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

[jdaggett at gate.net]

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 <mark at cloud9tech.com>
To:             	coco at maltedmedia.com
Subject:        	Re: [Coco] CoCo vs EMP WAS--> Re: Coco Digest, Vol 24, Issue 48
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> 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 <os9dude at gmail.com>
> > 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
> > <coco at maltedmedia.com>
> > 	<mailto:coco-request at maltedmedia.com?subject=unsubscribe>
> > 	<mailto:coco-request at maltedmedia.com?subject=subscribe>
> >
> > > It'd be interesting to somehow rig an EMP test vault and check out
> > the
> > > CoCo capacity to withstand such an event...
> >
> >
> >
> > --
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> > Coco at maltedmedia.com
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> >
> 
> 
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