Vintage 40's Ferret 721 test speaker repurpose Magic light box Son's Christmas gift light chaser

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Gadget Christmas gift! My son likes weird gadgets. He works on line and conducts many Zoom meetings. In the background of his office, he has strange items which catch the attention of his customers. So, I thought I'd make something strange that he could showcase. Here it is! A 1947 Ferret Model 721 speaker tester retrofitted into a wild controllable light box! I love the art work on this relic. Hopefully he likes it. I designed the light chaser board over 20 years ago. If you really want to build something like this, I can take the time to draw up a schematic. This is the one & only! Unless there's someone as crazy as me out there. Want to build one? Contact: d-labelectronics.com or