Adapter SMA-G / UHF-G coaxial connector coupling, No name, model SMA-G/UHF-G

The adapter SMA-G / UHF-G coaxial connector coupling (No name, model SMA-G/UHF-G) is a compact mechanical and electrical interface designed to convert between SMA-G and UHF-G (PL259/SO-239 style) connector types. It enables connection of coaxial cables and devices that use different connector standards without modifying cable assemblies. The adapter is suitable for use in radio, antenna, and test equipment setups where reliable physical mating and signal continuity are required.

Advantages

This SMA-G to UHF-G coupling provides a straightforward and reversible connection between two common coaxial connector families. Its small form factor preserves space in tight installations, while the threaded SMA interface and the larger UHF threaded socket ensure a secure mechanical fit. The adapter maintains signal path continuity and allows users to reuse existing cables and equipment when changing connector types.

Suitable for

• Amateur radio transceivers and antennas
• Field and bench test equipment requiring different connector types
• Temporary or permanent antenna installations
• Adapters between measurement instruments and lead assemblies

Key specifications

• Connector conversion: SMA-G to UHF-G (PL259/SO-239 style)
• Interface types: threaded SMA on one side, UHF socket on the other
• Material: metal body for mechanical durability and shielding
• Typical use frequency: suitable for VHF/UHF amateur and general RF applications (subject to connector and cable limitations)
• Form factor: compact inline coupling

How to use

To use the adapter, align the SMA male/female connector of the cable or device with the SMA side of the adapter and carefully screw it in until finger-tight, avoiding over-torquing. On the UHF side, mate the PL259 or SO-239 style connector by aligning the center pin and threading the outer coupling nut until secure. Verify mechanical tightness and visual alignment to ensure proper contact. For test setups, confirm signal continuity and expected readings after installation.

Usage recommendations

Use the adapter within the mechanical and frequency limits of the connected connectors and cables. Avoid excessive torque when tightening to prevent damage to the SMA threads or UHF coupling. For applications where low loss or precise impedance matching is critical, consider using purpose-built cables or adapters specified for the required frequency range and return loss.