Archive for January, 2010

Primitive Radio Gods

Crysyal #1

It has been about 40 years since I have built a radio circuit.  I started to work on a crystal radio recently with the goal of housing it in an Altoids tin.   The sine qua non of this circuit is the wonderfully retro 1N34A germanium diode.  I am still amazed at how little it takes to pull in a radio signal and that it all can be done using only the energy contained in the signal itself.