My brother in law is a ham too.
Over the holiday, I spent some time with my brother in law. His is a ham too. He showed me his new Yaesu transceiver and we were listening to 7200 kHz on the 40 meter band. Lots of weirdness on there.
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Amateur Extra Next
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My current plan is to take the test for Amateur Extra before June 30th, 2024, less than two months away. I've been doing practice tests. Ham Radio Prep has a good study product for all of the exams, but it is not free. hamexam.org offers practice tests online for free. There are free Android apps called HamRadioExam by Roy Watson, N1ZTL . There are numerous other sites which require creating a login, such as ARRL Exam Review . The biggest challenge is the math.
A radio without a battery
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When I was about 10 years old, I had a Radio Shack electronics kit. It was a limited model, instead of the solid block with spring connectors, it was a bunch of blocks with spring connectors. It was a bit easier to work with, but like most of those 100-in-1 kits could get complicated. My dad and I build the crystal radio. It used a weird little ear piece; I couldn't understand why at the time. For some reason, I had a long spool of two conductor phone wire. It wasn't the conventional color, I think it was blue and yellow stripe or something similar. We rolled that wire all through the house through the den, kitchen and living room. It was magic to listen through that tiny ear pice and hear a local radio station. How that could work without a battery was so mysterious.