RF Combiner – Model D6253 – 2-Way In-Phase Connectorized Combiner covering the full 20-500 MHz band rated at 25 W CW. RF Combiner – Model D6253 is designed for military and commercial applications and operates with less than 0.5 dB of Insertion Loss. The D6253 operates with better than 25 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.