Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Build This MoFo!
Build This MoFo!
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 9th September 2019, 05:27 PM   #2241
TYM is offline TYM  France
diyAudio Member
 
TYM's Avatar
 
Join Date: Jun 2019
Location: Lyon
Good morning gentlemen,
concerning mounting the transistor on the heatsink surface:
I can see, in all your pictures, two possibilities:
- press on the heatsink with a small beam or
- fix with a screw through a washer
Which of this option is the most effective? Maybe a beam of wood for a better insulation?
Thank you
Musically yours
  Reply With Quote
Old 9th September 2019, 08:22 PM   #2242
dliscomb is offline dliscomb  United States
diyAudio Member
 
dliscomb's Avatar
 
Join Date: Nov 2018
Location: US, NY, 12123
TYM, unfortunately, I think the answer is 'it depends'
I don't pretend to be a materials science major with a minor in thermodynamics, but for the purposes of heat conduction, either approach will work.

- If you're building a one-off to see how it performs, then the 'beam' mount seems like it'd be easier. I can imagine bolting the beam to your heat sink without making any holes in the heat sink. It would also allow you to try more easily different transistors, if that's your thing. The beam really shouldn't be the heat conductor, but should be sturdy enough to cause the transistor to have even contact across its reverse face.
- If you're building the amp to be The Power Amp for you, and you are comfortable using a tap to create screw threads in your heat sink, then the fixed screw method might be better, as a tidier and more 'permanent' solution. The washer + lock washer is pretty all required, as the lock washer helps you regulate the pressure, and the washer spreads the pressure out over the entire body of the transistor. (props to ZenMod for that advice)
Kind regards,
Drew
  Reply With Quote
Old 9th September 2019, 10:31 PM   #2243
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Build This MoFo!
hardly anything of my own invention there ........ I'm just hysterical enough , to scream all the time what's proper engineering practice from Yore - split washer and big washer , wherever you have heat-cycling present

__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 10th September 2019, 11:25 AM   #2244
TYM is offline TYM  France
diyAudio Member
 
TYM's Avatar
 
Join Date: Jun 2019
Location: Lyon
Thank you Drew and Zen Mod for your support...
  Reply With Quote
Old 10th September 2019, 11:44 AM   #2245
Dennis Hui is offline Dennis Hui  Canada
Hoopy Frood
diyAudio Member
 
Join Date: Aug 2002
Location: Toronto, Canada
Build This MoFo!
Nice Mofo you got there Drew. Congratulations!
__________________
We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002
  Reply With Quote
Old 10th September 2019, 05:14 PM   #2246
TYM is offline TYM  France
diyAudio Member
 
TYM's Avatar
 
Join Date: Jun 2019
Location: Lyon
Dear gentlemen, do you know when the PCB will be available on the DIYaudio store?
  Reply With Quote
Old 11th September 2019, 06:08 AM   #2247
meanman1964 is offline meanman1964  Belgium
diyAudio Member
 
meanman1964's Avatar
 
Join Date: Oct 2006
Location: Belgium the land of chocolate
I've some boards etched .
  Reply With Quote
Old 11th September 2019, 11:32 AM   #2248
Michael Rothacher is offline Michael Rothacher  United States
AudioMaker.Tech
diyAudio Member
 
Michael Rothacher's Avatar
 
Join Date: May 2001
Build This MoFo!
I just sent files to management a few days ago.
__________________
Visit AudioMaker.Tech
  Reply With Quote

Reply


Build This MoFo!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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Adapt Polk Audio R20 for Classix II build or build box? unpredictableape Multi-Way 3 3rd April 2017 07:25 AM
Power Acoustik MOFO 10, need box dimensions Spuddd Subwoofers 2 5th January 2017 10:46 AM
LJM MX50-SE - Build Log Gallery & My Build Progress dakku Solid State 3 28th October 2016 08:49 AM
Do i need to build main supply (240v) filter?Or build power distribution? thomgun_lc Chip Amps 9 16th September 2005 09:52 AM
Power Acoustik MOFO-10 Sub subwo1 Car Audio 1 24th October 2003 08:12 AM


New To Site? Need Help?

All times are GMT. The time now is 10:44 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki