Negative Inductance and measure of Magnetic force.

[synchro1]

Anyone remember Tinklecornola's Evostar's thread diatribe last year denying that the "Inverse Henry" was identical to the value measured by Synchro1's inductance meter in the video above?

Everyone can trust this crank to help explain "Flyback", right?

[ramset]

Synchro
perhaps instead of remembering it would be better to explain /summarize the claim right here right now
and move forward not backward...


what does an inverse henry do on the bench that makes it valuable ?


not looking to Fight
Just understand


and it was Lunch break....


respectfully
Chet K

[synchro1]

Synchro
perhaps instead of remembering it would be better to explain /summarize the claim right here right now
and move forward not backward...


what does an inverse henry do on the bench that makes it valuable ?


not looking to Fight
Just understand


and it was Lunch break....


respectfully
Chet K

@ramset,

What I demonstrated in the video is a "Mag Amp". This kind of coil and variable ferrite core acts as a transistor base for magnetic current, not electrical.

[partzman]

@ramset,

Here's the video I promised. I hope this helps:

https://youtu.be/Yoqct2EdM4g

This video demonstrates the value of the "Inverse Henry".

Hi synchro,

I watched your video with interest but there is one question that I have.  Are you sure that your inductance meter is zeroed during this demo?  One simple way to tell is to short across the copper coil with a jumper while it is attached to the meter and see if the reading is still negative or actually goes to zero.

Regards,
Pm

[synchro1]

Hi synchro,

I watched your video with interest but there is one question that I have.  Are you sure that your inductance meter is zeroed during this demo?  One simple way to tell is to short across the copper coil with a jumper while it is attached to the meter and see if the reading is still negative or actually goes to zero.

Regards,
Pm

@partzman,

Good point. The answer is yes, I shorted and reset the meter numerous times to double check the zero point. The important feature is that the negative and positive range value are in direct proportion to the position of the ferrite core relative to the zero line.