This one actually functions like an old AM radio should. This short video may or may not play on your computer.
Let me know if you can view it (and hear it). I'm still trying to master this embedded video concept.
Next victim
This is an old Silvertone (Sears Roebuck) farmhouse radio, designed to be powered by two dry-cell batteries. Each of its five tubes uses only 1.4 volts.
Note the intricate tuning cable-and-pulley setup.