Last updated: November 18, 2011
Under construction
Receiver first version
Prototype
Original circuit from
"Radio Bulletin november 1970, page 455"
Redrawn circuit
Coil: 28 turns on 32 mm PVC tube with tap at 4 turns from ground.
Varco: to be determined ;-)
The antenna is a short wire connected to the top of the coil,
or a longer wire attached to a few turns around the cold end of the coil.
Receiver second version
LF amplifier
Transmitter
Power Supply
Archive containing the Xcircuit file (encapsulated postscript).
