Abstract: The transmission of amplitude modulated stereo is achieved by modulating the positive and negative half cycles of a radio frequency carrier separately with a different one of the channels carrying the audio intelligence of a stereo program, thereby transmitting both stereo channels on the same carrier. The modulation is done after final amplification of the carrier signal, directly in the antenna circuit, in order to eliminate mixing of the two channels, and is achieved by utilizing each half cycle of radio frequency antenna current to activate separate modulators each connected to a different one of the sources of audio frequency intelligence signals. Reception of this transmission is achieved by inserting a radio frequency diode in the resonant circuit of each of two receiving antennas in opposite directions, whereby each antenna circuit is responsive only to a different one of the two channels.