Comet CF-530 High-Power Duplexer/Combiner-Splitter, 1.3–90 MHz & 125–470 MHz, 600 W PEP, 45 dB Isolation, SO-239 & PL-259 Connectors

The Comet CF-530 Duplexer is a premium-grade RF component tailored for amateur device operators and RF professionals who need to efficiently manage two disparate frequency bands through a shared transmission line. This duplexer enables simultaneous operation by combining or splitting signals between HF/6 m (1.3–90 MHz) and VHF/UHF (125–470 MHz) with outstanding performance. Thanks to high-quality internal filtering, the CF-530 maintains very low insertion loss — just 0.2 dB on the lower band and approximately 0.3 dB on the upper band — ensuring that transmitted power is preserved and signal degradation is minimized. Engineered for high-power use, the CF-530 supports up to 600 W PEP on both frequency ranges, making it robust enough for demanding base stations, mobile setups, or repeater sites. The device also offers excellent isolation — a minimum of 45 dB — between its two ports, which minimizes interference and cross-talk when routing signals through a single coax. This high isolation is critical when combining two transmissions or splitting a single device’s output to dual antennas, as it helps prevent TVI (television interference) and ensures cleaner, more reliable operation. Connector reliability is built in: the common port uses a standard SO-239 female connector, while the low-pass and high-pass ports each use PL-259 male leads. This connector configuration is widely supported in amateur device setups, simplifying installation and compatibility. The compact, rugged mechanical design (approximately 66 mm × 90 mm × 26 mm, ~325 g) fits easily in device shacks, on tower bases, or within mobile installations. Thanks to its dual-use flexibility, the CF-530 can serve as a combiner — merging two devices into one shared antenna — or as a splitter — distributing a single transceiver's signal across two separate antennas. In circumstances where only one band is used, the unused port can remain open, though best practice is to use a dummy load on the unused connector to improve performance and prevent potential impedance issues. With its solid build, high power handling, and excellent RF characteristics, the Comet CF-530 is an optimal choice for serious device setups demanding reliable duplex performance.

• Combines or splits two device paths with extremely low insertion loss — just 0.2 dB on 1.3–90 MHz and ≤ 0.3 dB on 125–470 MHz — for efficient RF routing.
• Handles up to 600 W PEP on both the low-band (1.3–90 MHz) and high-band (125–470 MHz), making it suitable for high-power amateur, mobile, or base installations.
• Excellent isolation of at least 45 dB between the low-pass and high-pass ports ensures minimal cross-interference and strong TX/RX separation.
• Durable, standard RF connectors — a common SO-239 input and two PL-259 output leads — make it compatible with typical coaxial systems and easy to integrate.
• Flexibly configured for duplex use: ideal for combining HF or 6 m with 2 m/70 cm radios into one antenna feed, or splitting a single radio across dual antennas.