Listening to Al Gross W8PAL interviewed in 1991 on the "Ham Radio and More" show discussing the history of ham radio. He starts with his memory of building a crystal radio in 1930 and hearing 160m hams. https://archive.org/details/hamradioandmore_1991-08-04 #DLARC
He was licensed in 1933, and by 1938: "I discovered that my great interest was to be able to build things that you could carry with you that would be portable - I enjoyed taking things out and taking batteries along with me to a park and being able to operate portable." Well look at that #pota in the 1930s! #DLARC