F4 power amplifier - Page 315 - 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 1st October 2011, 01:18 PM   #3141
cviller is offline cviller  Denmark
diyAudio Member
 
cviller's Avatar
 
Join Date: Dec 2005
Location: Copenhagen
Blog Entries: 2
No, it means that the footprints are on top of each other (with different leg spacing) and you can only install one capacitor and only one resistor.
  Reply With Quote
Old 1st October 2011, 01:58 PM   #3142
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
You say in the blog that the Fairchild parts are standard, Is this true or is this a personal decision? Has anybody compared the two? IRF vs FQp
  Reply With Quote
Old 1st October 2011, 02:06 PM   #3143
generg is offline generg  Germany
dog dead, me alive
diyAudio Member
 
generg's Avatar
 
Join Date: Jul 2009
Location: Near Frankfurt
@ cviller, thanks now I understand fully......!

@buzzforb jackinnj wrote in his shop some time ago when the Fairchild were still available, that the IRF sound a bit more warm!
__________________
and the First Wtt is......a really First Class PSS Idea
  Reply With Quote
Old 1st October 2011, 02:11 PM   #3144
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Good that is what i have. I also have some 2sj162/2sk1058, but they are laterals and dont think they would be a good drop in. Generg, If you like BA-3, take a look at Juma's version of F5 preamp in post #42 of his thread. Accuracy of the F5 coupled to sweet F4.

F5 with 2SK2013/2SJ313

It will be interesting to see if Nelson maintains the no feedback approach with balanced version of BA-3. Don't have all the stuff to finish BA-3 FE, so I will have to wait until next week.
  Reply With Quote
Old 1st October 2011, 02:17 PM   #3145
cviller is offline cviller  Denmark
diyAudio Member
 
cviller's Avatar
 
Join Date: Dec 2005
Location: Copenhagen
Blog Entries: 2
Papa uses fairchild in his amps instead of IRF because the fairchild devices give less distortion. I use IRF because that is what I have.
  Reply With Quote
Old 1st October 2011, 02:18 PM   #3146
cviller is offline cviller  Denmark
diyAudio Member
 
cviller's Avatar
 
Join Date: Dec 2005
Location: Copenhagen
Blog Entries: 2
And the problem is only related to the P type IRFs.
  Reply With Quote
Old 1st October 2011, 02:23 PM   #3147
generg is offline generg  Germany
dog dead, me alive
diyAudio Member
 
generg's Avatar
 
Join Date: Jul 2009
Location: Near Frankfurt
O.k., I am a bit tired to build amps at the moment, in the last two years I started with F5, the complete FW series, Burning Amp series, many Alephs, J2 clones, M2 transformer clones......... After some time you loose impression what is better or worse and I accustomed to many sounds....

Now i have to relax a bit....... Und I just enjoy the new toy to measure distortion with all the parts in the basement...
__________________
and the First Wtt is......a really First Class PSS Idea
  Reply With Quote
Old 1st October 2011, 02:24 PM   #3148
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
Blog Entries: 7
yep, M2 uses fairchilds, and I think one of the reviews of the PASS LABS product showed them too.
__________________
Last 2014 Salas GB, On Order|F5TC Boards and power supplies available PM| Hot-Rod DCB1 boards and kits available PM
  Reply With Quote
Old 1st October 2011, 02:25 PM   #3149
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Enjoy!
  Reply With Quote
Old 1st October 2011, 02:25 PM   #3150
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Quote:
Originally Posted by Tea-Bag View Post
yep, M2 uses fairchilds, and I think one of the reviews of the PASS LABS product showed them too.
Where can one get these fets?
  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
Rockford Fosgate Power 20001 bd amplifier power rating?? pachoorion Car Audio 8 8th May 2011 11:49 PM
Power transformers versus amplifier output power..what is your option? destroyer X Solid State 38 9th May 2009 06:23 PM
McIntosh Power Amplifier Power Guard johnnyrt Solid State 2 23rd August 2007 11:22 PM
Output power for a power amplifier Progg70 Solid State 33 10th September 2006 09:44 AM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality MARAVILLASAUDIO Class D 1 5th November 2004 05:06 PM


New To Site? Need Help?

All times are GMT. The time now is 07:37 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