Re: hand crank coil for demos

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

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...)
>
>
>
>