Let's see if this very old electronic device still works today, it's 80+ years old! For links, click the SHOW MORE tab below. To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: https://www.patreon.com/MrCarlsonsLab #learnelectronics #restoration #repair