Unable to account for frequency related to Magnet being pulsed by Inductor

[MACEDONIA CD]

@DUFF  OK  FIND PLACE  AND  SEE WHAT WHILL BE  IF YOU HAVE SOME PROBLEM IM HERE TO  FIND  SOLUTION 

BUT  I SAY AGAIN MAST  BE HAVE EFFECKT OF SPINING THE FILD 

[duff]

I have been delayed in running the test.

I'm having to build an oscillator that will run on 12VDC.

[BEP]

@duff

There is one possibility I can think of that could create similar results to mine.

Your plated magnet is likely plated in nickel. Nickel is highly magnetostrictive in action. All it would take is a strong pulsing perpendicular magnetic field to the magnet's field.

Ceramics also have some nickel in them.

If this is the case then a form of SAW (Rayleigh wave) may be happening and your shiny magnet may explode under extremes 

The only way I could understand this working is if the field from the coil was causing the magnet field to drop below saturation. If so, it would only work with one polarity pulse to the coil.

[duff]

@BEP

When moved the circuit from a breadboard and soldered everything in place the 35KHz ringing I previously had went away.


Below is the current driver circuit. Everything on the right side of the inductor is not being used. This is Tommey Reed's circuit (with different components).  He was driving using to drive a motor with BEMF. I replaced the motor with a dummy load (100Ω resistor).

Do you think the negative 12V in the scope shot would keep from working as yours?

[BEP]

@BEP

When moved the circuit from a breadboard and soldered everything in place the 35KHz ringing I previously had went away.

You probably had some unexpected capacitance in the wiring before. Do you have the same singing magnet as before?

Below is the current driver circuit. Everything on the right side of the inductor is not being used. This is Tommey Reed's circuit (with different components).  He was driving using to drive a motor with BEMF. I replaced the motor with a dummy load (100Ω resistor).

Do you think the negative 12V in the scope shot would keep from working as yours?

I'm not using a FG. I have back to back regenerative magnetostrictive oscillators working as a multivibrator.