Re: white paste


"Lostgallifreyan" <no-one@xxxxxxxxxxx> wrote in message
news:Xns97AEE87AE43FElostgallifreyangmail@xxxxxxxxxxxxxxxx
"I.F." <dai.ode@xxxxxxxxxxxx> wrote in
news:hvS2g.3080$m4.2273@xxxxxxxxxxxxxxxxxxxx:


I never suggested using excessive amounts - I was rebutting someone
who was suggesting scraping it so thin it has no chance of filling any
voids, and from their comments on the efficiency (or lack of) of the
compound - they even had me wondering if cooking oil would work
better!

Some of the cheaper manufacturers still use plain silicon grease which
is a lot less efficient than the white paste - but still orders of
magnitude better than air.



You'd said this:

[quote]
The only problems with putting too much on are the cost of the paste and
what squeezes out when you re tighten the heatsink is messy!
[/quote]

That could be just as dangerous with a large surface. I agree with you for
small ones though, I do it just as you say for those. But guitar amps
built
as the first poster describes are definitely an exception. Better to go
with the advice as for fitting Peltiers if you want to get those right.

It's also rather subjective, I have a few old stock tubes of paste that have
dried out so the paste is a bit stiff, if this was put under a large plate
heatsink the heatsink would visibly bend as the screws were done up - I can
get away with using this on smaller items like TO220 cases so long as I
spread it evenly. More recently purchased tubes of the product I have found
rather runny, in fact it is so runny it could be painted on with a brush - I
could chuck the whole tube on a large heatsink and the excess would squeeze
out with the screws not much more than finger tight!


.