I'd not say coincidence, but call it an isolated report. As to demonstrating it repeatedly... 1) Who'd volunteer for an unpleasantness? 2) Who'd inflict it on the unknowing? 2) Who'd pay for a properly run study that made his own company look bad?
Cortland KA5S > [Original Message] > From: Oscar Overton <[email protected]> > To: Chris Wells <[email protected]> > Cc: <[email protected]>; <[email protected]> > Date: 7/30/2008 7:12:05 AM > Subject: Re: RF What-if (was: RE: Another Cancer Scare?) > > Chris, > > Until you can do this repeatedly and the results are the same, you have > only demonstrated a coincidence. > > Oscar Overton > Product Safety > > > > > "Chris Wells" > <radioactive55man > @comcast.net> To > Sent by: <[email protected]>, > [email protected] <[email protected]> > cc > > 07/29/2008 10:23 Subject > PM Re: RF What-if (was: RE: Another > Cancer Scare?) > > > > > > > > > > Shifting gears all the way down to 60Hz and over to the magnetic field > exposure area..... > I had a set of? high power, wire wound resistors in a bank to disipate > alternating 10 to 20KW of power off a 3 phase 480V bus. > It was a lame means to simulate a field oil pump load for the development > of a pump off controller. > At the end of the day I would run the set up to test out the power meter > and had the resistor array about 6 feet from where I would sit. > (yes I realize that was not smart arc flash wise...) > I found that I was feeling ill like the flu each day at the same time. > I looked at the arrangement of resistors and found that they were very > much in phase and possibly making a large mag field. > I decided that a CRT monitor close the coils would make a magnetic field > detector and found the display to become significantly distorted. > Perhaps there are better sensors but use what you have. > So I moved the array to the other end of the lab away from my desk and ran > the power meters serial link up to my work area to get away from the > fields. > All the symptoms went away. > My co-workers said I was getting sick from the dust burning on the > resistors but I am still cautious. > > Chris > > From: Cortland Richmond > About 25??years ago I had a 2 meter beam set up on a bay window next to > the shack. The antenna was actually about 10 feet above my head in the 2d > story room, but far enough from the attic roof to turn freely.? Running > about 200 watts, I discovered that pointing the beam North? -and only North > -- I got terrible headaches when operating SSB. > > Not on CW. > > Some calculations showed exposure in that configuration was close to or a > bit over the then-current limit, or five times the Massachusetts draft > statute. .? I doubt, however, that this was a thermal effect. > > Some people who've met me (see you in August) may be thinking "THAT > explains it!" > > Phooey on them. > > Cortland > KA5S > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > 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] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
