Re: [TCML] static gap singing coil hybrid.

[Scott Bogard <sdbogard@xxxxxxxxx>]

Phillip,
	I was planning on eventually building a DC coil eventually anyway, and 
I have enough microwave oven capacitors and diodes that I could build a 
MOT based level shifter with all the current I can handle, not sure if 
that would cut it or if I would need a resonate charging inductor, which 
could be made with more MOTs in theory.  Since it is triggered it 
shouldn't need an especially high voltage I suppose, so 4kV was where I 
was aiming.  The biggest hurtle I see is cooling, having that arc that 
close to glass for prolonged periods will be tricky, but maybe if I run 
cold air or oil or even water through the tube, its life expectancy 
should be similar to glass jar capacitors I'd imagine, even if I only 
get 15 minutes out of it glass tubing is a lot cheaper than IGBT's, and 
is easy to replace...

Scott.

On 1/25/2011 1:13 PM, Phillip Slawinski wrote:
> Scott,
>
> While this looks okay in theory, there would be some limitations.  The main
> limitation would be that this could only work with a DC charging system.
> This adds complexity to the project, because you must then locate large HV
> filter caps, diodes, and a properly designed charging reactor.  Aside from
> those issues, I don't see any fundamental reasons why it can't be done.  If
> you do this please share your results.
>
> -Phillip
>
> On Tue, Jan 25, 2011 at 11:44, Scott Bogard<sdbogard@xxxxxxxxx>  wrote:
>
> > Greetings all,
> >      So I was looking at this web page today at work for no particular
> > reason...
> > http://www.glacialwanderer.com/hobbyrobotics/
> > If I am understanding this correctly, he essentially built a spark gap
> > triggered by the corona around the inner glass tube from his trigger
> > coil.  If that is correct would it be terribly easy (if extremely
> > inefficient) to make a singing coil by constructing a similar spark
> > gap (with better cooling for actual run times) and just trigger the
> > inner coil with a midi signal.  This way for those of us who don't
> > want to tackle DRSSTC yet, can just build essentially a midi triggered
> > flyback, to gain familiarity with the audio interfacing without the
> > added complication of going strictly solid state, and the expense of
> > IGBTs.  Has anyone tried this?
> >
> > Scott.
> > _______________________________________________
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