Walkman equipped with wireless repeater circuit

Adding wireless repeaters to walkman is especially suitable for students. In the same dormitory or several adjacent dormitories, if a student's walkman is equipped with a wireless repeater, many students can listen to the music played by that student on the radio. If several students' walkmans are equipped with wireless repeaters, it is equivalent to adding several small radio stations that can move freely.
This repeater works stably, and its oscillation frequency can be set through C3, but it is important to select the local frequency not to be the same as the radio frequency of local or other regions, so as not to interfere with others' listening.
The coil can be wound 10 times on the 3mm framework with Φ 0.5mm enameled wire, and the intermediate tap is connected at three turns. The antenna can be equipped with a rod antenna according to the size of the walkman. The switch can be installed on the housing with a sliding switch. In order not to affect the operation, the power supply can use a 1.5-3V button battery. After selecting the placement point of the transponder, connect the signal input end of the transponder to the headphone output end of the walkman.

Continuous