## Technical Overview: 083-8SP-RFX The **083-8SP-RFX** is a high-performance **UHF (Ultra High Frequency) Jack Connector**, commonly known as a **SO-239** connector. It is manufactured by **Amphenol RF** and is designed specifically for coaxial cable terminations in radio frequency applications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Connector Type** | UHF Female Jack (SO-239) | | **Impedance** | Non-constant (typically ~50 Ohms) | | **Frequency Range** | 0 - 300 MHz | | **Mounting Type** | Panel Mount, 4-Hole Flange | | **Termination Style** | Solder Cup | | **Voltage Rating** | 500V Peak | | **Operating Temp** | -65°C to +165°C | --- ### 2. Physical Construction & Materials The "RFX" suffix in the part number often denotes Amphenol's commercial grade, which offers a balance between high performance and cost-effectiveness. * **Body Material:** Brass or Zinc alloy with **Nickel plating** for excellent corrosion resistance and durability. * **Contact Material:** Brass or Phosphor Bronze with **Silver or Gold plating** to ensure high conductivity and minimal signal loss. * **Insulator:** Typically **PTFE (Teflon)** or PBT. PTFE is preferred in the RFX line because it handles high heat during soldering and maintains stable electrical properties. * **Mechanical Interface:** Threaded coupling (5/8"-24 thread) which provides a secure, vibration-resistant connection. --- ### 3. Application Areas The 083-8SP-RFX is widely used in industries requiring reliable low-to-mid frequency RF transmissions: 1. **Amateur Radio (Ham Radio):** The standard connector for HF (High Frequency) transceivers and antennas. 2. **CB Radio:** Used in vehicle-mounted and base station citizens band setups. 3. **Marine Communication:** Utilized for VHF ship-to-shore communication systems. 4. **Public Address Systems:** Sometimes used for high-power audio or antenna distribution in low-frequency ranges. 5. **Test Equipment:** Found on the rear panels of older signal generators and wattmeters. --- ### 4. Implementation Note: Solder Cup Termination This part features a **Solder Cup** center contact. When installing: * The coaxial cable's center conductor is inserted into the cup and soldered. * The outer shield (braid) is typically clamped or soldered to the flange/body depending on the specific chassis mounting configuration. * **Caution:** Because this is a UHF connector, it is generally not recommended for applications exceeding **300-500 MHz** due to significant impedance discontinuities at higher frequencies.