I haven't been following this, so I'm not sure how it got to "burning shorts",
but I used to do the same thing with portable cell phone boards. Occasionally,
we'd find an internal short in the 4 or 6 layer boards that would clamp a 12A
power supply, so I kept a gel-cell battery on my bench. Sometimes the short
would burn and the board would be just fine, other times the traces would burn.
I think I ran about a 50% rate on fixes vs. smoked boards...
Joe,
N3JI
craxd <craxd1@ezwv.com> wrote:
Heck, we had too, our boss, who was the electrical superintendent, made
us. They made covered hopper RR cars there and primarily that was done
around the shot blast. That was a huge wheel blast where they pulled a
complete RR car through. That steel dust would get in everything. When
the paint shed went down (where the blast was) that was an emergency to
them. Loosing like $75,000.00 an hour while it wasn't running. Then, the
steel shop was sending out fresh welded cars and was ganging up behind
the blast. On top of that ADM, Dow, or other buyers were expecting so
many cars out of there a day! Then, a CSX engine was waiting to pick up
a load of six a shift. So help me, we would go to a 200 amp main, change
the fuses out with some copper bus bars they had made, hide around the
side of the main, and throw the switch. You'd have somebody else
watching, and sure enough, after the "BANG", a smoke cloud appeared.
Then we just yanked out whatever was bad and replaced it using about 3-4
electricians working hard as we could. On an average, I fixed about 4
to5, 600 amp welding machines a day, along with maybe a hoist or two, or
an overhead crane would go down. If a crane went down, you got to walk
the rail out to the stranded operator =) This was an I beam about 12-16"
wide and about 30' in the air. It was easier to do this than pack a 40'
extension ladder and put it up yourself. Ohhhhhhh the good old days, LOL!
Will Matney
jsb@digistar.com wrote:
>On Mon, 13 Sep 2004, Will Matney wrote:
>
>
>
>>The assembly lines there couldn't hardly be shut down, so an
>>intermittent problem was found by brute electrical force. We'd jump the
>>fuse out with a copper rod, turn on the main power, and look for the
>>smoke! It surely would find the problem fast. However, there was some
>>new wire to be pulled afterwards too! LOL! I had to tell that one, just
>>had too.....
>>
>>
>
>I love it - I used to work for a company in Carthage, MO that built CRTs
>for various companies (Apple, Sun, Military, etc.) and we never had a
>moment to stop the line for anything - I wholly understand about not being
>able to shut the lines down. I was lucky enough to start off doing glass
>matching on monochrome monitors and tweaking the deflection boards (so I
>had about a half hour between units) but I know what you're talkin' about
>- OH LORD I wish I could have seen those moments where the fire was put to
>the wire to find the short - bwahahahha that is priceless!!
>
>
>vy 73 Jason N1SU
>
>
>__________ NOD32 1.817 (20040719) Information __________
>
>This message was checked by NOD32 antivirus system.
>http://www.nod32.com
>
>
>
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
---------------------------------
Do you Yahoo!?
Yahoo! Mail - 50x more storage than other providers!
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|