E
Ed Huntress
Gerald Miller said:Check the front of the refrigerator.
Gerry }
London, Canada
Then, thank God for magnetism, too. d
Gerald Miller said:Check the front of the refrigerator.
Gerry }
London, Canada
john wrote:
Interesting. What package types were susceptible to this (or did it
matter)? Metal can TO-x ICs seemed to be the most reliable (RTL, HLL,
some DTL, etc.) but I found a lot of early ceramic packages suffered
from bad seals and permitted fungi to enter and grow inside (this
in equipment that had never been wet, just from operating
environmental conditions). These parts seemed also to lack proper
passivation internally.
The ceramic Ic's were supposed to be more reliable but in fact as you
said they had a higher failure rate. The sealant that they used was not
too good since in many instances the tops would come off the IC . I bet
the sealant was probably a little corrosive too.
The first generation of IC's had a very high failure rate in compared
to todays products.
They were very heat sensitive and would act up
above 100 degrees F even though the rating was higher. If I found one
bad ic I would just change out every IC on the whole board that had the
same date code and install a second generation ic with the same number.
On some equipment you would automaticly change out a couple of parts
and it was fixed. One company insisted on using the cheapest parts
available but their advertising sold a lot of equipment in spite of the
poor reliablity of the product. Today ic's and transistors , other than
high power transistors, almost never fail unless something external
blows them out. The industry has come a long way since the fifties when
I first started in electronics.
According to krw said:snyder.on.ca says...
Shouldn't be too bad today. Twenty years ago, when people smoked in
office buildings... Even so, hardware is cheap. Labor isn't.
krw said:"It" being the cat, I assume you mean. ...makes too much noise. ;-)
ChairmanOfTheBored said:Either heal straps on an ESD matting
or floor set-up, or wrist or smock strap versions.
I do it all the time, never had an issue with it. One thing I have learned
though is to stay away from optical drives with the air, more than once
I've stirred up dust which settled in and ruined the optics.
I suppose you've never heard of a special nozzle made for
electronics. It has a radioactive isotope to prevent static problems.
Microdyne leased two of them for the production floor, because the
manufacturer didn't sell them.
Central Florida isn't a desert, but I suppose you've never seen a
commercial air compressor with a dryer?
Rich said:Of course it needs to be dried; every day we have to empty the
water out of the bottom of our compressor tank, probably because
the vapor gets compressed right along with the air, and condenses
out.
But I'd think it would take some heroics to actually _dessicate_ the
air; and I'd think that in FL there'd be enough ambient humidity
to drain off any static.
For real people that is a heel strap. You, on the other hand...
I put a finger or thumb on the hub of the fan blades - it kind of scares
me when they spin up to 1000's of RPM; some motors become generators when
spun.
ChairmanOfTheBored said:Spelling lames? Hahahah... You're a joke, boy.
Try to stay on topic... wait.. you would have to actually know what
is going on to do that...
Not when they plug into the wall, and have no permanent magnets in them
or no energized field coils.
Then, thank God for magnetism, too. d
According to krw said:snyder.on.ca says...
[ ... ]
Shouldn't be too bad today. Twenty years ago, when people smoked in
office buildings... Even so, hardware is cheap. Labor isn't.
Including the labor of re-entering or re-creating lost data. Of
course, proper backup procedures can minimize this.
Then the fan isn't big enough! ;-)
If the data is already lost, the repair tech isn't going to bring it
back without a lot of heroics and luck. The bottom line is: don't
lose data. It doesn't come back.
krw said:Perhaps (noise(cat) + noise(fan)) is constant? ...like "all bicycles
weigh 25lbs., if you include the lock".
Last time I saw a cat go through a fan, it went in white and came outI was thinking that if the fan was big enough the cat wouldn't go
near it, or would be blown out the exaust port, if it did. ;-)