DIY Bulk Eraser

Hi! i need to erase several tapes i have in my house, and it seems the best way to do it is with a bulk eraser. here in my country there's not even one on sale online, so i want to make my own. i've been reading everything i could find, and i got a E-I type transformer as the power source. any

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How to Bulk Erase Cassettes Radio Shack Video/Audio Tape Eraser 44-233A

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