Re: [TCML] Best place to insert audio modulator

[Henry Hallam <hallam@xxxxxxx>]

I'm not sure if anyone's managed to audio modulate a spark-gap TC with 
any success.  It seems unlikely to me because the break rate is in the 
200Hz region, and I think this dominates the spectrum of the sound 
produced by the coil.  So any modulation overlayed on that ought to be 
limited to < 200Hz of bandwidth.

Most audio-modulated coils are solid-state or vacuum-tube devices which 
allow control over a much wider range of frequencies.

- Henry [speaking without any audio-modulation experience]


Stephen J. Hobley wrote:
> If I understand the theory of TC audio - we have to turn the coil on and off at specific frequencies. Where is the best place to insert the modulator - before or after the NST?
>  
> Am I right that some people have tried a PWM signal to create a "speaker" out of their tesla coils?
>  
> Steve
>  
> Stephen Hobley Photography
> www.stephenhobley.com
> 317 201 4281
>  
> The Laser Harp Project - www.stephenhobley.com/build
>
> ________________________________
>
> From: tesla-bounces@xxxxxxxxxx on behalf of McCauley, Daniel H
> Sent: Thu 3/27/2008 9:00 AM
> To: Tesla Coil Mailing List
> Subject: RE: [TCML] tesla tuner
>
>
>
> Secondary resonance looks like a shorted impedance, therefore current
> draw will be maximum (brightest)
> Primary resonance (parallel) looks like a high impedance, therefore
> current draw will be minium (dimmest)
>
> You really dont' need to build anything if you have an audio oscillator
> (such as HP200) or other function / signal generator.
>
> Dan
>
>
>
> Daniel McCauley
> Transmitter / High Voltage Engineer
> Lockheed Martin MS2
> Mailstop 142-1
> 199 Borton Landing Road
> Moorestown, NJ 08057
> (856) 722-2387
> daniel.h.mccauley@xxxxxxxx
>
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Stephen J. Hobley
> Sent: Wednesday, March 26, 2008 11:55 PM
> To: Tesla Coil Mailing List
> Subject: [TCML] tesla tuner
>
> Tesla Tuner
>
> Am I right that if we build this, then we set it on the secondary first
> to get the brightest LED / lowest frequency - then apply it to the
> primary and adjust the tap to get the same brightness on the LED?
>
> Steve
>
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