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: roger.vi...@wwgsolutions.com [SMTP:roger.vi...@wwgsolutions.com] > Sent: Thursday, August 05, 1999 2:28 AM > To: Lacey,Scott > Cc: 'Price, Ed'; 'emc-p...@ieee.org' > 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" <sla...@foxboro.com> on 04/08/99 16:37:09 > > Please respond to "Lacey,Scott" <sla...@foxboro.com> > > To: "'Price, Ed'" <ed.pr...@cubic.com> > cc: "'emc-p...@ieee.org'" <emc-p...@ieee.org> (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:ed.pr...@cubic.com] > Sent: Monday, August 02, 1999 5:35 PM > To: 'Arun Kaore'; 'emc-p...@majordomo.ieee.org' > 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 > ed.pr...@cubic.com > 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 majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > > > > > > > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
