Mosfet mix on Aleph - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

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
Reply
 
Thread Tools Search this Thread
Old 11th January 2002, 10:56 AM   #1
diyAudio Member
 
Join Date: Oct 2001
Location: Brazil
Default Mosfet mix on Aleph

I have problem to obtain all irfp240 so I think if is possible put another type in the current source (i.e. irfp250). I have read on others threads that problem is input capacitance. This affect current source on Aleph?
__________________
Matheus
  Reply With Quote
Old 11th January 2002, 05:33 PM   #2
hifi is offline hifi  Sweden
diyAudio Member
 
Join Date: Mar 2001
Location: sweden
They have double the capacitance i have once asked NP himself in an older thread they would certainly work but he did not know how the would sound...better? worse? ..the same?...just test them

;-)

/micke
  Reply With Quote
Old 11th January 2002, 07:21 PM   #3
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
The 250's behave a lot like two 240's in parallel. They
work, and experience says that the bottom end improves,
but the top end gets a little darker. Not necessarily
objectionable. In my opinion it improves an Aleph 3 slightly,
does not work well in a 1.2.
  Reply With Quote
Old 11th January 2002, 09:31 PM   #4
hifi is offline hifi  Sweden
diyAudio Member
 
Join Date: Mar 2001
Location: sweden
okie... im sorry to have miss qouted you but i believe that you said you hadnt tested it...well it was quite a long time ago..


The 250 has a much higher capacitanc i guess that is what makes the sound darker and it not suitable for the 1,2 to high a capacitance..

/micke
  Reply With Quote
Old 12th January 2002, 11:30 PM   #5
diyAudio Member
 
Join Date: Oct 2001
Location: Brazil
Thanks all! (specially Mr. Pass)

But my question is about to use IRFP240 in the path signal (Am I wrong?) and the IRFP250 in the current source.
(English isn't my native language)
__________________
Matheus
  Reply With Quote
Old 14th January 2002, 07:09 PM   #6
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Sure, it'll work fine.

I did recently try the 250's, just to see, but I don't have
a compelling reason to go to them. I get more dissipation
capability off of 240's in parallel.
  Reply With Quote
Old 15th January 2002, 11:43 PM   #7
diyAudio Member
 
Join Date: Oct 2001
Location: Brazil
Thank you Mr. Pass. I am finishing a copy of a kind of Aleph4. I expect you accept the pictures in your site's gallery.
__________________
Matheus
  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
WTB: Matched mosfet for the Aleph 1.2 folkeb Swap Meet 1 27th January 2006 04:00 PM
Aleph 5 (Mosfet Matching) billy Pass Labs 3 17th January 2003 02:18 PM
MTW35N15E mosfet in Aleph? 2002tii Pass Labs 11 28th December 2002 09:21 PM
Aleph 5 mosfet substitutions gregjpeters Pass Labs 2 7th November 2002 06:07 PM
which mosfet would be the best choice får aleph 4?? hifi Pass Labs 2 23rd May 2001 08:10 PM


New To Site? Need Help?

All times are GMT. The time now is 06:28 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