Re: Audio modulating SSTC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jan Wagner by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jwagner-at-cc.hut.fi>


> Anyone have a simple way to add a audio modulation control circuit to my
> SSTC coils????
> My output stage is a simple full-bridge type circuit.

That really depends on you controller stage. You could capacitively couple
some low voltage audio to the timing capacitor, to achieve a way of crude
frequency modulation. Or for a single output pulse width modulation IC,
feed the audio (properly shifted upwards in DC) and the ramp from the
timing capacitor to the error comparator.

Maybe a audio modulated dimmer circuit in front of the SSTC would work
too, but you very likely won't hear any of the audio from the streamers
any more (<60Hz). But it should have some odd streamer effects
nevertheless... :-)

cheers,

 - Jan

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 high voltage at http://www.hut.fi/~jwagner/tesla
 Jan OH2GHR