4O3A 1A2R Radio Switches

4O3A 1A2R Radio Switch – Intelligent Amplifier Sharing for Dual-Radio Stations

The 4O3A 1A2R Radio Switch is engineered to allow a single amplifier to be safely shared between two radios, making it an ideal solution for SO2R (Single Operator Two Radios) contesting or multi-radio station setups. It uses a “first PTT wins” logic, ensuring that only one radio can access the amplifier at a time, preventing signal conflicts and potential equipment damage. Each radio’s PTT control can be independently disabled via a dedicated switch, offering added flexibility during operation. Once installed, the switch eliminates the need for manual rewiring—your amplifier remains permanently connected and ready. In the event of a failure during SO2R operation, the amplifier can be quickly reassigned from Radio B to Radio A, providing a reliable backup path.

Key Features:

Amplifier Sharing: Enables one amplifier to be safely shared between two radios, with automatic switching logic.

High Isolation: Provides excellent RF isolation between ports to prevent cross-interference and protect equipment.

Failover Capability: Allows manual reassignment of the amplifier in case of radio failure during SO2R operation.

Flexible Connectivity: Available with SO-239 or Type-N RF connectors and RCA jacks for PTT input.

Additional Features and Specifications:

• Function: 1 amplifier to 2 radios switch

• Use Case: SO2R contesting, multi-radio stations

• Switching Logic: First PTT wins

• PTT Control: Independent disable switches for each radio

• RF Input/output Connectors: UHF SO-239 female

• PTT Input/Output: RCA jacks

• Power Handling: 3,000W PEP

• Isolation Between Ports: Up to 70dB at 30MHz

• Dimensions (WxHxD): 5.118 x 6.300 x 3.543in. (13 x 16 x 9cm)

• Weight: 2.20lbs. (1.0kg)