magnetic field

Sat Aug 15, 2009 2:34 am   

On Fri, 14 Aug 2009 19:24:46 GMT, Rich Grise <richgrise_at_example.net>
wrote:


Pure optics. Take the field of view. Say you are looking at a 6 inch
spot.

That spot is focused down to what is typically a 2 mm resistor
bolometer sense element. It usually sits a couple mm down in the
"transistor can" under a germanium window or other such IR window media.

That 2mm spot has the entire "image" cast upon it. It is exactly like
when you put a pinhole in a box and look at the sun on the back wall of
the box. That image of the sun is a perfect casting of the actual image.

Same with IR. Instead of a CCD of whatever size like with video, the
resistor bolometer is only 2 mm square.

Just do not point your IR meter toward the sun. It will fry the sense
element.

Sat Aug 15, 2009 2:37 am   

On Fri, 14 Aug 2009 19:45:02 GMT, jimp_at_specsol.spam.sux.com wrote:


Actually, the best instruments go straight from the primary mirror to
the sense element.

IR video has a lens system, and cheap IR has a fresnel <sp>, but most
radiate directly onto the sensor.

Most are set up like a reflector telescope.

Lens systems cut energy, raising the noise floor.

Sat Aug 15, 2009 2:42 am   

On Fri, 14 Aug 2009 15:09:51 -0700, Gone Fishin' <gone_at_fishin.net> wrote:



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Wed Jan 20, 2010 9:44 pm   

You might consider picking up a router. You'll
connect the single modem you have to the router,
then the router will connect both the computer and
internet radio. But, take a look at the ip address
that your computer thinks it has, (Start -> Run ->
type in CMD click ok.. in the black box type IPCONFIG.
If your IP ADDRESS is a 192.168.x.x or 10.x.x.x then
you are already behind a router that may be built into the
modem.... in that case you'll just need a 10/100 hub
to connect both the computer and radio to the internet.
This is basic home networking.

Most modems will require a power down and power up
in order to talk to a router.



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Thu Jan 21, 2010 1:59 am   

Thaaank you SomebodyHere :--)

nobodyhere_at_thisplace.com wrote:

Yes, I have the 192.168.......


I prefer wired to wireless in routers. Could a
second DSL modem be used?
If not then, a wired router would be my choice. I
already use a firewall,
so would another one be needed?


I could probably handle that. You'll probably hear
a lot of screaming
if it doesn't work for me. ;-)

Thanks for your help.

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