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Magnetic disturbance

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Robert Macy

Jan 1, 1970
0
  hell no, we do cross linking of insulating materials. Other people
use the same type of equipment to irradiate food, tires etc...

   I don't know how much energy is involved with wafer fabrication but
we can go up in the range of 2.5 Mev on a couple of the machines with
a large scanning area. One of those machines are fed with paired 750MCM
feeds from the buss, that is each phase has a pair of 750MCM, the other
machines use paired 500MCM

   We met up with some one about 5 years ago now, that has a unit that
requires a dedicated feed from the electric company, lots of power
there. They irradiate anything for any one accept petroleum, that is
done with a proton accelerator.

  We do custom electronics for other operations in the business too,
everything we do stays in the circle of the company. We do not
design anything for commercial applications out side of what we do there
  or what ever one of our other locations may need.

   Out side of that, I do get into designing electronics that is not
related to my job.  The last big adventure I got into was redoing an
eddy current heat treating process inverter system, that was fun. snack
toy money.

Jamie

Uh, Jeff, that's nanoTeslas, not newtons
 
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Robert Macy

Jan 1, 1970
0
I don't do that with the loops but the fluxgate detectors was considered
however, research indicated that they may not have been that good at
detecting pedestrians and we ended up with what we have.

  We can't put anything sensitive inside the vault, it'll get destroyed
with in mins, maybe seconds with electrons bouncing off the walls like
they do. As it is, we have problems now with an acid that builds up on
everything due to the ozone generation and moisture mixed.

  Jamie

Isn't it true that if you generate carbon monoxide that its presence
will so actively combine with the ozone that you can minimize the
problem? And, excessive CO is not that caustic. Plus, keep out
pedestrians.
 
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Jamie

Jan 1, 1970
0
Jan said:
I was thinking last night that teh little flux gate compass I build
did detect me with a celphone walking around in the room.
The magnet is in the speaker and also the little vibration buzzer of thw phone.
I have an other 3D fluxgate compass module from ebay,
wrote C code for that, works OK, but you have to calibrate that stuff.
there are also magnetometers that need no calibration.
To detect peoplw with cellphones or othwr magnetic stuff you could put one next to the
doors, and connect it to a level detector and trapdoor lock to prevent them from entering.
Alligator are optional.
I know I do not like to turn in my cellphone, and I can imagine many people not
reporting magnetic items like that.
Not sure if the idea works, or that is the cause of course.
I don't do that with the loops but the fluxgate detectors was considered
however, research indicated that they may not have been that good at
detecting pedestrians and we ended up with what we have.

We can't put anything sensitive inside the vault, it'll get destroyed
with in mins, maybe seconds with electrons bouncing off the walls like
they do. As it is, we have problems now with an acid that builds up on
everything due to the ozone generation and moisture mixed.

Jamie
 
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Joerg

Jan 1, 1970
0
Jeff said:
I had the problem while trying to trim hybrid resistors with a sand
blaster and later a laser. Besides the earthquake simulating
vibration from the passing trains, there was the slight tilt in the
concrete slab foundation when the train was parked near the building.
The weight of the train would cause the foundation to tilt, ruining
the laser alignment. I found the problem by setting up an optical
(non-laser) tilt measuring contraption using a distant mountain top
reference point. Actually, that was a marginal idea because I found
myself measuring tides and freeway traffic. When the number of cars
on a nearby freeway increased during rush hour, the ground would sink
sufficiently to deflect the inclinometer. However, it did demonstrate
that train induced foundation tilt was the primary culprit.
Speculation was that the building was floating on the water table, but
that was never proven. Until the system was rebuilt to be less
sensitive to building movement, we posted the train schedule on the
wall, and production arranged to have breaks when the trains were
scheduled to pass.

Interesting. We did the same thing, but with these:

https://de.wikipedia.org/w/index.ph...AN_SL_172_HO.jpg&filetimestamp=20070923163037

In order to perform accurate ultrasound beam profile tests we had to
wait until each bus was at least 1/4 miles down Beethoven Street. I was
amazed how heavy and "ground-moving" electric buses can be. This was in
Germany where most passengers on these buses are not members of the
0.1-ton class.

[...]
 
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Joerg

Jan 1, 1970
0
J

Jamie

Jan 1, 1970
0
Robert said:
Isn't it true that if you generate carbon monoxide that its presence
will so actively combine with the ozone that you can minimize the
problem? And, excessive CO is not that caustic. Plus, keep out
pedestrians.
I know a couple of employee's I have in mind, I wouldn't mind using as
test subjects.! ;)

Jamie
 
J

Jamie

Jan 1, 1970
0
Jeff said:
I had the problem while trying to trim hybrid resistors with a sand
blaster and later a laser. Besides the earthquake simulating
vibration from the passing trains, there was the slight tilt in the
concrete slab foundation when the train was parked near the building.
The weight of the train would cause the foundation to tilt, ruining
the laser alignment. I found the problem by setting up an optical
(non-laser) tilt measuring contraption using a distant mountain top
reference point. Actually, that was a marginal idea because I found
myself measuring tides and freeway traffic. When the number of cars
on a nearby freeway increased during rush hour, the ground would sink
sufficiently to deflect the inclinometer. However, it did demonstrate
that train induced foundation tilt was the primary culprit.
Speculation was that the building was floating on the water table, but
that was never proven. Until the system was rebuilt to be less
sensitive to building movement, we posted the train schedule on the
wall, and production arranged to have breaks when the trains were
scheduled to pass.

My sense of smell tells me that the problem has something to do with
the utility power, but exactly what and how, I can't deduce. Are you
doing any monitoring of the DC component of the utility power? Perhaps
even order harmonic distortion, which would show up as a change in
waveform symmetry?
No I have not done that but like I said, the feeds come in a long ways
from that location plus we have our own transformers. If memory serves
we have 12kv lines coming in to our transformer stations. We have 2 out
side and 5 transformer vaults in the basement of the main building. But
like I said, they are far way, if there was that sort of issue I think
we'd see problems in other equipment.

I'll tell you what happen one day though, non related to this thread
here, was a general inspection was being done of the 12kV feeds coming
in out side from the electric company, something that is done by one of
the E1's there. He was out side looking up at a commercial feed coming
in and noticed a connecting link to our building was dangling? how could
this be? That would mean we're single phasing however, the plant was
fully loaded as normal.

It was strange, we started to doubt how our place was wired, because
we have another feed coming in. After remembering conversation a I over
heard about the third shift electrician making a comment about one area
having a voltage issue and he couldn't figure out, it all clicked in and
we all seem to agree with that. What was happening was, with all the
induction motors we have operating, they were generating the third leg
for us..

Jamie
 
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Jasen Betts

Jan 1, 1970
0
Just thought of something, our satellite reception went wonky the
other night/day? during 'good' weather. The satellite company claims
moisture in the air during a rainstorm reduces the uWave signal and
you get signal breaking up. We got signal breaking up but the weather
here was SUNNY and clear! Anybody else experience that? Maybe we can
correlate the disturbances we saw to what happened to Jamie.

perhaps a "sun outage"? It typically happens twice a year on dates
equidistant from the solstice. Your dish was doing a little microwave
astronomy on the nearest star.
 
R

Robert Macy

Jan 1, 1970
0
...snip...
perhaps a "sun outage"? It typically happens twice a year on dates
equidistant from the solstice. Your dish was doing a little microwave
astronomy on the nearest star.

Never thought of that at all!

I've got an abandoned dish complete with LNA all provided by Direct TV
I could experiment with too. [I asked them to come take it away, but
they said they don't do that.]
 
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