Tape Head Demagnetizer Cassette

This model charges up a capacitor to a pre-determined voltage and then dumps it into a demagnetizer oscillator using an SCR. The LED lights when finished:

Power to the circuit is activated by a microswitch when the tape head presses on the demagnetizer coils:

Safety, accuracy and completeness of information provided herein is not guaranteed,
so be inspired by it but do not use it as a basis for experimentation or other actions.

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