A simple but efficient way to easily control a Magnetic Loop Antenna. The heart of the controller is the ESP32 microcontroller. A closed loop stepper driver is used to drive a stepper motor to rotate either a butterfly, or vacuum variable capacitor. A rotary encoder is used to manually tune the capacitor but when auto tune is selected from the Main Menu, full automatic tuning is achieved by keying the transmitter and pushing the "tune" push button. The ILI9341 2.8" 240x320 Touch display is used to control all functions of the controller. Note: This controller does not require any specific cables to interface to a radio, as such it will work with any radio right out of the box.