LM3886 T vs TF (simple question, not an argument) - Page 2 - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 21st January 2007, 12:10 PM   #11
diyAudio Member
 
Join Date: Mar 2004
Location: Arkansas
When using the T form factors, I've found that thin kapton
insulators do a fine job.
Thermal resistance can be as low as 0.1. Better than mica.
Better than silpad, better than aluminum oxide. And, it's
reuseable. Hard to beat! Especially when you can buy it cheap.

Better yet, mount the T directly to a large heat speader...
and then insulate and mount the spreader to your heat sink
using Kapton. The larger area of contact will lower the thermal
resistance and transfer more heat.
Also the spreader will add additional mass, whereby it adds
another level of safety by protecting the junction temps during
high level transients / dynamics.


Polymide Kapton MT 2 mil thick Film insulator
(Dupont 200MT). - Dirt cheap on e-bay


Item number: 180028543577
5.5"W x 72"L (that's six feet long !)
Buy it now price is : US $8.99
US Postal Service First Class Mail is : US $2.25
Shows Qty = 12 in stock.

For you bulk buyers, the same vendor has:
Item number: 180028544664
5.5"W x 144"L (that's 12 feet long)
Buy it now price is : US $16.49
US Postal Service First Class Mail is : US $3.00
Shows Qty = 6 in stock.

Click the image to open in full size.

P.S. I'm not affiliated with this vendor, just thought I'd pass
the info to you'se guys.
__________________
Writing is good exercize for the texticles!
  Reply With Quote
Old 21st January 2007, 12:44 PM   #12
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
1thou=1mil=0.001inch=0.025mm thick Kapton would be even better.
Does anyone know where to get that cheap?

3M selotape is a form of Kapton but not formulated for high temperatures. How well would that work? I think the adhesive is actually thicker than the tape!
__________________
regards Andrew T.
  Reply With Quote
Old 21st January 2007, 01:38 PM   #13
diyAudio Member
 
BrianDonegan's Avatar
 
Join Date: Dec 2004
Location: TPA HQ
My general preference is Bergquist K-10 (Kapton-based) thermal pad. (http://catalog.digikey.com/scripts/p...name=BER118-ND). Have used it in many applications and never had a problem.

It is thicker, but especially for kits, where skill-levels vary widely, they are pretty foolproof. More experienced builders can do what they want.
__________________
Twisted Pear Audio
  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
Phantom power supply argument Original Burnedfingers Everything Else 3 24th November 2007 02:51 AM
An old argument: TM vs. MTM sqlkev Multi-Way 15 28th August 2006 05:50 PM
support needed to prove argument w/ amp gain settings slicey Car Audio 3 21st August 2005 07:54 PM
Simple answer required for a simple question... rabbitz Multi-Way 4 31st August 2003 10:05 AM
Just another Monty Python argument.... mikek The Lounge 119 4th July 2003 12:38 AM


New To Site? Need Help?

All times are GMT. The time now is 07:50 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