Diecast boxes heat dissipation

[JW]

Yes. And your mother should be jailed as a felon BLAH BLAH BLAH...

[...] Repeat season already?

You need to get someone to write some fresh material for you, seeing as
how you're not capable.

 

[Jamie]

Ah! He's over-clocked. That explains all the errors.

And he's also an excrementologist.



Jamie

 

[TheGlimmerMan]

Yes. And your mother should be jailed as a felon BLAH BLAH BLAH...

[...] Repeat season already?

You need to get someone to write some fresh material for you, seeing as
how you're not capable.

It wasn't "material" it was a factual reference to your retarded
mother, and fecal father. FOAD, shithead.

 

[John - KD5YI]

WOW! You hit a five-bagger and kept the poor kid up beyond midnight.

Nah. He works the second shift like most janitors.

 

[TheGlimmerMan]

WOW! You hit a five-bagger and kept the poor kid up beyond midnight.

Kid? You're an idiot.

When did I ever say that I ever lost any sleep over you retarded fucks?

I do not sleep, idiot. I get more done in a single day than a dumbfuck
like you gets done in an entire week.

I have done more to make the world a better place in the last month
than you will in your entire pathetic life. That includes putting a
retarded **** like you in his place.

 

[Jamie]

Nah. He works the second shift like most janitors.

Hey don't laugh, a while ago our company hired a process engineer from
India.

Our business is in making electronic wire and cables of various
varieties. His job is to reengineer the process to improve through put
with less cost, like most other places do.

We just found out that he was educated and earned a degree (the only
one he has) as a Sanitation Engineer.

Mybe we should nick name him A "Excrementologist"

Jamie

 

[TheGlimmerMan]

And he's also an excrementologist.



Jamie

So, that means that every time I ever declared you as a piece of shit, I
was right on the fucking mark.

 

[TheGlimmerMan]

Hey don't laugh, a while ago our company hired a process engineer from
India.

Our business is in making electronic wire and cables of various
varieties. His job is to reengineer the process to improve through put
with less cost, like most other places do.

We just found out that he was educated and earned a degree (the only
one he has) as a Sanitation Engineer.

Mybe we should nick name him A "Excrementologist"

Jamie

You are the one that appears obsessed with it. You and John.

Far more than someone that simply uses the term in conversation ever
could be.

Bwuahahahahahahahahaha! The shitheads are EXPOSED!

 

[John - KD5YI]

NO! POLISHED metals run LOWER than the rough or abraded surfaces do.
Your brain is running low.

Read slowly for comprehension "Roughened metals mostly run fairly low."

He did not say roughened metals run lower than polished metals.

But, I know you will have another tirade and accuse somebody for your
failure to pay attention.

Do you have medication for your condition?

 

[TheGlimmerMan]

Read slowly for comprehension "Roughened metals mostly run fairly low."

His remark was as stupid as your grasp of it.

"polish" is a very WIDE gamut of surface treatments, you stupid ass.

It ranges from the finish one gets from a 36 grit grind, to what the
metal shop boys do at about 80 grit, called timesaving, to the #6 finish
you would see at "White Castle" and other stainless assemblies for the
food processing industry, to a #8 "mirror polish" that really isn't
because it still carries the abrasive polish grain in it, to a perfect
mirror finish, requiring a hand rubbed completion taking hours per square
foot of surface.

So maybe the retarded **** should have made his stupid blanket dumb
statement a bit more carefully, because both he and you are wrong.

Not that you would even fucking know the first thing about it, since
all you have done is mouth off like the petty little bitch-boy that you
are.

He did not say roughened metals run lower than polished metals.

He, nor you know the difference. I do.

But, I know you will have another tirade and accuse somebody for your
failure to pay attention.

Tirade? No, idiot. Me calling you the stupid **** that you are is not
a tirade. It is a statement of fact. Come back and make a proper,
technical argument, and you might gain a bit of credence. Come back like
the mouthy little bitch-boy you have been since you arrived a couple
years back, and you will be treated as such, bitch-boy.

Do you have medication for your condition?

No, you are not allowed to have anything I have. No, you are not
allowed to know what, if anything, I have.

Brainless fucktards like you deserve nothing. That is all I should
give you too. I couldn't help putting you in your place one more time
though. You and the polished or "rough or abraded" dumbfuck.

