Motorola SLR5500 VHF Repeater Kit (Antenna, Duplexer, Cables, Surge Protector)

The Motorola SLR5500 VHF Repeater Kit (Antenna, Duplexer, Cables, Surge Protector) is a complete technical solution designed for deploying or upgrading a stationary radio communications node in the VHF frequency band (136–174 MHz). The set is engineered to ensure seamless 24/7 operation of the Motorola SLR5500 repeater, minimizing coaxial signal loss and shielding sensitive transceiver equipment from high-voltage surges caused by lightning discharges.

🫡 We Are a Team of Veterans

We view the Motorola SLR5500 VHF Repeater Kit (Antenna, Duplexer, Cables, Surge Protector) as a dependable foundation for establishing reliable radio coverage across extensive areas or complex terrain. All kit components are fully impedance-matched, frequency-aligned, and power-rated, eliminating the need to source compatible adapters, duplex filters, or low-loss cable assemblies separately. The inclusion of a surge suppressor and a high-performance duplexer allows a single antenna to be shared for simultaneous transmission and reception, significantly simplifying tower installation and boosting overall system resilience.

⚙️ Technical Specifications

Parameter	Value
Compatible Equipment	Motorola SLR5500 VHF Repeater
Operating Frequency Band	VHF (136–174 MHz)
Antenna System Configuration	Single antenna-feeder path for RX/TX (via duplexer)
Duplexer Type	Band-Reject / Bandpass
Channel Isolation	≥ 75–80 dB
Insertion Loss	≤ 1.5 dB
System Impedance	50 Ohms
Coaxial Cable Type	Low-Loss Feeder Cable
Connectors	High-grade N-type (and/or BNC/Mini-UHF depending on ports)
Surge Protection Module	Gas Tube Arrester, inline pass-through type
Operating Temperature Range	−30°C to +60°C

Commentary / Comments

The primary advantage provided by the Motorola SLR5500 VHF Repeater Kit (Antenna, Duplexer, Cables, Surge Protector) is its high level of isolation between receive and transmit paths, preventing receiver desensitization caused by the repeater's own transmitter output. Deploying a precision duplexer saves valuable vertical mounting space on towers or masts, as a single high-gain omnidirectional antenna replaces two spatially separated antennas.

The ultra-low-loss feeder cable ensures maximum RF power transfer from the repeater to the antenna while maintaining high reception sensitivity for low-power handheld radios. The included gas-discharge surge protector shields the front-end circuitry of the Motorola SLR5500 against static accumulation and induced high-voltage transients, guaranteeing uninterrupted operational readiness during thunderstorms.

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Motorola SLR5500 VHF Repeater Kit (Antenna, Duplexer, Cables, Surge Protector)

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