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>

I would expect frequency to be in 20 Hz area... Standard ring frequency for
telephones..  Standard ring voltage is 180V P-P, superimposed on the 48 V
normal bias.  Maybe 33 Hz for your measurement.. (i.e. 0.033 kHz)

Hmmm... charging a small  marx... that would be cool...  crank,crank, crank,
then bang....

You can get a few hundred watts out of a bicycle pedal apparatus, so maybe
that's a better deal for a TC...

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, April 09, 2002 6:58 PM
Subject: Re: hand crank coil for demos


> Original poster: "Jonathan Peakall by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jpeakall-at-madlabs.info>
>
> Jim,
>
> The one I have can produce up to 150-180 volts, frequency on my crappy
meter
> is .033 on the 20khZ scale, so that is 330 hertz, no? Current I have no
data
> for.
>
> I have tried several times to use this to power stuff, with limited
results.
> Best was with an ignition coil/relay type chopper/capacitor setup, and I
did
> get it to run a small Marx generator. However, it did float at HV, meaning
> it would shock me, but I'm sure MOVs and diodes or something would sort
that
> out.
>
> My current plan is to run a flyback with it. Step it down do bring the
> voltage down and current up, then oscillate the flyback with it. I just
got
> my flyback setup running, haven't had time to play with the hand crank
yet.
>
> If you run across more information, please let me know. Hand powered HV is
a
> major goal for me, students would love it in the classroom.
>
> Regards,
>
> Jonathan Peakall
>
> ----- Original Message -----
> From: Tesla list <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Tuesday, April 09, 2002 11:31 AM
> Subject: hand crank coil for demos
>
>
> > Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <jimlux-at-earthlink-dot-net>
> >
> > Does anybody have any information on the voltage/current/frequency
output
> > from the usual "field telephone" hand crank generators?  It strikes me
> that
> > a cool demo for the kids would be to have a hand crank (or bicycle rig)
> > that hooks up to a HV display (a TC).. the faster you crank, the bigger
> the
> > sparks...  Sure, you could just hook up an auto alternator, an inverter,
> > and feed a NST, etc... but, that's a bit complex...
> >
> > This is a great motivator when demoing for a group.  When I built
plastic
> > bottle rockets (water and air propellant) for the kids, the hand bike
tire
> > pump was a big hit... The more you pump, the higher the rocket goes...
> > (after a while, we fell back on the 2HP compressor, but...)
> >
> >
> >
> >
>
>
>