HX108-2 in Germany | with Component Tests (Transistor Level AM Radio Kit)
A medium wave 5$ AM radio kit from aliexpress.com.
It uses no ICs, just transistors.
It's hard to build, but it works even in Germany where there are no stations.
You can hear foreign stations after dark.
This video shows transistor and transformer tests with a component tester.
I give some tips to build it in this video but I advise you to use other youtube videos that explain how to build it.
Unfortunately I couldn't translate the chinese instructions.
1:23 Big coil of the ferrite antenna is 0.63mH.