Icom VHF Internal Duplexers 5MHz SeparationIcom VHF Internal Duplexers 5MHz Separation IASDUP1004 IASDUP1005 IASDUP1006 50W Internal VHF Duplexers Compact Single Antenna Solutions for VHF Repeaters The Icom IASDUP1004 05 06 series consists of professional grade 6 cavity internal duplexers engineered for high performance VHF repeater systems. These specialized RF components allow a repeater to transmit and receive simultaneously through a single antenna port, eliminating the need for dual

Icom VHF Internal Duplexers 5MHz Separation

IASDUP1004 / IASDUP1005 / IASDUP1006

50W Internal VHF Duplexers

Compact Single-Antenna Solutions for VHF Repeaters

The Icom IASDUP1004/05/06 series consists of professional-grade 6-cavity internal duplexers engineered for high-performance VHF repeater systems. These specialized RF components allow a repeater to transmit and receive simultaneously through a single antenna port, eliminating the need for dual antennas or bulky external hardware. Specifically designed for a factory-style fit within the chassis of the FR5000 and CY5300 series, these duplexers provide a clean, integrated solution for space-constrained rack environments and mobile command centers.

With a power rating of 50 Watts and a high-selectivity 6-cavity design, these units provide excellent isolation between the transmit and receive paths, preventing receiver desensitization and ensuring crisp audio quality. Each variant is optimized for a specific segment of the VHF band, providing reliable coverage across amateur, commercial, and public safety frequencies. With a standard 5MHz TX-RX separation, these duplexers offer a versatile and efficient migration path for single-site or networked repeater systems.

Key Features & Benefits

• Internal Chassis Integration: Tailored to fit directly inside the repeater housing, protecting the RF signal path and saving valuable 19-inch rack space.
• Single Antenna Efficiency: Enables full-duplex operation on one antenna, significantly reducing tower equipment costs and installation complexity.
• High-Isolation 6-Cavity Design: Provides superior rejection of transmitter noise to maintain maximum receiver sensitivity in congested RF environments.
• Vibration-Resistant Build: Rugged construction ensures stable frequency performance in both fixed station and transportable deployments.
• Broad VHF Coverage: Multiple variants available to cover the full VHF spectrum from 136MHz up to 174MHz.
• Low Insertion Loss: Engineered to maintain maximum signal strength for both incoming and outgoing transmissions.

Specifications

• Brand: Icom
• Configuration: 6-Cavity
• Connector Type: N-Connector
• Application: Internal Repeater Mounting
• Compatible Chassis: FR5300, CY5000

Variant Compatibility Guide

Frequently Asked Questions

• Are these duplexers pre-tuned? No. Duplexers must be tuned to your specific FCC-assigned TX and RX frequencies. It is recommended that a qualified technician perform the tuning using a calibrated network analyzer before installation.
• Can these handle a different frequency spread? While optimized for 5MHz, these variants are suitable for systems with a 4.2MHz to 6MHz TX-RX separation.

Warranty

1-year manufacturer's warranty.