[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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