RF Combiner – Model D8803 – 4-Way In-Phase Connectorized Combiner covering the full 20-300 MHz band rated at 1750 W CW. RF Combiner – Model D8803 is designed for military and commercial applications and operates with less than 0.5 dB of Insertion Loss. The D8803 operates with better than 18 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.