{"product_id":"comet-cf-503c-duplexer","title":"Comet CF-503C Duplexer 1.3-90\/125-470MHz, 600W, PL 259","description":"\u003ch2\u003eHF and VHF\/UHF Duplexer with Direct-Mount PL-259 Input\u003c\/h2\u003e\u003cp\u003eThe Comet CF-503C is a high-power duplexer for simultaneous transmission and reception across HF\/6m (1.3–90MHz) and VHF\/UHF (125–470MHz), covering 2m and 70cm in a single compact unit. Unlike most duplexers in the Comet range, the CF-503C features a PL-259 plug input fitted directly to the body of the duplexer, with two SO-239 socket outputs — making it ideal for installations where the transceiver end uses a PL-259 terminated feedline. More than 45dB of isolation between ports ensures clean band separation. The unused port can remain open, though terminating with a dummy load is recommended.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSimultaneous dual-band operation: 1.3–90MHz and 125–470MHz\u003c\/li\u003e\n\u003cli\u003eCovers HF, 6m, 2m, and 70cm in a single unit\u003c\/li\u003e\n\u003cli\u003e45dB+ isolation between ports\u003c\/li\u003e\n\u003cli\u003eFlat 600W PEP power rating across all frequency ranges\u003c\/li\u003e\n\u003cli\u003eLow insertion loss: \u0026lt;0.15dB (LPF) and \u0026lt;0.2dB (HPF)\u003c\/li\u003e\n\u003cli\u003e50 Ohm impedance, VSWR \u0026lt;1:1.2\u003c\/li\u003e\n\u003cli\u003eInput: PL-259 plug (direct mount) | Outputs: 2× SO-239 sockets (direct mount)\u003c\/li\u003e\n\u003cli\u003eCompact form factor: 66 × 90 × 26mm, 300g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBandPass Frequency \u0026amp; Input Loss: 1.3–90MHz \/ Less than 0.15dB\u003c\/li\u003e\n\u003cli\u003eBandPass Frequency \u0026amp; Input Loss: 125–470MHz \/ Less than 0.2dB\u003c\/li\u003e\n\u003cli\u003eImpedance: 50 Ohms\u003c\/li\u003e\n\u003cli\u003eVSWR: Less than 1:1.2\u003c\/li\u003e\n\u003cli\u003eMaximum Input Power: 1.3–470MHz \/ 600W (PEP)\u003c\/li\u003e\n\u003cli\u003eIsolation: More than 45dB\u003c\/li\u003e\n\u003cli\u003eInput: 1× PL-259 Plug (fitted direct to duplexer)\u003c\/li\u003e\n\u003cli\u003eOutput: 2× SO-239 Sockets (fitted direct to duplexer)\u003c\/li\u003e\n\u003cli\u003eDimensions: W66 × D90 × H26mm\u003c\/li\u003e\n\u003cli\u003eWeight: 300g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Comet","offers":[{"title":"Default Title","offer_id":57666756510040,"sku":"MOON-18-652","price":49.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/8753\/5192\/files\/cf503c.png?v=1783505644","url":"https:\/\/kamsat.co.uk\/products\/comet-cf-503c-duplexer","provider":"Kamsat","version":"1.0","type":"link"}