Re: hand crank coil for demos

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

Original poster: "Matthew Smith by way of Terry Fritz <twftesla-at-qwest-dot-net>" <matt-at-kbc-dot-net.au>

Hi Jim / All


> 
> Does anybody have any information on the voltage/current/frequency output
> from the usual "field telephone" hand crank generators? 
> 


If they are anything like the generators used in the old Megger testers 

(see my recent post on this subject), you could get several hundred to 1kV

without over-strenuous cranking.  However, if the cranking ain't 
strenuous, there can't be lot of power going in there - therefore (why
doesn't ASCII have a standard therefore sign?) I don't think there could 
be much current in there.  The Meggers use alternators therefore
frequency would be something to do with speed and pole pairs that I 
can't quite remember ;-)

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 ;-)

Last word - you can generate a high (enough to give a kick) voltage at 
miniscule current by cranking a microwave oven turntable motor.  Found 
that out by mistake...

Cheers


M

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