cogr

Except that it does. Chemring continues to sell the very same 'defective' cutters to the military but somehow that doesn't seem to bother anyone.

This is wrong. Bit flip used to be a problem in early memory devices and was caused by the alpha decay of radioactive trace isotopes in the epoxy resins used for chip packaging. The solution was found in cleaner resins. Recently the problem has returned in the form of "flip chips", where the chip packaging is so thin it doesn't offer much protection against alpha particles. This time the cause was found in radioactivity from solder joints in the chip carrier. For details see http://direct.xilinx.com/bvdocs/whitepapers/wp208.pdf The devices used in the vigil have ordinary SO and flatpack outline and do not exhibit bitflip. --- High frequency fields. The entire circuit board will be fried long before you'll get a single bit to flip from a HF field. BTW, there is no such thing as emc radiation. --- Aging. It's true, silicon chips do age. Thats why they have a MTBF. But let's pretend you jump 365 days/year, for 20 years and the device is powered on for 14 hours/day. You'll amass just over 100K hours, way below the chip's MTBF, especially after burn-in. --- Component grades. There's commercial, industrial, and mil-spec. Some component manufacturers may offer product versions with additional reliability screening. There is no aerospace component grade. Of course it's possible to create an assembly that conforms to local aerospace regulations. Usually this is done by using milspec components at critical points. --- Hmm, i had a point when i started, but i forgot. Cheers

google "ACEMCP593PRO.EXE" Lots of codecs plus assorted freeware tools.

Without comment

Sounds like scientology