Elektor Current Dumper Op-Amp power Amplifier - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Elektor

Elektor News and offers from Elektor Magazine

Reply
 
Thread Tools Search this Thread
Old 26th March 2006, 01:16 AM   #1
Dusk is offline Dusk  United States
diyAudio Member
 
Dusk's Avatar
 
Join Date: Jul 2003
Location: Hendrix land
Smile Elektor Current Dumper Op-Amp power Amplifier

Hi Everyone
I was side-tracked by a London Power Amplifier DIY project....it was a all tube guitar pre-amplifier i finished a few weeks ago and it is GREAT now about the Elektor amplifier ihave just completed a proto type and it sounds very very good as i said....the last time i was up here it will be for guitar . I used the IRF MOSFETS as Quais suggested....but instead of the IRFP240 I USED A IRFP9240 and IRFP244 the current is 12amp and 15amp much closer . I made the proto on vector board it's nothing to look at ....i make a pic later.......but what i really want to say is THANKS Quasi......for the schematic ...and all others for your help

Dusk
ps i have picked up some radio stations on the amp.......but a RC circuit should fix this
  Reply With Quote
Old 26th March 2006, 09:21 PM   #2
Dusk is offline Dusk  United States
diyAudio Member
 
Dusk's Avatar
 
Join Date: Jul 2003
Location: Hendrix land
Smile IRFP9240 and IRFP244

Hello again

I used two pair of these V-Mosfet in my prototype of op-amp input/ mosfet power stage amplifier and as i had said their current are close(12a &15amp) i got this ideal from Kevin O'Connor of London Power Amplifier.........has anybody used them like this in their amplifier.......and by the way Mr. has a killer all-tube pre-amp for guitar diy from his book.....i know this is not a tube forum.....but it is very cool....imho......also has anyone made the Elektor op-amp base current power amplifier circuit if so pleaselet me aboutyour thoughs on it's sound...etc
my final version will be a 120watts per side monster and since it will be used as a guitar power amplifier .....iwill put in clipping ,overheating and other protection circuits for a hard driving rough life amplifier.

peace
  Reply With Quote
Old 26th March 2006, 09:24 PM   #3
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Interesting. Can you post a link to the schematic?

/Hugo
  Reply With Quote
Old 26th March 2006, 09:33 PM   #4
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
http://www.diyaudio.com/forums/showt...070#post694070
__________________
The buck stops Here
  Reply With Quote
Old 26th March 2006, 09:36 PM   #5
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Thanks Jacco.

/Hugo
  Reply With Quote
Old 26th March 2006, 10:43 PM   #6
Dusk is offline Dusk  United States
diyAudio Member
 
Dusk's Avatar
 
Join Date: Jul 2003
Location: Hendrix land
Smile The Elektor current-dumper or tube pre amp ??

Hi Netlist
For the Elektor current Dumper power amplifier....i got it from Quasi.....he is on this froum and if you want the schematic for the all-tube guitar it came out of Kevin O"Connor's book "Tonnes Of Tone" at amps@londonpower.com since it is copy-righted i don't know if i can post it here????

Peace


....oh i see you wanted the OP-AMP/Mosfet thingggy. good
in my version iupped the power supply to +/- 55 vdc and....i may even go further and try for 150watt/8 ohm per side using 3pair of mosfets...these cost very over here. (in the proto i used 2 pair) also i read about using other op-amp chip in the front-end........iam open to ideals.......also would love any other ideal on improving circuit of the amplifier........or others who have made this type of power amplifier circuit with mosfets IRF OR Hitachi. This is a hyrid circuit easy to make.....also i dig mosfets in a power amplifier......unlike my tube amplifiers.......don't have to replace them$$$$$$$$$$$$$$$$$$$$$$$$$$$ if kept in their SOA.
  Reply With Quote
Old 26th March 2006, 11:00 PM   #7
forr is offline forr  France
diyAudio Member
 
forr's Avatar
 
Join Date: Dec 2004
Location: Next door
This Elektor schematics just adds bipolar transistors to a circuit emanating from Siliconix (AN83-5).
  Reply With Quote
Old 27th March 2006, 02:09 AM   #8
Dusk is offline Dusk  United States
diyAudio Member
 
Dusk's Avatar
 
Join Date: Jul 2003
Location: Hendrix land
Hi Forr
I looked for the Siliconix An83-5 on the net and could not it. Do you have a link??

Dusk
  Reply With Quote
Old 27th March 2006, 05:01 PM   #9
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Default Re: The Elektor current-dumper or tube pre amp ??

Quote:
Originally posted by Dusk
if you want the schematic for the all-tube guitar it came out of Kevin O"Connor's book "Tonnes Of Tone"
Better not post it then. Thanks for the info.

/Hugo
  Reply With Quote
Old 28th March 2006, 12:19 AM   #10
forr is offline forr  France
diyAudio Member
 
forr's Avatar
 
Join Date: Dec 2004
Location: Next door
Dusk
---I looked for the Siliconix An83-5 on the net and could not it. Do you have a link??---
I'll scan it when back home, you'll have to wait about a week to get it.
  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
Compact Power Amplifier from Elektor jazzpeter65 Solid State 131 5th June 2014 02:17 PM
Current-Dumper gareth Solid State 7 2nd April 2008 08:43 PM


New To Site? Need Help?

All times are GMT. The time now is 03:49 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