The **31-9-RFX** is a specific model of a **BNC Bulkhead Jack Receptacle** manufactured by Amphenol RF. It is a radio frequency (RF) connector designed for panel mounting, providing a secure interface between internal wiring and external BNC cables. --- ### 1. Technical Specifications The following table outlines the primary electrical and mechanical characteristics of the 31-9-RFX: | Property | Specification | | :--- | :--- | | **Connector Type** | BNC Female (Jack) | | **Body Style** | Straight Bulkhead | | **Impedance** | 50 Ohm | | **Frequency (Max)** | 4 GHz | | **Termination Style** | Solder Cup | | **Mounting Type** | Front Mount (with Nut and Washer) | | **Voltage Rating** | 500V Peak | | **Dielectric Type** | Delrin / PTFE | --- ### 2. Key Components and Materials The 31-9-RFX is built using materials optimized for conductivity and durability in RF environments: * **Body Material:** Brass with Nickel plating for corrosion resistance and durability. * **Contact Material:** Phosphor Bronze or Brass, typically finished with Gold plating to ensure low contact resistance and prevent oxidation. * **Insulator:** High-quality plastic (often Delrin), which maintains the 50-ohm impedance and provides electrical isolation between the center pin and the outer shell. * **Hardware:** Includes a hex nut and a lock washer to secure the connector to a chassis or panel. --- ### 3. Common Applications Because of its "Bulkhead" design, this part is used to pass a signal through a physical barrier (like a metal wall). Common use cases include: 1. **Test Equipment:** Oscilloscopes, signal generators, and spectrum analyzers. 2. **Antenna Connections:** Passing an RF signal from inside a shielded enclosure to an external antenna. 3. **Industrial Controls:** Used in rack-mounted systems where external BNC patching is required. 4. **Video/Broadcast:** Standard 50-ohm video signal routing (though 75-ohm is more common for high-end digital video, 50-ohm is standard for many legacy and RF systems). --- ### 4. Installation Overview The **31-9-RFX** features a "Solder Cup" termination. This means: * The center conductor of your internal wire is soldered into a small cup on the back of the connector. * The outer shield (ground) is typically soldered to a ground lug or clamped to the chassis via the bulkhead mounting process.