RF Combiner – Model D5489 – 4-Way In-Phase Connectorized Combiner covering the full 18-115 MHz band rated at 3000 W CW. RF Combiner – Model D5489 is designed for military and commercial applications and operates with less than 0.3 dB of Insertion Loss. The D5489 operates with better than 20 dB Isolation. Choose your specific connector configurations from a list of options. Additional connector configurations for our RF Combiners and RF Dividers, Non-Coherent Combiners and N-Way Combiners are available upon request.