[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

>

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