April 9, 2020
1920s Art Deco Speaker
This week I received an old Art Deco extension speaker, I don’t have a make or a model for it, so can’t date it, but guessing from the moving iron driver design below, and the paper cone that was attached to it, I’m guessing 1920s. It was unfortunately open circuit (faulty) so wasn’t going to be any more than a desk ornament unless I took a look inside. So that’s what I did. I was lucky, it contained two electromagnets in series and with a quick test I was able […]