The TPU uncovered? (A PROBABLE technique.)

[sparks]

Anyone ever seen a waveform like this? 

This is from Ossie's magnet motor - Bedini-ish type.

I have seen similar (a little sweeter) from a Newman motor.

Yes I have.  It looks like a variable frequency induction motor drive waveform output.  Lots of little energy bursts slamming into counteremf low freq.

[Spider]

Gentlemen, my compliments, you have build some very nice coils in such a short time


Greetings Spider.

[EMdevices]

@wattsup,  not sure what you're doing there, but I suspect you're not hooked up correctly to see any delay.  Grumpy's diagram on the previous page is not wired correctly (scope in the wrong place).

Take a look at my new diagram below.

What happens is that when the voltage of the square wave transitions, the iron coil doesn't conduct current right away for that particular polarity, and a voltage drop occurs across it  (V = L di/dt)  and as the current increases other components get loaded and carry the voltage drop, so basicaly this is seen on the scope as a delay(with time pulses, and as a phase shift with sinewaves).

In your case, your Z = jwL,  (an inductor)  and for this you will not see a delay since I suspect the inductance of the iron coil is a very small percentage of the inductance of the larger coil.  What "Z" you use makes a difference.   

Anyway, that's my take on this whole delay business.  If you understand phasors you will see how a coil  (and a capacitor) introduce a 90 degree phase shift.  The iron coil just has more inductance per length of wire compared to copper, but it can't compete with a copper coil that has a huge number of turns.

EM

P.S.  Obviously, both probes are referenced to ground, just like the signal. 

[forest]

Gentlemen, my compliments, you have build some very nice coils in such a short time


Greetings Spider.

May I ask if your coil is generating sound ?

[Spider]

@forest,

I havent heard any sounds yet. Maybe with high voltage, but i am still working on that.

@wattsup.

In the beginning I made some smaller diameter iron coils, about 10 mm and I saw hardly any delay.
Try a 30 to 35 mm diameter coil, 30 turns. The winds as close as possible. Thin wire.
Did you use a steel spring as coil? I think pure iron is best. Its hard to get tho, most is covered with zinc or something.

Greetings Spider.