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For the term "dr lirpa sloof transistor".

Joule Thief: Variations… Alternate Toroid, Reversed Transistor Comparisons

After the last video with the serendipitous wiring error, I decided to make an easily configured testbed and try some variations. Interesting….. I tried the generic 2n3904 type, reversed and correct, the metal-can 2n2222a…