Aspidistra (transmitter)

An aspidistra (transmitter) is a device that sends out radio waves to broadcast a signal. Usually, it is used to send out a radio signal from a radio station so that people can listen to the radio. Inside it, there are lots of electrical parts like wires and tubes that work together to send out the signal at a certain frequency. It is like a big speaker that sends out sound, but instead of sound, it sends out a radio signal.