Is this FET good to use into audio amplifiers? - 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 12th February 2009, 09:57 AM   #1
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Is this FET good to use into audio amplifiers?


If no good, why?

Please, inform the complementary, i have many FETs in my home and i do not know if i can match them to work as complementary.

What is the main characteristics i should observe into the datasheet to decide if they can work together? (studing N type and P type).

Is this mismatch related drain to source resistance something important to worry about?... some of them, for instance, having 0,47 ohms and others having even lower...or higher resistance.

Because of Dudainc kindness and also Anonimous kindness, now a days i have hundreds of power FETs in my home... also BGT power units and drivers.

Thank you,

regards,

Carlos
Attached Images
File Type: jpg is this good to audio.jpg (96.0 KB, 696 views)
  Reply With Quote
Old 12th February 2009, 10:02 AM   #2
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Can i use this one together the previous one?


I have many units... would be very interesting.

regards,

Carlos
Attached Images
File Type: jpg fotos 2926.jpg (57.1 KB, 497 views)
  Reply With Quote
Old 12th February 2009, 10:44 AM   #3
syn08 is offline syn08  Canada
Account disabled at member's request
 
Join Date: Aug 2005
Location: Toronto
These are decent vertical power mosfets. Although originally intended for switching, they will do a fair job in audio amps. The closest equivalents I can think of are IRF240/IRF9240
  Reply With Quote
Old 12th February 2009, 11:22 AM   #4
Nrik is offline Nrik  Denmark
diyAudio Member
 
Join Date: Feb 2005
Location: Copenhagen
Carlos
I cannot imagine that I am gonna say this to YOU, but......Try it!

Feedback should take care of whatever non-linearities there might be. Try them in maybe in these:
http://www.adam.com.au/cgpap/QuasiWeb/index.htm

...and tell us about it.

Henrik
  Reply With Quote
Old 12th February 2009, 11:26 AM   #5
Nrik is offline Nrik  Denmark
diyAudio Member
 
Join Date: Feb 2005
Location: Copenhagen
Grollins uses exactly this one and its P-channel in his 25W class A amp here:
The GR-25

...even without feedback! So these must be very good for audio.
  Reply With Quote
Old 12th February 2009, 11:28 AM   #6
sajti is online now sajti  Hungary
diyAudio Member
 
Join Date: Apr 2003
Location: Vác, Hungary
Can be useful in any N channel MOSFET amplifier.

Sajti

Ps.: Did You clean up the Fairchild warehouse?????
  Reply With Quote
Old 12th February 2009, 12:06 PM   #7
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Thank you Henrik, Sinesthesia and Satji


Yep.... a good idea is to try....but i would like to learn how to make a good choice of models searching for matched pair.

Thank you folks,

regards,

Carlos
  Reply With Quote
Old 12th February 2009, 01:46 PM   #8
diyAudio Member
 
megajocke's Avatar
 
Join Date: Jan 2003
I'd try to find something that has similar slope in the Vgs-Id characteristic (transconductance).
  Reply With Quote
Old 12th February 2009, 09:16 PM   #9
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
Default Re: Is this FET good to use into audio amplifiers?

Quote:
Originally posted by destroyer X


Please, inform the complementary...


To the extent that average vertical MOSFETs have complements, try the FQA12P20. Works nicely.

Grey
  Reply With Quote
Old 13th February 2009, 10:17 AM   #10
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Thank you....now i have more informations about


and i can try something.

Carlos
  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
The good, the bad, and the ugly OTL amplifiers Original Burnedfingers Tubes / Valves 46 9th November 2006 06:27 AM
IRFP90N20D Monster-Any good for Amplifiers? zox2003 Solid State 14 11th March 2005 02:17 PM
schematics for amplifiers, found good site NB23 Car Audio 0 12th June 2004 10:42 PM
pro amplifiers vs. home audio amplifiers bonsai171 Solid State 26 25th February 2004 08:24 PM
IC audio amplifiers jteef Solid State 8 21st July 2001 03:14 PM


New To Site? Need Help?

All times are GMT. The time now is 01:25 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