Electronics > Projects, Designs, and Technical Stuff
really proper way to apply thermal compound?
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Mr. Scram:

--- Quote from: coppercone2 on December 13, 2018, 08:43:31 pm ---I don't know why you don't understand the context but to explain it in clear detail:

1) There is some crap about using too much thermal grease being bad other then non economic
2) there is a claim insufficient mounting pressure is a result
3) there is a claim this is non sense because it should work and mechanically cannot be explained
4) a partial explanation is offered by the mounting geometry of certain packages being susceptible to contamination if excessive thermal grease is used
5) there is a detailed explanation about the functioning of bolts and screws for those that did not read very boring literature about proper screw function (going off about)

yea im 'going off' maybe try to follow the discussion?

I noticed that people who are not mechanical engineers, and most engineers in general that I spoke to, don't really appreciate the mis behavior of threads from contamination. Plenty of people think "yea its real tight that means its good".

but idk do you say that to your wife when she complains you left your socks on the floor? 'shes going off' ............ ::)

--- End quote ---
Maybe people have trouble following your reasoning because of the badly formatted and written posts, with subjects that may or may not have to do with what's discussed? Please take some care when writing a post, instead of giving people an attitude.
coppercone2:
your giving the attitude bitching about having to read
wraper:

--- Quote from: james_s on December 13, 2018, 10:31:24 pm ---A thick glob does not always squeeze all the way out, it has some thickness. After removing the transistors I have often seen a thick layer of the stuff, as thick as a piece of paper easily. Not a huge gap but not zero either. Biggest problem though was it made a greasy mess. There is no reason to glop on a ton of it, a little goes a long way.

--- End quote ---
Thick blob squeezes out just as well as a thin blob, with barely any resistance until only a thin layer is left. TO-3 package not sitting flat most likely means that heatsink/package was not completely flat and/or one screw was tightened at full force and then opposite screw tightened when package was already lifted on one side. Nothing to do with thermal paste. Actually a small amount of thermal paste would mean there would be air in that gap, thus thermal transfer being even worse.
glue_ru:
wow, you need a life
james_s:

--- Quote from: wraper on December 14, 2018, 12:03:30 am ---Thick blob squeezes out just as well as a thin blob, with barely any resistance until only a thin layer is left. TO-3 package not sitting flat most likely means that heatsink/package was not completely flat and/or one screw was tightened at full force and then opposite screw tightened when package was already lifted on one side. Nothing to do with thermal paste. Actually a small amount of thermal paste would mean there would be air in that gap, thus thermal transfer being even worse.

--- End quote ---

Look you can speculate all you want, I'm only reporting on what I've found. I've repaired probably 50 of these monitors and most had been worked on multiple times over the years. I found a lot of transistors with thick layers of thermal paste on them that had not squeezed out, this is just plain fact that I saw with my own eyes and scraped off with my own hands. Maybe the paste they used was thicker than the modern stuff, I don't know, the monitors were 20-30 years old when I dealt with them.

It's always funny whenever someone tries to tell me something isn't possible when I'm the one that has seen it, do you think I'm lying?
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