Replacing output transistors (mosfets) - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 25th October 2012, 01:42 AM   #1
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
Default Replacing output transistors (mosfets)

I have a small punch 55 here and a good set of IRF540 and IRF9540 that I found in my box of parts. Could I use these in it would replacing the other channel?

Is it okay if use these in it? With out replacing the other channel it still works.

Here's what it says on the fets

IRF540
H6 27


IRF9540
H6 31
N
__________________
Feel the PUNCH
  Reply With Quote
Old 25th October 2012, 01:55 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If it's your amp, you can install used parts. If this is for a paying customer or you intend to sell the amp, order and install new parts.
  Reply With Quote
Old 25th October 2012, 02:32 AM   #3
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
Yes it just my amp for my personal collection, but would it be reliable if I wanted to run it my self?
__________________
Feel the PUNCH
  Reply With Quote
Old 25th October 2012, 03:00 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
That's impossible to say without knowing what the replacement transistors had been subjected to or their age. The date code may be available in the datasheet but you still won't know how hard they've been driven.

If you don't abuse it, they will likely survive.
  Reply With Quote
Old 25th October 2012, 03:45 AM   #5
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
Those mosfets came from a punch 40.2 that I got a whole back it had a blown power supply but none of the outputs were damaged I had used one pair for testing a project amp and left the other two on the board. I wanted to use this punch 55.2 to run a 10" kicker comp single 4 ohm coil sub in a box I'm making. Or use it power speakers.

The parts are made by Harris semi because it has the 'H' printed on them.


Note: I installed them in and it so far it's playing ok I guess I have connected to some test speakers that are 6 ohms on each channel playing full blast. Reaches what I would consider normal operating temps? Hasn't shut off or anything.
__________________
Feel the PUNCH
  Reply With Quote
Old 25th October 2012, 04:49 AM   #6
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Not gonna get much power out of that amp at 6 ohms stereo bro.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 25th October 2012, 04:52 AM   #7
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
Quote:
Originally Posted by seankane View Post
Not gonna get much power out of that amp at 6 ohms stereo bro.
But do you know if it will be okay for my personal use?
__________________
Feel the PUNCH
  Reply With Quote
Old 25th October 2012, 05:48 PM   #8
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Well if it works it works. Like Perry said there is no telling how hard the used outputs you installed were driven. It may last a month it may last for years. Put it in your car and run it hard for a few weeks if it does not let you down I think it will be fine.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 25th October 2012, 07:40 PM   #9
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If it's your amp and you know how to repair it, try them. If they fail, you'll simply have to repair it again.
  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
Replacing mosfets with different/higher spec fets? ThyDntWntMusic Car Audio 22 21st December 2013 05:02 AM
Replacing My Memphis Audio ST-1000D blown output transistors. HELP!!! ALLMemphisCarAudio Class D 13 27th September 2012 02:58 AM
replacing output transistors on mcintosh 2100 power amp lizo Parts 3 28th December 2011 01:28 AM
replacing output transistors on mcintosh 2100 power amp lizo Parts 5 27th December 2011 06:22 PM
Replacing the Mosfets of the Aleph 2 Hydesg Pass Labs 5 26th March 2003 01:55 PM


New To Site? Need Help?

All times are GMT. The time now is 05:03 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