In my experience, I always get much better Searx results by changing the language to the relevant one (and disable SafeSearch). However, between instances, it varies which search sources they include (Google, Bing, DDG etc.). After trying multiple, I’ve found a few instances that generally get me the results I’m looking for.

E.g. if searching for, let’s say, something German, my URL would contain this:

/search?q=cannabis+legal&language=de&safesearch=0

For local reception, receivers with RTL2832U chips are a cheap option. They are also called RTL-SDR. I have simply been using a long wire as a “random wire antenna”. Some of the older dongles also need an upconverter to be able to tune into low HF frequencies:

An upconverter for the RTL-SDR translates low HF frequencies ‘up’ into ones that are receivable by the RTL-SDR. This is a different method to the direct sampling mode used in the V3 dongles to achieve HF reception.

Quoted source: https://www.rtl-sdr.com/a-homebrew-one-transistor-upconverter-for-the-rtl-sdr/