What is the goo? Adcom question.

digital desire · 27th November 2006, 03:43 PM

What is the goo that adcom used to secure the thermister to the driver transistor on 555's?
It comes apart easy, but the only heat sink compund I have seen is the typical white silicone type that does not have the viscosity that the grey stuff has.
Thanks!

Minion · 28th November 2006, 11:22 PM

The grey stuff could be a Silver or aluminum Paste...I use a Silver based heatsink compound on CPU Heatsinks and it is supposed to have the Best heat transfer of all Heatsink compounds....

The stuff I use is called "Arctic Silver" and it is a bit pricey but it does work very well.....

Cheers

anatech · 30th November 2006, 02:08 AM

Hi digital desire,
It was a thermal paste that got sort of harder. Similar to thermal epoxy but not as permanent. Anything that will hold the thermistor down and not short will be okay. You really don't want it to melt or soften with heat either. You could also use Wakefield Deltabond 155 (epoxy). It's wonderful stuff, worth it's weight in gold in a pinch.

If you need Arctic silver or the like, it's time to rethink your thermal problems!

-Chris

EchoWars · 30th November 2006, 06:02 AM

JB Weld works good too...even conducts heat nicely.

anatech · 30th November 2006, 03:07 PM

Hi Glenn,
Sounds interesting. Do you have a link for that stuff? I'm always looking for alternatives to things. One never knows.

Thanks,
-Chris

EchoWars · 30th November 2006, 03:29 PM

http://jbweld.net/products/jbweld.php

Hardens as a very tough plastic, has high solids content, and conducts heat nicely. Think of as epoxy on steroids.

anatech · 30th November 2006, 03:45 PM

Hi Glenn,
That I'm going to try and find. Wakefield Deltabond 155 runs about $60 CDN, so if this works it may save me some money.

-Chris

EchoWars · 30th November 2006, 05:06 PM

Common item in the hardware stores in the States. Not sure for you third-world guys...

anatech · 1st December 2006, 01:58 AM

Hi Glenn,
It's no good up here. We need stuff that is useful in sub-zero conditions.

-Chris

digital desire · 1st December 2006, 03:07 AM

I conisdered JB weld, but worry that if I need to take it apart again I would not be able.
I suppose I could just tuck in tight, and use the regular white heat tranfer sauce, but I was looking for the paste stuff.

Thanks anyway, I have yet another 555 now to fix, suppose I am starting a collection!

27th November 2006, 03:43 PM	#1
digital desire diyAudio Member Join Date: Nov 2006	What is the goo? Adcom question. What is the goo that adcom used to secure the thermister to the driver transistor on 555's? It comes apart easy, but the only heat sink compund I have seen is the typical white silicone type that does not have the viscosity that the grey stuff has. Thanks!

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28th November 2006, 11:22 PM	#2
Minion diyAudio Member Join Date: May 2006	The grey stuff could be a Silver or aluminum Paste...I use a Silver based heatsink compound on CPU Heatsinks and it is supposed to have the Best heat transfer of all Heatsink compounds.... The stuff I use is called "Arctic Silver" and it is a bit pricey but it does work very well..... Cheers

30th November 2006, 02:08 AM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi digital desire, It was a thermal paste that got sort of harder. Similar to thermal epoxy but not as permanent. Anything that will hold the thermistor down and not short will be okay. You really don't want it to melt or soften with heat either. You could also use Wakefield Deltabond 155 (epoxy). It's wonderful stuff, worth it's weight in gold in a pinch. If you need Arctic silver or the like, it's time to rethink your thermal problems! -Chris

30th November 2006, 06:02 AM	#4
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	JB Weld works good too...even conducts heat nicely.

30th November 2006, 03:07 PM	#5
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Glenn, Sounds interesting. Do you have a link for that stuff? I'm always looking for alternatives to things. One never knows. Thanks, -Chris

30th November 2006, 03:29 PM	#6
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	http://jbweld.net/products/jbweld.php Hardens as a very tough plastic, has high solids content, and conducts heat nicely. Think of as epoxy on steroids.

30th November 2006, 03:45 PM	#7
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Glenn, That I'm going to try and find. Wakefield Deltabond 155 runs about $60 CDN, so if this works it may save me some money. -Chris

30th November 2006, 05:06 PM	#8
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	Common item in the hardware stores in the States. Not sure for you third-world guys...

1st December 2006, 01:58 AM	#9
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Glenn, It's no good up here. We need stuff that is useful in sub-zero conditions. -Chris

1st December 2006, 03:07 AM	#10
digital desire diyAudio Member Join Date: Nov 2006	I conisdered JB weld, but worry that if I need to take it apart again I would not be able. I suppose I could just tuck in tight, and use the regular white heat tranfer sauce, but I was looking for the paste stuff. Thanks anyway, I have yet another 555 now to fix, suppose I am starting a collection!