Best heat sink compound?

[Spehro Pefhany]

On Sun, 14 Dec 2003 02:29:36 -0800, the renowned DarkMatter
<DarkMatter@thebarattheendoftheuniverse.org> wrote:

On Sun, 14 Dec 2003 04:52:14 GMT, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> Gave us:

Regular anodizing is pretty easy and the
chemicals are relatively harmless compared to many plating operations.
Caswell sells the supplies in small quantities.

That is not anodizing. That is referred to as "chem-etch", or
"chem-film". Some versions have the appearance of an anodized piece.
Unless externally applied electric currents are involved, it is not
anodizing.

Err..of course the process involves externally applied currents, or it
would not be anodizing.

You prepare the surface and clean the part very well, anodize in an
electrolyte solution (the part to be anodized is, not surprisingly,
the positive side, and something like lead is the negative),
neutralize and rinse, then dye (if desired), and the pores are sealed
with another chemical in boiling water.

Some of the parts done in a home shop look pretty darn good- I
recently handled a telescope that a fellow made accessories for (in
preparation to chasing a solar eclipse into some gawdfersaken bit of
the globe) and it really looked professional. He told me he used an
pro aniline dye, but fabric dyes (eg. Rit) can work too.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[John Fields]

On 14 Dec 2003 00:58:46 GMT, als73@hotmail.com (als) wrote:

Thanks for the URL. I nearly always learn something from
another viewpoint, and I did this time also.
I have done the types I and II (successfully!).
What is the procedure for the type III?
---

I think it's done at a lower temperature (36°F?) for a longer time at a
higher voltage. To find out for sure get a current copy of MIL-A-8625.
If you can't find an alternate source, info on how to do that is at
http://www.dodssp.daps.mil/

--
John Fields

 

[John Woodgate]

I read in sci.electronics.design that DarkMatter <DarkMatter@thebaratthe
endoftheuniverse.org> wrote (in <umtnsvk15sqpqmb8jrsciapsk41apf0eau@4ax.
com&gt about 'Best heat sink compound?', on Mon, 1 Dec 2003:

You are both fucking nuts.

Let's hope they don't get cross-threaded, then.
--
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
Interested in professional sound reinforcement and distribution? Then go to
http://www.isce.org.uk
PLEASE do NOT copy news posts to me by E-MAIL!

 

[John Larkin]

On Sun, 14 Dec 2003 16:18:21 +0000, John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:

I read in sci.electronics.design that DarkMatter <DarkMatter@thebaratthe
endoftheuniverse.org> wrote (in <umtnsvk15sqpqmb8jrsciapsk41apf0eau@4ax.
com&gt about 'Best heat sink compound?', on Mon, 1 Dec 2003:
You are both fucking nuts.

Let's hope they don't get cross-threaded, then.

Screw him.

John