MOSFET Amplifier IRFP240/IRFP9240 - Page 39 - 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 20th February 2011, 09:47 AM   #381
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by engel dela pena View Post
sir apex,
what is the detail of this choke coil?
wire size,
core dia.
no.of turn.
This choke coil is not critical 12-14 turns, 1-1,5mm wire on 15mm dia coil.
  Reply With Quote
Old 20th February 2011, 12:59 PM   #382
diyAudio Member
 
Join Date: Apr 2010
Location: Singapore when I am not somewhere else
Quote:
Originally Posted by apexaudio View Post
Yes, but PRO signal from B500 will not activate cut out speakers on this protect. Anti-click and DC protection will work. PSU and Soft-Start will work with any amp. I try to find schematics.
Regards
Hey Miles, what is needed to activate the speaker cut on on this PSU-7 design, you say the PRO signal from the B500 does not work....why, can we make a change to the B500 or to the PSU-7 so that is does work....so glad I read this posting...
  Reply With Quote
Old 20th February 2011, 01:14 PM   #383
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by daveinsingapore View Post
Hey Miles, what is needed to activate the speaker cut on on this PSU-7 design, you say the PRO signal from the B500 does not work....why, can we make a change to the B500 or to the PSU-7 so that is does work....so glad I read this posting...
You must change over current detector on B500, use this circuit.
Attached Images
File Type: jpg APEX Over Current Detect.jpg (141.8 KB, 1228 views)
  Reply With Quote
Old 20th February 2011, 01:19 PM   #384
diyAudio Member
 
Join Date: Apr 2010
Location: Singapore when I am not somewhere else
Default Over current detector..

Quote:
Originally Posted by apexaudio View Post
You must change over current detector on B500, use this circuit.
thank you Miles...I had just looked at the original HV23 circuit and saw this detail, was about to compare it to the B500 circuit and see how it could be amalgameted...you are a gem Miles, will now do more work on the PCB to make this fit....my B500 pcb is looking quite busy now..but it is going to work well. thanks to you....ciao
  Reply With Quote
Old 21st February 2011, 04:09 PM   #385
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Default FAN Control

This circuit can be add to fan output on PSU7 to control FAN start at 60deg on heatsink.
Attached Images
File Type: jpg APEX Fan Control.jpg (73.4 KB, 1105 views)
  Reply With Quote
Old 21st February 2011, 04:57 PM   #386
Ar4 is offline Ar4  Latvia
diyAudio Member
 
Join Date: Apr 2010
Location: Latvia
Send a message via Skype™ to Ar4
Hello ApexAudio! I am interested of building MOSFET amplifier using one of your's schematics. As I already have 10x IRFP9140 and IRFP240, which circuit suits better for operation below -/+ 50V?
  Reply With Quote
Old 21st February 2011, 05:31 PM   #387
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by Ar4 View Post
Hello ApexAudio! I am interested of building MOSFET amplifier using one of your's schematics. As I already have 10x IRFP9140 and IRFP240, which circuit suits better for operation below -/+ 50V?
Do to post #122 in thread: DC Servo MOSFET Amplifier
Regards
  Reply With Quote
Old 21st February 2011, 06:09 PM   #388
Ar4 is offline Ar4  Latvia
diyAudio Member
 
Join Date: Apr 2010
Location: Latvia
Send a message via Skype™ to Ar4
Thanks!
  Reply With Quote
Old 23rd February 2011, 04:04 AM   #389
diyAudio Member
 
Join Date: Oct 2005
Quote:
Originally Posted by engel dela pena View Post
sir apex,
what is the detail of this choke coil?
wire size,
core dia.
no.of turn.
apex,
how does the triac protect operates?
does protect act after reaching db3 volt(about 30v)
what will happen if lo volt like 2n4991 use about 8v
  Reply With Quote
Old 23rd February 2011, 09:39 AM   #390
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by engel dela pena View Post
apex,
how does the triac protect operates?
does protect act after reaching db3 volt(about 30v)
what will happen if lo volt like 2n4991 use about 8v
Triac protect short speaker out to protect speaker from high DC voltage, and if circuit activate triac at lower voltage than 30V it's OK.
  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
IRFP240&IRFP9240 power amplifier schematic mos Solid State 31 26th June 2012 08:21 AM
IRFP240 / IRFP9240 MOSFETs danieljw Swap Meet 8 4th July 2009 01:51 AM
Wtb: Irfp240 / Irfp9240 folkeb Swap Meet 1 10th March 2009 10:18 AM
IRFP240 + IRFP9240 -- pairs jackinnj Swap Meet 1 2nd June 2006 02:22 AM
IRFP240 and IRFP9240 Wanted richeros Swap Meet 1 9th November 2002 12:38 PM


New To Site? Need Help?

All times are GMT. The time now is 10:46 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