Re: hand crank coil for demos

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

Hmmm... I am thinking about extracting, say, 50-100 watts from a third
grader (8-9 year old)... Or, in a huge experiment... gang some in
parallel... (no.. the mechanical aspects are too complex)...

No question, electrostatic machines are nifty... spinning disks, snapping
sparks, etc...

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, April 10, 2002 8:03 PM
Subject: Re: hand crank coil for demos


> Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>
>
> Tesla list wrote:
> >
> > Original poster: "Matthew Smith by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <matt-at-kbc-dot-net.au>
>
> > Er, perhaps I should whisper this, what with this being a TC list, but
> > you can get some very impressive results with hand-cranked electrostatic
> > machines as our friend Dr de Queiroz could doubtless tell us ;-)
>
> 12 cm sparks are easy to generate, up to several per second with a 30 cm
> disk machine of almost any kind. A few Watts of output at most for about
> 4 times greater mechanical power. At the reasonable limit for hand-
> cranking and a large machine, sparks of maybe 30 cm (12") can be
> produced.
>
> I have an old telephone crank generator, that produces up to 100 V. I
> can
> make it power an ignition coil, by rectifying its output to charge a
> capacitor of a few uF, and use an SCR with a neon lamp or two, in series
> with a resistor from cathode to gate, to discharge the capacitor over
> the primary of the coil. Works, but a static generator produces much
> better output...
>
> Antonio Carlos M. de Queiroz
>
>
>