Reading through them is fascinating. For example: https://www.worldradiohistory.com/Archive-Electrical-Experimenter/EE-1918-10.pdf https://www.worldradiohistor

Reading through them is fascinating. For example: https://www.worldradiohistory.com/Archive-Electrical-Experimenter/EE-1918-10.pdf https://www.worldradiohistory.com/Archive-Electrical-Experim...