Original poster: Terry Fritz <teslalist@twfpowerelectronics.com> Hi, At 07:43 PM 9/28/2003, you wrote: >When they were showing one at school (induction coil), they said they >could produce xrays. Is this true? The induction coil itself cannot produce X-rays. However, if it is connected to certain types of vacuum tubes, those tubes excited by high voltage can produce X-rays. Cheers, Terry