[Coco] CoCo vs EMP WAS--> Re: Coco Digest, Vol 24, Issue 48

[Mark Marlette]

Have to love it when the plan comes together! :)


Quoting johnadonaldson at comcast.net:

> I remember back when I worked at NASA in Houston, we were working on
> the SAS problem and we used chips bought at a local Radio Shack store
> and
> they flyed a shuttle misson. We took one of the backup chips and gave
> it to
> the local RS after the flight.
>
> John Donaldson
>
>
> -------------- Original message --------------
>
> > MArk
> >
> > The first microprocessor in space abord the Shuttle for experiments
> > was an RCA 1802. Being CMOS and could indure the harsh
> > radiation of space, it powered some of the first experiments in the
> > Shuttle bay.
> >
> > james
> >
> > On 13 Sep 2005 at 16:18, Mark Marlette wrote:
> >
> > Date sent: Tue, 13 Sep 2005 16:18:23 -0500
> > From: Mark Marlette
> > To: coco at maltedmedia.com
> > Subject: Re: [Coco] CoCo vs EMP WAS--> Re: Coco Digest, Vol 24,
> > Issue 48
> > Send reply to: CoCoList for Color Computer Enthusiasts
> >
> >
> >
> >
> > > james,
> > >
> > > Rad harden **might** still be a requirment for certain
> > > devices/applications. I work for a defense contractor and we
> design
> > > weapon system for the future. DOD has removed many of the
> requiremnts
> > > for qualified parts. In the past we used ALOT of rescreened
> > > components. Normal parts that are tested/screened and certified.
> Take
> > > a $0.25 part and it becomes $125. Commercial/Industrial parts
> yields
> > > are so good that the add cost couldn't be validated. Most of the
> > > common electrical assemblies are call COTS(Consumer Off The
> Shelf)
> > > components.
> > >
> > > Control system is still our design. Electrical motor drives
> switching
> > > 1000A RMS at 650v 3 phase bus voltages.......... :)
> > >
> > > Mark
> > >
> > > Quoting jdaggett at gate.net:
> > >
> > > > Rogelio
> > > >
> > > > There are chambers set up to test semiconductors for EMP.
> > > >
> > > > IN fact a lot of CMOS devices will qualify. If I recall CMOS is
> more
> > > > immune than NMOS or PMOS to such events. Still the military in
> many
> > > > key equiptment use what is called radiation harden
> semiconductors.
> > > > One other method would be to enclose your Coco in a magnetic
> > > > shielded box that would supply around 100 dB of isolation.
> > > >
> > > > james.
> > > >
> > > > On 13 Sep 2005 at 15:03, Rogelio Perea wrote:
> > > >
> > > > Date sent: Tue, 13 Sep 2005 15:03:47 -0400
> > > > From: Rogelio Perea
> > > > To: coco at maltedmedia.com
> > > > Subject: [Coco] CoCo vs EMP WAS--> Re: Coco Digest, Vol 24,
> > > > Issue 48 Send reply to: CoCoList for Color Computer Enthusiasts
> > > >
> > > >
> > > >
> > > >
> > > > > It'd be interesting to somehow rig an EMP test vault and
> check out
> > > > the
> > > > > CoCo capacity to withstand such an event...
> > > >
> > > >
> > > >
> > > > --
> > > > Coco mailing list
> > > > Coco at maltedmedia.com
> > > > http://five.pairlist.net/mailman/listinfo/coco
> > > >
> > >
> > >
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> >
> >
> >
> > --
> > Coco mailing list
> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>