F5 Turbo Builders Thread - Page 45 - 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 28th September 2012, 11:50 PM   #441
diyAudio Member
 
Join Date: Feb 2009
buzz. it is the 10.080" heatsink USA's sinks?
the heat spreaders looks great by the way
  Reply With Quote
Old 28th September 2012, 11:59 PM   #442
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
yup
__________________
...Shape the sound , Man!
  Reply With Quote
Old 29th September 2012, 12:05 AM   #443
diyAudio Member
 
Join Date: Feb 2009
buzz. those sinks are extremely good. regrding what they claim
i have the same sinks to. 16pc 6" long

and 0.80c/w at 3"? forget it more like 0.50c/w
  Reply With Quote
Old 29th September 2012, 12:12 AM   #444
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
These are 18" long by 6" tall. They are disspating 100W easy in poor configuration. With this, 150W seems easy
__________________
...Shape the sound , Man!
  Reply With Quote
Old 29th September 2012, 12:15 AM   #445
diyAudio Member
 
Join Date: Feb 2009
18" long???
by long. i mean high (amp wise)
  Reply With Quote
Old 29th September 2012, 12:16 AM   #446
diyAudio Member
 
Join Date: Feb 2009
or have you cut them down?
  Reply With Quote
Old 29th September 2012, 12:31 AM   #447
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
I have two 10.08 profiles cut to 6" and attached end to end to make 18". I trimmed off some to mate them together evenly and limit overall length.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 29th September 2012, 01:43 AM   #448
diyAudio Member
 
Join Date: Feb 2009
aha then it makes sence i have mine trimmed off to to 250mm wide
so only 6mm pr sink
  Reply With Quote
Old 29th September 2012, 04:58 PM   #449
lhquam is offline lhquam  United States
diyAudio Member
 
Join Date: Mar 2010
Location: Olalla, Oregon: Land of the 100 Valleys
Buzz: It looks like you are gonna listen to a lot of heavy metal.

How good is the thermal interface between the heatsinks and the spreader? Do you use any goop or just bolts?

Quote:
Originally Posted by buzzforb View Post
Here ya go. Rough idea. Times two should give about 7-8" in the bottom of the case. Enough for big trafo.
  Reply With Quote
Old 29th September 2012, 05:52 PM   #450
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Here is current F5T V2 build. It is on similar, but slightly smaller heatsinks. THey are only about 16" deep x 6" high x 2 1/2" fin. As you can see, the fets are concentrated in the middle on a heat spreader. They are biased at about 400mV+, making bias about .85 to
.9A per fet. The sinks are well within 10 second hot rule. Last I measured, they were 37C. Checked fets and they are a degree or two higher, so coupling is good. I haev nothig but silicon goop between spreader and sink. I feel like i could easily put another pair on these sinks. With the newer setup pictured above, I have deeper sinks with longer fins. Also the heat-spreader is couple inches longer, with big ol 1" section for mounting the fets. I will have four fets on 1 side and will consider dropping the diodes and biasing higher than 1A. Wish I could cram more on the sink, but oh well. Already have way more power than I need.
Attached Images
File Type: jpg 002.JPG (730.4 KB, 447 views)
File Type: jpg DSC_0088.JPG (774.7 KB, 424 views)
File Type: jpg DSC_0089.JPG (812.0 KB, 406 views)
__________________
...Shape the sound , Man!

Last edited by buzzforb; 29th September 2012 at 05:54 PM.
  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
F5 Turbo Circuit Boards chchyong89 Pass Labs 2363 27th September 2014 03:10 PM
B1 builders thread Bas Horneman Pass Labs 696 14th July 2014 01:57 PM
F5 Turbo is posted Nelson Pass Pass Labs 635 6th April 2014 11:51 AM
F5 turbo problems Rob Dingen Pass Labs 17 11th January 2013 09:38 PM
F5 Turbo ............. if only !!!!!! a.wayne Pass Labs 23 21st January 2012 03:24 AM


New To Site? Need Help?

All times are GMT. The time now is 12:25 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