Genuine Icom Low Split RF-A Unit Board for IC-F4261 Series Digital Radios
This is a genuine Icom RF-A unit board assembly designed for the IC-F4261DT and IC-F4261DS digital two-way radios. This is the low split frequency configuration variant, compatible with both #01 and #05 frequency band designations. The green PCB features a complex RF circuit layout with multiple copper-ringed mounting holes, surface-mount components including inductors (visible green coils), a prominent integrated circuit marked "FCD7W4US2B", a copper wound inductor coil, various resistors, capacitors, connectors, and a blue trimmer adjustment component. This board handles critical radio frequency functions for the lower portion of the radio's operating frequency range.
Key Features
- Genuine Icom replacement RF-A unit board for IC-F4261DS/DT radios
- Low split frequency range configuration
- Compatible with frequency band designations #01 and #05
- High-density RF circuit design with surface-mount components
- Visible components include FCD7W4US2B IC, green wound inductors, and copper coil
- Blue trimmer capacitor for precise frequency adjustment
- Copper-reinforced mounting holes for secure installation
- Multiple connection points for integration with main radio circuits
- Factory-aligned and tested to Icom specifications
Compatible Models
- Icom IC-F4261DT Digital UHF Two-Way Radio
- Icom IC-F4261DS Digital UHF Two-Way Radio
What's Included
- One (1) Complete RF-A Unit Board Assembly
Application & Installation
This RF-A unit board is a highly specialized RF component that requires professional installation by a qualified Icom technician or authorized service center. The board is responsible for critical frequency generation, signal processing, and RF amplification functions within the specified low split frequency range. Replacement is necessary when the radio experiences frequency-specific transmit or receive failures, reduced performance in certain frequency bands, inability to tune properly, or other RF-related issues affecting the low split frequency range. Installation involves complete radio disassembly, careful removal of the failed board, installation of the new unit with proper orientation and connector engagement, and securing all mounting points. After installation, the radio requires comprehensive alignment procedures using specialized RF test equipment including spectrum analyzers, power meters, frequency counters, and deviation meters. The blue trimmer component visible on the board is used during alignment to fine-tune frequency response. This is strictly a professional-level repair that demands expertise in RF circuits, proper test equipment, and access to Icom service documentation. Improper installation or failure to perform post-installation alignment will result in radios that operate out of specification, potentially violating FCC regulations or failing to communicate properly within the radio system.
Manufacturer Part Number: 98416611
Board Type: RF-A Unit, Low Split Configuration
Compatible Frequency Bands: #01, #05
Visible IC Marking: FCD7W4US2B
