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I wonder what this sounded like on an AM radio. I bet you could hear it for MILES away on AM radios. I wonder if HAM operators get peeved with events like this?

Nice site, Check out mine aswell..

http://www.hotmusictones.blogspot.com

Well, Being in the overlap zone of the Venn-Diagram of HAM Radio operators and Tesla Coilers I can offer the following thoughts.

One: Tesla coils are classed as an unintentional radiator, if there are reports of interference to licensed users of the spectrum, the FCC may require the coiler to change how/when they operate, or the fundamental design of the coil to shift the frequency.

Two: Coils are actually pretty clean radiators, when built properly, they emit all of their energy at one frequency, and due to the L/C relationship of a tesla tank coil circuit itself, the fundamental harmonics (x2, x4, x8, x16 etc) So even a coil operating at 60KHz, will only show up at 60, 120, 240, 480, 960 KHz, and even then the 480 and 960 emissions are several dozen dBmV below the noise floor, in most areas. Now I wouldn't operate one of these in the NRQZ ( http://en.wikipedia.org/wiki/United_States_national_radio_quiet_zone ) of course, but still for normal use it shouldn't provide more than occasional UWB interference that is easially overcome with even human hearing. Hell, solar flares are more annoying on the HF bands to us HAMs...

Just my thoughts. Sadly due to living considerations I no longer have my wonderful workshop to tinker, and I never got around to a solid state coil. I have several coils in various stages of completion in a storage unit though.

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