Video of new oscillator:

https://youtu.be/qGIuoLHgX9c

We can see the solder joint a little to the right of the center between the coils. Also, the backing ceramic block which I place under the coaster beneath the electromagnet and the silicon steel core visible inside the top coil core: This version is delivering some gauss per watt dividends!

Here's a comparison of inductance measurements: The 500 Newton electromagnet measures .052 Henries of inductance; The silicon steel coil .101. That makes the home made electromagnet twice as powerful, at over 200 pounds of attraction force!

What's the best way to measure and compare magnetic attraction force between electromagnets? I'm showing two different electromagnets , one with twice the measured inductance of the other. I can demonstrate that the home made electromagnet with twice the inductance will drop two ceramic block magnets at the same spacing distance the electromagnet with half it's inductance will only drop one.

People grow skeptical about input. The input is fixed at 1500 ma at 12 volts through a 12 volt D.C. wall transformer. The electromagnet with half the inductance will draw the same power, and produce twice the waste heat as the electromagnet with double the inductance. The double the inductance electromagnet transforms the waste power into magnetic field attraction strength. That's the difference!

I'm setting up to perform this test. I need to buy a laser heat measurement instrument to insure accuracy.

What's the corollary? The electromagnet with twice the inductance will generate twice the electrical power from a magnet of equal strength and motion. I'll follow up with this test comparison in due course.

I went shopping and purchased a Model AR350 Non-contact infrared thermometer. I connected each coil to a 1000 ma 12 volt wall transformer, and measured the temperature of each coil every two minutes for a period of ten minutes. Each coil went up around one degree Fahrenheit every two minutes.

Let's say one coil is generating twice the magnetic attraction field as the other, what inference can we draw? It's probably safe to assume that they're drawing around the same power.

More tests to continue.