul 2003
Location: Israel , haifa
Send a message via ICQ to sss
also mj15003/4 rated at 140V max , u got 150
  Reply With Quote
Old 1st July 2004, 12:15 PM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
You also need to change the driver transistors from MJ15030/31 to something much beefier. They will smoke very quickly with 1 ohm emitter resistors and 75V rails. I also would add another pair of o/p devices, unless you are not using any insulating washers on the transistors (so separate sinks for NPN and PNP) and a very well cooled heatsink.
  Reply With Quote
Old 1st July 2004, 12:46 PM   #5
moamps is offline moamps  Croatia
diyAudio Member
 
Join Date: Oct 2002
Location: Croatia
And PNP output devices aren't correct polarisated (reverse collectors and emitters)
  Reply With Quote
Old 2nd July 2004, 09:00 AM   #6
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
YAWN !

Two year old thread.
  Reply With Quote
Old 2nd July 2004, 01:54 PM   #7
fab is offline fab  Canada
diyAudio Member
 
fab's Avatar
 
Join Date: Mar 2004
Location: Canada
The project 68 has already been updated to include higher power with warnings about the implementation. Take a look again on the site.

Fab
  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
MOSFET sub. for ESP proj. 101 lawbadman Solid State 4 5th September 2008 09:59 AM
Soundwesthost proj.33 problem!! Ryssen Solid State 9 14th February 2007 03:11 AM
esp proj 19 lives! 8 channels!!! Mattyo5 Solid State 20 7th October 2002 12:42 AM


New To Site? Need Help?

All times are GMT. The time now is 12:53 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