Akula eternal lantern 4

[hartiberlin]

Yes could be overshot. I think in #64 posting were the Akula scopeshots..

The question is , if these overshots and base bursts only occur at the low supply voltages like 3 volts ??

[hartiberlin]

From Itsus scopeshots we can see , that this center spikes ocCurs , when the coil charge current is at its maximum and stops charging the coil field. as thid is a change in dI/ dt inside the coil we also get an induction voltage it seems , but it is quite high....

[Void]

In his video, Akula really seems to be stressing that he thinks those exponentially
rising waveforms on the collector are indicating extra energy coming from the ferrite.
That being the case, it then seems important to determine if those waveforms really exist or
if they are just due to some glitch with the scope when set to below 5V/div. I figured an
easy way to determine this would be to put one scope probe (blue) on my Drain showing the
big curved waveforms on the Drain, and the other  scope probe on the secondary winding to
see if those same waveforms are transferring to the secondary. Should be a straightforward test. 
Well, it turns out even this is not free from weirdness. With the yellow probe on the secondary winding,
it does not show the big curved pulses when the scope is set to 5V/div, but does show the big
curved pulses when the scope is set to 2V/div. So it doesn't matter whether the scope probe
is on the Drain or across the secondary winding. The same weirdness occurs between setting the
scope to 2V/div and 5V/div. It seems the scope is generating this difference in the internal processing
of the signal since it doesn't matter whether the probe is on the drain or on the secondary winding.
I can put my scope probe on the calibration lug on the front of the scope to display the calibration squarewave,
and then switch between 2V/div and 5V/div and not see any changes in the waveform shape. I
really can't understand why this is happening. The mind boggles... 

[Void]

To further compound the mystery with the scope showing different waveform
shapes depending on the voltage vertical scale setting, I kept all settings exactly the same
with my pulse driver (same pulse width and frequency) and just replaced the coil on the
Drain with a 1k ohm carbon film resistor. I then took scope shots with the voltage setting
at both 2V/div and 5V/div. There is no change to the shape of the waveforms at all in this test,
even though the pulse width and pulse frequency are identical. The only difference is I am
pulsing a 1k resistor here, and I was pulsing a coil on a ferrite core previously. I really do
not understand this. There may be a simple explanation, but whatever it is it is eluding me.   

[hartiberlin]

Here is an old scopeshot from my. newman research.
http://www.overunity.com/newman2/myspike3.jpg

It only showed these large negative going spikes at the 2 lowest
Volts/div settings...
Strange...