Comet CFX-431 Triplexer 1.3-150 MHz, 400-450 MHz and 900-1400 MHZ Great for use with an Icom IC-9700 and a discone antenna. The Comet CFX-431 Triplexer is a high-quality device designed for ham radio enthusiasts looking to expand their communication capabilities. Manufactured by Comet, a trusted brand in the industry, this triplexer offers a compact and efficient solution for combining multiple frequencies in a single system. Perfect for those looking to enhance their ham radio transceiver with a reliable and reputable product.