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Old 24th March 2005, 07:40 AM   #1
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Default transistor glue?

Anybody know what the white stuff between the transistor and heatsink from power amplifier? Where can i get those stuff.
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Old 24th March 2005, 07:53 AM   #2
Giaime is offline Giaime  Italy
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Yes it isn't glue, it is thermal compound. It is a silicone grease studied to improve thermal conductivity between the device and the heatsink. Practically it makes better thermal contact between the device and the heatsink. Always use it, but in very small quantities, well distributed under the transistor. You can get it at electronics stores, PC repair shops, and even supermarkets. Look for "Silicone Grease" or "Silicone heat transfer compound". Be aware that it isn't cheap: I payed 6euros for just 30g of it.
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Old 24th March 2005, 02:48 PM   #3
jaycee is offline jaycee  United Kingdom
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it's also known as "Dow Corning" after the company that commonly makes it. You may be able to get it from a computer shop that sells CPU heatsinks.
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Old 24th March 2005, 04:58 PM   #4
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It is silicon grease with extra stuff in it to improve heat conduction. Messy stuff, seems to migrate by itself! Buy it at any good electronic supplier.
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Old 24th March 2005, 06:11 PM   #5
markp is offline markp  United States
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'Heat sink compound' and it can be had at Radio Shack in a pen style applicator that is easy to use.
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Old 25th March 2005, 02:54 AM   #6
anatech is offline anatech  Canada
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Just make sure it's fresh. Buying at a proper parts jobber is better that Radio Shack if you can. Replace the mica insultors while you are at it.

-Chris
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Old 25th March 2005, 03:32 AM   #7
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Everything Chris said. Plus, make sure your hands and the insulators are clean and free of any metal or grit.
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Old 25th March 2005, 12:17 PM   #8
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...and wash well afterwards. It gets everywhere and is not very good for you.
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Old 25th March 2005, 01:05 PM   #9
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Quote:
Originally posted by jaycee
it's also known as "Dow Corning" after the company that commonly makes it.

never heard of it refered to as that.... hmm....

you can also get silver stuff, which has better heat transfer properties. but I guess its upto you.
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Old 25th March 2005, 01:13 PM   #10
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"Artic Silver" (IIRC) is the name of the silver kind my friend uses on the CPU's in his PC's..
It's supposed to be "the best" heatsink-goop(technical term ) around.
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