Comet CF-530 High-Power Duplexer/Combiner-Splitter, 1.390 MHz & 125470 MHz, 600 W PEP, 45 dB Isolation, SO-239 & PL-259 Connectors

Description

• Combines or splits two device paths with extremely low insertion loss just 0.2 dB on 1.390 MHz and 0.3 dB on 125470 MHz for efficient RF routing.
• Handles up to 600 W PEP on both the low-band (1.390 MHz) and high-band (125470 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.

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 (1.390 MHz) and VHF/UHF (125470 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 devices 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.

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