 

[BarnCat]

You could

You could go find a nice Oxyuranus Microlepidotus to play with.

Perhap I should come down there and introduce you to one while you are
taking a nice nap. They are very friendly, and they just love retards.
You would get along famously for at least a few minutes.

 

[JW]

And he's also an excrementologist.

Well, they say you should stick with what you know best.

 

[JW]

A pity that your fathers was defective.

Yes. And your mother should be jailed as a felon BLAH BLAH BLAH...

[...] Repeat season already?

You need to get someone to write some fresh material for you, seeing as
how you're not capable.

It wasn't "material"

Well, not fresh material, anyway. Flip the record already, you Dildo.

 

[JW]

"Fast and full of errors"

Yep. I now dub thee OnceRight.

 

[Sylvia Else]

http://groups.google.com/group/sci.electronics.design/msg/65c048ca972...

On Jan 2, 12:58 pm, [email protected] (Don Klipstein) wrote:
[...]
For that matter, heatsinks without fins or forced air cooling tend to get
rid of heat better if they are painted or covered by a layer of masking
tape - despite the thermal resistance of such a coating.
[...]
- Don Klipstein ([email protected])

Bare aluminum covered with MASKING TAPE
dissipates heat better than bare aluminum??

This assertion certainly is counter intuitive.

Is it documented anywhare?

If true, I'd like to understand the mechanism of how it does so.

It would depend on the temperature. If the heatsink is fairly hot, the
tape will increase thermal emissivity (deep IR radiation) a lot. That
may make up for the small addition of thermal resistance caused by the
tape itself.

From the surface of the heat sink, there's air, and still air has a
lot of thermal resistance. A layer of masking tape would be in series
with the air, and wouldn't increase net thermal resistance much. So
the radiation advantage can win.

There must be a reasonably easy way to test this.

John- Hide quoted text -

- Show quoted text -

"There must be a reasonably easy way to test this."

I was trying to measure heat flow from a through hole resistor... how
much goes down the leads vs into the air. The problem is that once
you get a few degrees of temperature difference you start to get
convection of the air... And that seems to dominate the heat flow.
It's hard to disentangle all the heat flow paths.

George H.

Back to my 100 Watt light bulb argument.

Perfect proof. Flash the nichrome for twenty seconds inside the box.
Measure the box air temp. Flash the light bulb for twenty seconds inside
the box. Measure the box air temp.

Measure the box air temperature where? There's no reason to think that
the air inside the box is in thermal equilibrium. Not only will the
temperature vary from place to place, but some of the energy put into
the box will be in the form of kinetic energy of the air as it convects
around the box.

Sylvia.

 

[TheGlimmerMan]

Well, they say you should stick with what you know best.

Which is why the entire group is still waiting for you to actually make
a valid, technical argument.

Thus far, all you have demonstrated is the fact that you have no
capacity to make a valid, technical argument.

You mouth off like a pissy little bitch-boy pretty good though.

 

[JW]

You mouth off like a pissy little bitch-boy pretty good though.

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[John - KD5YI]

On 1/7/2011 2:57 AM, TheGlimmerMan wrote:

(snip tirade)

No, you are not allowed to have anything I have.

<Yawn!>

 

[[email protected]]

Out of interest, what's the record?

The best I've managed is a seven. Others claim nine.

 

[Don Klipstein]

His remark was as stupid as your grasp of it.

"polish" is a very WIDE gamut of surface treatments, you stupid ass.

It ranges from the finish one gets from a 36 grit grind, to what the
metal shop boys do at about 80 grit, called timesaving, to the #6 finish
you would see at "White Castle" and other stainless assemblies for the
food processing industry, to a #8 "mirror polish" that really isn't
because it still carries the abrasive polish grain in it, to a perfect
mirror finish, requiring a hand rubbed completion taking hours per square
foot of surface.

Although these differ from each other, for metals that have much usage
in heatsinks all of these options achieve much less emissivity than a
paint job does.

He, nor you know the difference. I do.

I did agree that roughened metals run higher than polished metals - but
still low in comparison to giving them a paint job. This is especially
true for the usual metals that heatsinks tend to be made of.
<SNIP mostly bluster>