F5 with IRFP9140 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

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
Thread Tools Search this Thread
Old 8th September 2010, 04:30 PM   #1
frags is offline frags  Canada
diyAudio Member
Join Date: Aug 2009
Default F5 with IRFP9140

I'm wondering if somebody uses IRFP9140 instead of IRFP9240 in F5.
According to the specs IRFP9140 is closer to IRFP240 than IRFP9240 in terms of max current, transconductance and input capacitance.
Plus it's two times cheaper on digikey.

  Reply With Quote
Old 8th September 2010, 04:57 PM   #2
AndrewT is online now AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
the irf240/irf9140 are reputed to be a far better matching pair.

It is worth trying this. The F5 voltage suits the lower voltage rating of the 9140.
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 8th September 2010, 05:13 PM   #3
frags is offline frags  Canada
diyAudio Member
Join Date: Aug 2009
Thank you, AndrewT. I will try.

PS. They have a bit different Normalized On-Resistance vs. Temperature curves but gradients are the same in range 50-100C.
It should not affect thermal stability I guess.

Last edited by frags; 8th September 2010 at 05:18 PM.
  Reply With Quote


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
F5 Williams Audio Pass Labs 9 11th June 2010 09:13 PM
I need Help with my F5.... rtate Pass Labs 15 1st December 2009 11:07 PM
F5 Help Needed vdi_nenna Pass Labs 84 2nd October 2009 02:33 AM
Thanks for the F5! CBRworm Pass Labs 2 13th September 2009 09:34 PM
Anybody help with F5? yammy1688 Pass Labs 2 28th October 2008 03:50 PM

New To Site? Need Help?

All times are GMT. The time now is 04:31 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2