Icom VHF and UHF 4-Cavity Internal RX Pre-Selector

Icom VHF and UHF Pre-Selector 4-Cavity Internal RX Pre-Selector Specialized RF Interference Mitigation for Digital Repeaters The Icom VHF and UHF Pre-Selector series is a critical hardware upgrade designed for high-performance repeaters operating in RF-congested environments. These internally mounted 4-cavity filters provide a narrow bandpass at the receiver’s front end, effectively stripping away unwanted out-of-band signals and interference before they can desensitize the radio’s receiver. By installing an Icom VHF and UHF Pre-Selector, network administrators can significantly improve receiver sensitivity and overall range in areas plagued by strong nearby transmitters, broadcast towers, or other collocated radio equipment. Each 4-cavity module is precision-engineered to maintain low insertion loss while providing steep attenuation of off-frequency noise. These pre-selectors are designed to be mounted internally, maintaining a clean and professional setup within the repeater chassis. Whether deploying a VHF or UHF system, the integration of an Icom VHF and UHF Pre-Selector ensures that your communication infrastructure delivers the maximum possible "clean" signal, which is essential for the high-integrity data and voice requirements of IDAS digital networks. Choose Your Purchasing Option IASPR1001 (VHF 136–150MHz): Optimized for lower VHF band operations. Requires assembly kit for installation in FR5300. IASPR1002 (VHF 150–174MHz): Optimized for higher VHF band operations. Requires assembly kit for installation in FR5300. IASPR1010 (UHF 400–440MHz): Optimized for UHF band operations. Requires assembly kit for installation in FR6300. Key Features & Benefits 4-Cavity Precision Filtering: Provides a highly selective bandpass to block off-frequency interference and improve signal-to-noise ratios. Enhanced Receiver Sensitivity: Prevents "receiver desense" caused by strong nearby signals, ensuring small portable radios are heard clearly over long distances. Internal Chassis Mounting: Specifically designed to fit within the Icom repeater housing for a streamlined and secure professional installation. Frequency-Specific Optimization: Available in three distinct bands to provide the exact filtering required for your specific license or coordination. Industrial Durability: Built with high-grade internal components to handle continuous-duty operation without thermal drift or performance degradation. Mission-Critical Reliability: Recommended for any site collocated with paging systems, broadcast FM, or other high-power RF sources. Specifications Feature Specification Filter Type 4-Cavity Bandpass Bands Available VHF (136-174MHz) / UHF (400-440MHz) Mounting Internal Insertion Loss Low (Optimized for RX) Compatibility Digital Repeaters (FR/CY Series) Compatibility FR5300 CY5300 FR6300 CY6300 What's Included Description SKU Status 4-Cavity Pre-Selector Module IASPR1001 / 1002 / 1010 ✅ Included Mounting Plate / Assembly Kit N/A ❌ Sold Separately Internal Coaxial Jumpers N/A ❌ Sold Separately Recommended Accessories Icom VHF Digital Repeater (FR5300) Icom UHF Digital Repeater (FR6300) Frequently Asked Questions Do I need an assembly kit for the FR5300 or FR6300? Yes. These pre-selectors require a specific mounting plate and assembly kit for proper physical and electrical installation within the repeater chassis. Can I tune these myself? These are precision-tuned instruments. While they can be adjusted, we highly recommend having them tuned with a professional network analyzer to ensure the narrow bandpass is perfectly aligned with your frequencies. Will this help with lightning protection? No. While it filters RF signals, it is not a surge suppressor. We always recommend external lightning arrestors for antenna feedlines. Warranty 1-year manufacturer's warranty.