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Old 11-20-2012, 01:10 AM
Farmhand Farmhand is offline
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Join Date: Jun 2010
Location: Australia
Posts: 3,387
Yesterday I connected a small receiver to ground and scoped the output coil
while a storm approached. I could see on the scope lots of disturbance from
the lightning. There appears to be a brief disturbance of static type noise just
prior to the lightning, I put this down to interference caused by the leaders
forming just before the strike. Then when the strike happens the oscillations
gain power for a bit. I was able to collect some energy from the storm in a
capacitor, I charged it to 250 mV 200 uF while I was scoping the output
coil to the cap.

I observed Beats within the constantly changing wave form, the radio signal
was wiped out during the storm, by listening to the speaker using an amplifier
on the output coil i could tell when a lightning strike was about to hit because
of the (leader noise).

With the little receiver I built if I input about 1 volt point to point to the
ground lead (bottom of the secondary via just one connection) I get a few
volts from the output coil. So if I put 1 volt into 400 turns I get 2 or 3 volts
from the 10 turn output coil. Cool. So much for stepping down the voltage.

The reality is that the oscillations from the lightning have little amplitude so to
get any useful power from them there must be a huge magnification to
concentrate that power. If the Earth oscillations were in the range of 10 volts
or so it would be easy to tap the energy. Wardenclyffe was to vibrate the
planet to increase the oscillations to a usable level. Then anyone could
connect a receiver to the ground and tap the vibrations. It could not be
policed for small scale uses (metered) but large consumers (industry) could
have the power used metered because they wouldn't be able to hide it.

Some peaks of energy could add to a Tesla system's usable energy if they
exceeded the potential of the ground disturbance and added to it, in reality
50% of lightning strikes would be out of phase and cancel usable
energy/power from the system.

Here's a picture of the small portable receiver I built, It tunes between about
660 kHz and 860 kHz. I chose to not use a variable capacitor in the primary
because i might use it for some HV experiments so the tuning for the primary
is done with the two variable inductors, the oscillating circuit can have
capacitance added to the terminal as well as some adjustment with the plate
also there is a variable inductor between the secondary and ground
connection. I can listen to the radio station at 840 Khz with it.
It's a bit rough and dodgy but it works, gotta test what works and what
doesn't for us.


Last edited by Farmhand; 11-20-2012 at 01:40 AM.
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