Comet CSW-201G

Comet CSW-201G Professional Coaxial Switch: Technical Specifications and Features The Comet CSW-201G is a professional 2-position coaxial switch designed for wideband operation from DC to 600 MHz, ideal for amateur radio stations, HF/VHF/UHF base stations, and installations requiring fast switching between two antennas or two coaxial loads on a single transceiver. Featuring gold-plated SO-239 connectors (PL-259 compatible), the CSW-201G ensures a stable, low-contact-resistance connection with long-term corrosion resistance — maintaining RF performance even in demanding environments or after years of continuous use. RF Performance: Low Insertion Loss and High Power Handling The Comet CSW-201G is engineered to minimize losses in the RF path and maintain full signal integrity under all operating conditions. Insertion loss below 0.12 dB and an SWR below 1.2 make it virtually transparent to the transmission line, with no measurable impact on transmitted or received signals. Isolation greater than 60 dB between the two output ports ensures that the signal applied to one port does not affect the other — a critical requirement in installations with multiple closely spaced antennas or simultaneous receive configurations. The unselected port is automatically short-circuited, eliminating unwanted reflections and protecting the system during high-power transmit operations. Technical Specifications Model Comet CSW-201G Frequency Range DC – 600 MHz Connectors SO-239 (PL-259) with gold-plated contacts Insertion Loss < 0.12 dB SWR (Standing Wave Ratio) < 1.2 Isolation > 60 dB Impedance 50 Ω Max. Power DC–30 MHz 1500 W PEP Max. Power 30–150 MHz 1000 W PEP Max. Power 150–600 MHz 500 W PEP Dimensions 72 × 78 × 47 mm Weight 430 g Unselected Port Automatically short-circuited Applications: When to Use the Comet CSW-201G The CSW-201G is the ideal solution for amateur radio operators and professional users who need to switch between two coaxial antennas without physically disconnecting cables. It is particularly suited for setups featuring dipoles, vertical antennas, beam antennas, or wire antennas connected to HF, VHF, or UHF transceivers running up to 1500 W PEP in the HF band. Its compact form factor — 72 × 78 × 47 mm at 430 grams — allows installation in both fixed and portable or contest stations, without excessive bulk in the rack or on the operating desk. Comet Build Quality: Long-Term Reliability Comet is a Japanese reference brand in the field of antennas and RF accessories for amateur radio. The CSW-201G is built to the quality standards that define Comet's manufacturing: robust metal housing, gold-plated contacts for durability and corrosion resistance, and verifiable RF specifications that guarantee the stated performance across the full operating frequency range.