Description
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.
