jim beam wrote:

On 03/28/2013 06:51 PM, Michael A. Terrell wrote:


jim beam wrote:


that's bogus. unless there's been a MAJOR screw-up, potting compounds
are carefully matched to the thermal and chemical application - they
serve to increase reliability, not degrade it.



How many deigns have you selected the proper potting compounds for?
What types of filler materials? How did you verify that no moisture
would be trapped inside the potting? Did you verify the temperature
coefficient of very component, the PC board material and the housing?
Test it for extended periods over the entire temperature, humidity and
barometric conditions that it can encounter in service. how about
vibration & impact testing? Or are you just blowing more smoke out your
ass.


wtf is eating your ass tonight? you're right that all those factors are
relevant. that's why i said potting compounds are "carefully matched".

as to moisture, you're attacking a straw man. i specifically didn't
list every possible application detail because it's common knowledge to
anyone doing that work. nobody specifies that any more than mechanical
drawings specify conventional right-hand threading on fasteners. /all/
fasteners are right hand threaded UNLESS left hand is specifically
detailed.



Let me offer you some good advice, put him on your black list so it
won't eat you up. I only see him in replies now, like yours here because
I have block him out of my reader.

He's nothing but an old bickering dried up prone. In his younger
years he most likely good off on little kids learning the field and made
him
feel like he was something else when he offered any knowledge that he
thought was useful to them. These days, the little kids have grown
up and most likely found out that half the information he fed them was
bogus!

Don't worry about what he has to say, he's one of those that wants
every one like you, to kiss is feet and say how much of a god he is.

It should be obviously that will never happen from this end

Jamie