I remember talking to some CIA type folks who said power lines were being monitored back in the 1960's because electric typewriters created distinctive voltage spikes marking the stroke of the keyboard and when the key actually hit the ribbon, and the time delay between the two spikes determined what letter had been struck...
best regards Tom Cokenias T.N. Cokenias Consulting P.O. Box 1086 El Granada CA 94018 On Jul 13, 2009, at 9:40 AM, Bill Owsley wrote: Around 1980 a guest professor demonstrated that technique using radiated emissions. The receiving equipment fit into a large briefcase. - Bill Indecision may or may not be the problem. --- On Mon, 7/13/09, Derek Walton <[email protected]> wrote: From: Derek Walton <[email protected]> Subject: WHAT GOES AROUND COMES AROUND To: "[email protected]" <[email protected]> Date: Monday, July 13, 2009, 12:30 PM http://news.bbc.co.uk/2/hi/technology/8147534.stm - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected] <http://us.mc396.mai .yahoo.com/mc/[email protected]> > All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected] <h tp://us.mc396.mail.yahoo.com/mc/[email protected]> > Mike Cantwell <[email protected] <htt ://us.mc396.mail.yahoo.com/mc/[email protected]> > For policy questions, send mail to: Jim Bacher: <[email protected] <http: /us.mc396.mail.yahoo.com/mc/[email protected]> > David Heald: <[email protected] <http:/ us.mc396.mail.yahoo.com/mc/[email protected]> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
