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Can you say “Roosevelt baby”? My first set was a kit where I had to wind the coil on a cardboard tube, sand a strip along the top, and tune it with a metal slider. I was about 7 yrs. old and this was before I discovered, by experiment, that it is not a good idea to put metal things into wall outlets.
The detector (coherer) was a galena crystal embedded in a lead slug. Those who had these remember spending a lot of time with the “cat whisker” to find the “sweet spot”, but once found the rewards were great.
It came with a rather low grade earphone, but my cousin was an Air Force pilot and he gave me a set of phones which were so sensitive that if you touched one of the leads, you could hear the 60 cycle hum (remember Roosevelt babies talk cycles).
It worked really well, but I don’t remember what I used for an aerial.
Thanks for bringing this topic to the thread and allowing me to remember some good times.