Aleph 2 - The Final Build - Page 17 - 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 4th February 2013, 08:21 PM   #161
diyAudio Member
 
Join Date: Feb 2009
that seams about right. the sink kan handle much more then heatsinkUSA says.
i used 12" long. 4pc pr monoblock. and hey was at about 45C with 23C ambient.
no worries

just make sure you massure around 500mV across each source resistor.
  Reply With Quote
Old 17th October 2013, 04:05 PM   #162
wlowes is offline wlowes  Canada
diyAudio Member
 
wlowes's Avatar
 
Join Date: Mar 2007
Location: Toronto
Blog Entries: 9
Default How do they sound fully broken in?

Quote:
Originally Posted by Bakmeel View Post
The pleasure was fully mutual.... Thanks for all the help and great responses... Off to the next project (whatever that will be)
Beautiful job. A work of art with great community collaboration. DIY movement at its best.

Are you happy with the sound after they settled in?
  Reply With Quote
Old 19th October 2013, 12:46 PM   #163
diyAudio Member
 
Join Date: Jun 2008
Location: HaiPhong
Quote:
Originally Posted by kop89 View Post
I have just finished one monoblock of my Aleph 2. It makes good sound, but I am wondering whether there is something wrong with my build. I was expecting the heatsink to be scorching hot, but turning the amp on for more than 1 hour and measuring the temperature at one of the MOSFETs mounting bolt, it settles at only 56.7 degree C (around 20C ambient). The heatsinks are only warm and I can put my hands on the heatsinks forever.

My heatsink is the 10.080" profile from HeatsinkUSA:
10.080" - HeatsinkUSA, LLC Store

I am using 4 pieces of 9 inch long section per monoblock (3 MOSFET mounted on each 9 inch piece). It is guesstimated at 0.80 C/W/3 inch. So theoretically my setup is around 0.80/(4x3 inches) = 0.067 C/W.

More info on the build:
1kVA trafo
16 x 15000 uF electrolytics (2.7 mH inductor)
Power supply output at 50V
IRFP244 matched within 10mV
Parts BOM per kk-pcb (Pass Labs ALEPH-2 DIY amplifier PCB)

Maybe I should not worry about all these and just enjoy it.
firt ..did you build up a amplifier? or you think that you build up a radiator .
just check bias & AC gain ...and then enjoy it 01 week .. and then open it ... modify .. enjoy it... and then open it ... that DIY get fun.
  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
final aleph 3 sound test jeapel Pass Labs 4 16th May 2006 01:22 PM
Final Decision: which speaker to build? Figo Multi-Way 0 7th December 2003 11:59 PM
Aleph ... which one to build ? thylantyr Pass Labs 6 22nd August 2002 02:24 AM


New To Site? Need Help?

All times are GMT. The time now is 12:00 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