The range for this transmitter is up to 100 m. The signal can be received by any circuit tuned for the same frequency and applied to filters or decoders to trigger a load. For 27 MHz operation the coil is formed by 7 turns of 26 AWG wire in a form with 1 cm of diameter. The antenna is a piece of wire 30 to 80 cm long plugged to the CT.
Tone Modulated Radio Control Transmitter
