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For the term "which is the resonance with cuurent amplification".

Magnetic Resonance Amplifier 4: Ferrite Core Without Magnets

Please watch the first three videos first. Schematics and further explanations are found in them. Here I’ve made another transformer using half of a TV CRT horizontal deflection yoke ferrite. I wound it with…

Magnetic Resonance Amplifier 3: Capacitor Instead Of Piezo Element

Please watch the first two videos first. Here I take the Piezo element out of the circuit and replace it with a capacitor of similar value. The circuit behaves nearly the same as before…

Magnetic Resonance Amplifier: Supplement: Piezo Element, LED Flashes

Here’s a neat thing I discovered about these little piezo buzzer elements. I knew they would flash the LED, but evidently they also somehow hold enough charge so that they are able to flash…