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Theory Of Simplex And Phantom Circuits - Part I - Balanced Conditions

Theory Of Simplex And Phantom Circuits - Part I - Balanced Conditions

Do It Yourself Electronics

8 months
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This is an old B&W film about how telephone and telegraph circuits work to carry multiple signals over just two or three wires. I find it really awesome how transformers work as filters, only allowing certain signals to pass through the wires based on the coil windings. I never get over how amazing coils and transformers are.

I hope someone else out there enjoys this old video as much as I do.

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