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

[johnadonaldson at comcast.net]

With that much RF power floating around, I bet you could have wound a huge
coil and the eddie currents produced in it could have been used for powering
the COCO setup.

John Donaldson

-------------- Original message -------------- 

> >> The USA will never be destroyed by external forces. It will be destroyed 
> >> due to internal policies. But we're way off topic here! 
> > 
> > Of course it's way off topic. But some of us have an interest in keeping 
> > semiconductor systems working no matter who tries to kill them. And the 
> > biggest terrorist organization on the planet is HQ'd in Washington City. 
> 
> It'd be interesting to somehow rig an EMP test vault and check out the 
> CoCo capacity to withstand such an event... 
> 
> Some years ago while working on a Harris HT10FM transmitter room, we 
> could not use just any laptop as the thing could lock up when least 
> expected. The HT10FM was putting out 10kW of FM power, granted, most 
> of that energy flowed to the antenna elements way up on a 300 ft 
> tower, the tower was located abuot 140 feet from the TX room. We could 
> only get an old Zeos 286 laptop to work properly anywhere within the 
> confines of the small patch of land dominated by the FM tower, the 
> Zeos was all encased in metal except of course for the LCD screen. 
> Other equipment in the same location would freakout: one time a 
> surveying team panicked when their top of the line laser transit 
> system locked up and did not function; any video camera brought into 
> the area would show more or less moire patterns on the viewfinder and 
> that got into the tape as well. I had an F board CoCo setup in a 
> adjacent room (the "office" as the station owners said) and never had 
> a problem with it except for a very tough time setting up the proper 
> aluminum foil shielding for the B&W TV I had as a monitor. The CoCo 
> was mainly used as an entertainment system and a nifty calculator... 
> station logs were kept on Deskmate's SHEET application. 
> 
> Management never went for buying an EMF monitor (despite our calls for 
> one), and me and my colleague quit before we bought one for our own 
> use, so we never knew how much energy was floating around on that 
> particular site. 
> 
> Mmmm... pondering about it... I do have access to a phasor room 
> (directional AM site) where 50,000 watts of pure AM are just about 
> everywhere... phasor room walls neatly lined with copper... mmm... I 
> am taking the F board over there within a week and report the findings 
> to the group :-) 
> 
> -- 
> 
> 
> -=[ Rogelio ]=- 
> 
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