The RCJ HF-VHF-UHF, high power jammer is designed to block FM communication. The system operates on a microprocessor for DDS programming, using mixed signals for maximum jamming efficiency. Each unique noise signal creates a “firewall” between the transmitter and receiver, and allows a selective jamming area through Broadband Directional Antennas that can be used with long wire and Omni directional antennas for 360° jamming.