This small transmitter was found in a Electronic Experimenter Magazine published in 1950. The circuit can send radio signals in the MW range to distances up to 100 meters. The coil is formed by 30 + 100 turns of 28 or 230 AWG wire in a ferrite core.

This small transmitter was found in a Electronic Experimenter Magazine published in 1950. The circuit can send radio signals in the MW range to distances up to 100 meters. The coil is formed by 30 + 100 turns of 28 or 230 AWG wire in a ferrite core.