Re: Low Frequency Coils and AF

> Ive been wondering of late about building a coil in the 20km range.
> 15kHz is in the audio frequency band! Is it possible that a coil
> like this might actually produce sound? I cant imagine it would be
> very much. (I'me not suggesting it would put out 'pure' AF or anything 
> weird like)I just wonder if the streamers might 'shake' the air, or
> perhaps the cap might act as strange kind of 'transducer'. Caps 
> certainly 'hum' with 50Hz, why not with 15kHz ? Hmm....just a 
> thought.
> Anyone tried a coils with AF  frequencies?

Not Tesla coils but...

I saw a high-voltage power supply at a laser trade show a few years 
ago that was modulated at AF while drawing an arc.  It gave a very good 
rendition of the "1812 Overture" and was quite impressive.  Along the 
same lines but many years ago, I read about some audiophile 
speakers that used a modulated plasma to produce the sound.

Steven Roys (sroys-at-radiology.ab.umd.edu)