From: Finn Hammer
Date: Sun, 28 Oct 2001 16:02:41 +0100
Subject: [TSSP] EMI measurements
Gang! I posted this info to the pupman list, but for some reason it did not seem interesting. However, I think that the first public measurements of a Tesla coil`s electromagnetic radiation just has _got_ to be interesting, so in the light of this lists longlasting quietness, I allow myself to break the silence and tell you: That the Museum coil was run for some length of time, and the emission was recorded by an appropriate Rohde&Schwarz instrument (yeah! I forgot to write the No. of the instrument down, but it was as big as a baking oven). The antenna was a fancy one too. I don`t know if there is any need to discuss this much, but I want to be sure that this is being noticed by you who are able to picture the consequences of the fact that an operating coil is a broadband transmitter, starting out 70dB too loud at 30 MHz and continuing to be 40dB too loud at 1GHz. The coil during measurement: http://home5.inet.tele.dk/f-hammer/measurecoil.jpg To give you an idea about the power level that is being used.(345K) The antenna: http://home5.inet.tele.dk/f-hammer/antenna.jpg (345K) The emission files: http://hot-streamer.com/temp/Hor_10m.doc http://hot-streamer.com/temp/Ver_10m.doc http://hot-streamer.com/temp/BG_Ver_10m.doc For more information about the museum coil, go to: http://home5.inet.tele.dk/f-hammer/tesla/tesla.htm Cheers, Finn Hammer
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.