Go Back   Home > Forums > Commercial Sector > Vendor Forums > Elektor

Elektor News and offers from Elektor Magazine

Reply
 
Thread Tools Search this Thread
Old 16th March 2011, 05:20 AM   #1
routhun is offline routhun  United States
diyAudio Member
 
Join Date: Mar 2005
Location: Sunnyvale
Default Is it worth building this Elektor NMOS BUZ23 amplifier

Always fascinated by this Elektor amp from late 80s, but never had access to the parts etc to build it. Recently found this schematic again on the web. Idea looks simple, drive the NMOS with a differential pair. Since it uses same transistor types, NPN/PNP, finding the matched devices can be easy. But this one uses a complex bias stabilization and temperature protection schemes. Don't have any idea about the sound quality etc? Has anyone build this amp? what is the experience?

This uses NMOS devices, BUZ23. I am not sure if they are still available, may be they can be replaced by IRFP devices.
Attached Images
File Type: gif Elektor-Amplifier-mosfet-hifi-240w-buz23.gif (92.0 KB, 492 views)
__________________
routhun
  Reply With Quote
Old 8th April 2012, 03:18 PM   #2
yd1cvj is offline yd1cvj  Indonesia
diyAudio Member
 
Join Date: Apr 2012
Hi routhun,
Did you make it ?
  Reply With Quote
Old 17th May 2013, 07:03 AM   #3
diyAudio Member
 
Join Date: Jan 2011
Location: Nis, Serbia
Default Build it!

Quote:
Originally Posted by routhun View Post
Always fascinated by this Elektor amp from late 80s, but never had access to the parts etc to build it. Recently found this schematic again on the web. Idea looks simple, drive the NMOS with a differential pair. Since it uses same transistor types, NPN/PNP, finding the matched devices can be easy. But this one uses a complex bias stabilization and temperature protection schemes. Don't have any idea about the sound quality etc? Has anyone build this amp? what is the experience?

This uses NMOS devices, BUZ23. I am not sure if they are still available, may be they can be replaced by IRFP devices.
I made those amps for sale,both for hifi and PA.Very reliable amp, sounds good.Stabilization is simple in fact,an NTC thermistor is inserted in second diferential pair's current source to decrease bias for output mosfets.I used irfp250,irfp240,irf540,irf640,everything works.
  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
Substitute for BUZ23? Vivek Parts 5 21st December 2012 07:46 AM
NMOS Amplifier Havenwood Solid State 10 28th February 2012 09:14 AM
Worth building a keyboard amp? amt Instruments and Amps 18 5th November 2010 07:33 PM
what speaker designs are actually worth building? demogorgon Multi-Way 11 5th May 2005 10:03 PM


New To Site? Need Help?

All times are GMT. The time now is 08:51 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