Abstract: There is provided a method of tuning an antenna after a transmitter is tuned using a dummy load by nulling a bridge having the antenna connected thereto and deriving energy from the transmitter coupled to the dummy load.The antenna circuit is connected as one arm of a bridge circuit and a double pole double throw switch selects tune and transmit positions where the dummy load and antenna are respectively connected to the transmitter.In the tuning position the transmitter is tuned while the antenna is effectively isolated so that it does not affect the transmitter tune up thereby simplifying and expediting tuning. The very small amount of power used to tune the antenna reduces the interference otherwise that would result from tune up of the antenna while connected to the transmitter. Thus, the antenna is tuned for a bridge circuit null indicating minimal standing waves before being connected to the transmitter for radio transmission.