Hairpin Project

[jeanna]

Here is more that is relevant to our study :


But the effects which are produced by currents which
rise instantly to high values, as in a disruptive discharge, are
entirely different from those produced by dynamo currents which
rise and fall harmonically. So, for instance, there might be in a
given case a number of makes and breaks at d d equal to just
twice the frequency of the dynamo, or in other words, there may
be the same number of fundamental oscillations as would be pro-


317

duced without the discharge gap, and there might even not be any
quicker superimposed vibration ; yet the differences of potential at
the various points of the circuit, the impedance and other pheno-
mena, dependent upon the rate of change, will bear no similarity in
the two cases. Thus, when working with currents discharging dis-
ruptively, the element chiefly to be considered is not the frequency,
as a student might be apt to believe, but the rate of change per
unit of time. With low frequencies in a certain measure the same
effects may be obtained as with high frequencies, provided the rate
of change is sufficiently great. So if a low frequency current is
raised to a potential of, say, 75,000 volts, and the high tension cur-
rent passed through a series of high resistance lamp filaments, the
importance of the rarefied gas surrounding the filament is clearly
noted, as will be seen later; or, if a low frequency current of several
thousand amperes is passed through a metal bar, striking phe-
nomena of impedance are observed, just as with currents of high
frequencies. But it is, of course, evident that with low frequency
currents it is impossible to obtain such rates of change per unit of
time as with high frequencies, hence the effects produced by the
latter are much more prominent. It is deemed advisable to
make the preceding remarks, inasmuch as many more recently
described effects have been unwittingly identified with high
frequencies. Frequency alone in reality does not mean anything,
except when an undisturbed harmonic oscillation is considered.
   In the branch iiib a similar disposition to that in ib is illustrated,
with the difference that the currents discharging through the gap
d d are used to induce currents in the secondary s of a trans-
former T. In such case the secondary should be provided with an
adjustable condenser for the purpose of tuning it to the primary.
   iib illustrates a plan of alternate current high frequency
conversion which is most frequently used and which is found to
be most convenient. This plan has been dwelt upon in detail on
previous occasions and need not be described here.
   Some of these results were obtained by the use of a high
frequency alternator. A description of such machines will be
found in my original paper before the American Institute of
Electrical Engineers, and in periodicals of that period, notably
in THE ELECTRICAL ENGINEER of March 18, 1891.

I will now proceed with the experiments...

pp318-335 is the experiments part.
======

I think the high frequency alternator might be interesting to see.
I am still looking for the part about NOT looking for resonance.

jeanna

[sparks]

   Perhaps we are both right.  The standing wave field is developed using hamonic input frequencies which produces the standing wave.  This would be the make and brake of his motorized spark gaps.  Or just may be putting the generator or supply circuit into oscillation.  The spark gap is used first as a capacitive coupling between the oscillating supply and the output.  But upon this standing wavefield is induced a transient wave.  The rate of change (as I have referred to numerous times over in the jt thread) or what Steven Marks called the kick traverses the standing wavefield.  The transition from o to 3ooo volts to o produces electromagnetic radiation well above visible light if you get my drift.  If you start to get into nanometer wavelengths atoms start getting vibrated apart.  Again the energy needed to ionize an atom is more dependent on frequency than intensity.  Throw the sweep speed of your osciiliscope all the way up.  If your shot still shows a vertical line your getting close.  If you do the same and there is no line but your spark gap is emitting light and sound then we are getting close.

@Jadaro

  The Tesla patent # is 381,970   It was issued in 1888 when dc was being distributed

[jeanna]

OK here is my video replication using the joule thief instead of the sparks.

http://www.youtube.com/watch?v=4gj7IFCXw9Q

I works, folks.
In my view...
We need to understand how to calculate an equivalence of spiky volts and the volts we are accustomed to counting.
Anyone else?

wow, I am pleased!!

jeanna

edit
btw, I found this and copied it. Some of tesla's thoughts on resonance.
Yes Sparks I realize Tesla tuned his circuits. I did not mean to make it sound as though he did not.
j

[forest]

Jeanna,

Can you by using your JouleThief charge 400v electrolytic cap ? How fast can it be done ?
I think you can be interested also that Tesla radiant energy patent from 1900 indicate that you should be able to charge a cap by using a diode  joined  JT output with capacitor when one terminal of cap is connected to earth ground.

[jeanna]

Jeanna,

Can you by using your JouleThief charge 400v electrolytic cap ? How fast can it be done ?

Hi Forest,
Before I had a scope the way I measured my secondary results was with a
full bridge rectifier with
2 additional diodes one each way following the polarity from the bridge, and
a camera flash cap.
Depending on how much I had (of course, because caps fill fast then slow down as they get close to the limit), this filling could take anywhere from 5 seconds to 1 minute.
I stopped using this method long before I got voltages over 150v, so I do not know what will happen.
I would try this again with a smaller secondary to see.

I think you can be interested also that Tesla radiant energy patent from 1900 indicate that you should be able to charge a cap by using a diode  joined  JT output with capacitor when one terminal of cap is connected to earth ground.

I am interested in this.

thank you,

jeanna