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JC,

My comments/questions interspersed with your message:

jcpearce wrote:
Thank you everyone for the input, now I am looking for some
prioritization. I received the new power supply from www.mini-box.com
and it is substantially better than the previous version
(http://www.mini-box.com/s.nl/sc.8/ca...it.A/id.356/.f ) however
I still get some noise in the radios. The new version is too big to
fit in the previous enclosure so it is sitting slightly apart from the
MB on its own.

I have started to jot down what the system wants to do, pictures and
status at
http://69.229.202.54:8080 Under the 'Image' folder one can see the
plane, the EPIA in the nose and the prototype ADC board.

So now I have a case that has to heavily part for the ATX power lines
to come into it & a non cased DC power supply. I have attached ferrite
beads to the power lines coming in/out with little improvement.
Stupid question here JC, but it looks like you are using a PC style
switching power supply [high noise] to power your standard ATX style PC
board. Since most of the important voltages going into an ATX board are
either 5V or 12V, why aren't you simply using regulators off the plane's
battery to supply the power? It would seem to me to be both cheaper as
well as inherently less noisy (not to mention lighter). You wouldn't
even have to do any special parts sourcing on these regulators as they
are redily available at you local radio shack (karmic regulators anyone?).

For a break out of ATX voltages, see the following link:
http://www.7volts.com/atx2.jpg

It takes time for many of the steps so I am looking for what you folks
think would be the 'biggest bang for the buck', or the right priority
to proceed with. (IE, build a brand new case for everything, build a
seperate case for the PSU, don't build a case right away but do X,Y,Z,
etc..)

Thanks once again for the brains helping noodle this over.


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