Hello,

The FM snake is a very basic crystal radio using a Light Emitting Diode as the
detector. No audio could be heard if headphones ( high impedance! ) were used
as the mode being detected is FM, where there is no amplitude variation on
it's carrier. Basically, someone " re-discovered " the crystal radio from 1905
or so.

In my Technician classes, I use exactly the same circuit, with a 2 meter
mobile for my RF source. but with wires resonant in the 2 meter band to
demonstrate the pattern of simple 4 element 2 meter Yagis.

Sam Neal N5AF
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