My first WFC/VIC

[nievesoliveras]

@all

I did not want to say anything yet, but I am having a tremendous success!!!!!!
http://www.overunity.com/index.php?topic=6362.msg158838#msg158838

Jesus

[fritz]

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Just recycle this thread.


Right now I do various measurements on my water-caps.
The simplest parameter is the internal resistance as a product of DC electrolysis and the envolved space/surface.
For my 10 cm size tube cell - this is about 20 Ohms, for the 30cm cell - its about 8 Ohms - and for a special cell 30cm long with 3 electrodes (double surface/space) its about 4 Ohms.
This resistance is what you got on the passivation cycles with DC.
If I apply DC pulses 10us / 1kV / rectangular - the cell seems to operate as a resistive load with exact the same resistance evaluated from not pulsed operation.
Comming back to the "miracle" question - I want to investigate further how that step charging is possible.
Is it caused by the pulsetrain itself (right now I only used single pulse) - or by the steep transients involved.
So I will do a test and record the current drawn during a pulsetrain.
Anyway - by some means I need this internal resistance to go up significant to achieve step charging.
A parallel LC circuit will have high impedance at resonance - transforming an applied pulse (if suitable) to increase the energy captured in the oscillation.

Another quite interesting test was to hook up the cell to an audio analyzer in kind of impedance-measurment fashion.
(measuring voltage vs. current phase) with small sinusodial AC signal form 20Hz - 20kHz.
The response was  as flat as can be - with no significant sign of a typical capacitive/inductive behaviour - using 22 Ohms and 100 Ohms current sensing resistor.
The interesting point was that I found a clear but very flat bell-shaped figure concerning the phase between current and voltage.
Around 12kHz, I have "0" phase - means pure resistive load.
Because of the flatness - I think that this might be an issue of the water itself.
Somebody to comment that ?

Another issue is the mechanical oscillation of the tubes.
If you look at the meyer setups - you have the outer tubes precisely mounted at the oscillation knots.
This is around 20% and 80% of the entire length. (slightly less than a quarter)
On the point of maximum field-strength (maximum voltage) there is the maximum force between inner tube
and outer tube - which causes a very tiny but relevant deformation of the tubes.
If you keep in mind that this influences the capacity of the cell - you have another charge-pump effect which
can be involved by certain degree.
If you decrease the capacity of a charged cap (in our case this is the relaxation after voltage peak) - the voltage
goes further up (because the charge stays the same).
This can have a kind of negative feedback property.
I don´t know so far what impact this issue has on the operation of the cell - maybe its just an intuitive design approach of no actual outcome - but in combination with some comments (outer tube should be of the seamless type) this could be the hint to some non-documented design issue.
We built our cells with similar mounting - optimized for maximum acoustic resonance - which is around 800Hz for the 30cm type.
Measurements of the oscillation in water shows that this is almost identical with the mechanical resonance if operated in water.
Any comments on that ?

rgds.