There is a nice picture of the underground facility at http://www.celesticades.com/conformance/conformance.htm
I have been told that it has the characteristics of an ambient-free OATS, but if you need to go back to your car to get a screwdriver, it can take some time. Regards, Geoff Lister > From: "Aschenberg, Mat" <[email protected]> > To: "'[email protected]'" > <[email protected]>, > "Lacey,Scott" <[email protected]> > Cc: "'Price, Ed'" <[email protected]>, > "'[email protected]'" > <[email protected]> > Subject: RE: cost effective EMC facility > Date: Thu, 5 Aug 1999 07:16:54 -0600 > Reply-to: "Aschenberg, Mat" <[email protected]> > > I was under the impression that we were discussion the "Cost-effective" emc > testing solutions, not the cost-absurd solutions. Maybe salt mines are going > for a lot less these days. > > > -----Original Message----- > > From: [email protected] [SMTP:[email protected]] > > Sent: Thursday, August 05, 1999 2:28 AM > > To: Lacey,Scott > > Cc: 'Price, Ed'; '[email protected]' > > Subject: RE: cost effective EMC facility > > > > > > > > > > A very large EMC test site has been operating underground in England for > > some > > years. This is in Cheshire where salt is mined, leaving large underground > > open > > spaces surrounded by absorbing salt-laden walls. The reduction in ambient > > emissions is another benefit of this site. As an article in the UK EMC > > Journal > > reports (http://www.emc-journal.co.uk/archive1/980402.html) , it is now > > run by > > Celestica. > > > > Roger Viles > > WWG > > > > > > > > > > "Lacey,Scott" <[email protected]> on 04/08/99 16:37:09 > > > > Please respond to "Lacey,Scott" <[email protected]> > > > > To: "'Price, Ed'" <[email protected]> > > cc: "'[email protected]'" <[email protected]> (bcc: Roger > > Viles/PLY/Global) > > > > Subject: RE: cost effective EMC facility > > > > > > > > > > > > Ed, > > > > I find your idea of a salt water ground plane very intriguing. I imagine > > the > > salts used would involve more than just table salt, and the chemistry > > would > > have to be checked and adjusted regularly, similar to a swimming pool. The > > problem of stratification could easily be solved with circulator pumps, > > which would be turned off just prior to actual use (those of you near > > fault > > lines might take advantage of natural agitation, your salt water pools > > would > > be "shaken, not stirred"). : ) > > > > On a related note, does anyone have any experience doing EMC scans below > > ground? It seems that the earth would be about the lowest cost shielding > > material available. Perhaps an updated and enlarged version of the early > > pioneers "soddie" (sod hut) might be just the ticket. It might even > > incorporate a salt water ground plane. A side benefit would be that EMC > > engineers might gain some useful exercise by swimming a few laps at lunch > > time (how many laps around the turntable/raft equals one mile?). : ) > > > > Scott Lacey > > > > -----Original Message----- > > From: Price, Ed [SMTP:[email protected]] > > Sent: Monday, August 02, 1999 5:35 PM > > To: 'Arun Kaore'; '[email protected]' > > Subject: RE: cost effective EMC facility > > > > > > Arun: > > > > I was just struck by what you said about "setup a Sea Plane or a > > salt water > > based site" . Has anyone ever set up an OATS using salt water as > > the ground > > plane? Talk about excellent surface smoothness, easy to level and > > cheap > > material, plus simple repair! (Uhh, could we say it fixes itself?) > > > > Just what conductivity would be enough? Could we get enough > > conductivity > > before we reach salt saturation? > > > > I suppose the upper limit on surface area would be when we get to > > the point > > of the wind causing surface ripples. Or gravitational tides. > > > > Turntables might be a lot cheaper, too. Just a thin raft that > > floats. > > > > Seriously, has anyone tried this for an OATS? (I seem to recall the > > US Navy > > had a really big ship simulator here in San Diego, where they placed > > scale > > models of ships on a sheet-steel "sea" in order to model HF wire > > antennas.) > > > > Regards, > > > > Ed > > > > > > :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):- > > ): > > -):-):-):-):-):-):-):-):-):-):-):-):-):-):-) > > Ed Price > > [email protected] > > Electromagnetic Compatibility Lab > > Cubic Defense Systems > > San Diego, CA. USA > > 619-505-2780 (Voice) > > 619-505-1502 (Fax) > > Military & Avionics EMC Services Is Our Specialty > > Shake-Bake-Shock - Metrology - Reliability Analysis > > > > :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):- > > ): > > -):-):-):-):-):-):-):-):-):-):-):-):-):-):-) > > > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to [email protected] > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to [email protected], > > [email protected], [email protected], or > > [email protected] (the list administrators). > > > > > > > > > > > > > > > > > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to [email protected] > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to [email protected], > > [email protected], [email protected], or > > [email protected] (the list administrators). > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to [email protected] > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to [email protected], > [email protected], [email protected], or > [email protected] (the list administrators). > > *Geoff Lister email: [email protected] *Motion Media Technology Ltd., Horton Hall, Horton, Bristol, BS37 6QN, UK. *POTS : +44-(0)1454-313444 or +44-(0)1454-338561 (direct) *ISDN : +44-(0)1454-338555 or +44-(0)1454-338554 (direct) *FAX : +44-(0)1454-313678 Home : +44-(0)1275-854025 *WWW : http://www.motionmedia.co.uk/ * The Videophone Company - Seeing is believing --------- This message is coming from the emc-pstc discussion list. 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