Lectrosonics 21770 Coaxial Antenna Adapter Male SMA to Female BNC

The Lectrosonics 21770 is a coaxial antenna adapter designed for RF technicians and wireless system integrators who need to bridge BNC and SMA connector ecosystems without compromising signal path integrity. It accepts any antenna terminated with a male BNC connector and adapts it to a female SMA jack, making it a practical solution for connecting external antennas, active antenna combiners, or distribution systems to Lectrosonics wireless receivers and other equipment with SMA inputs.

In live production, broadcast, and installed audio environments, connector mismatches between antennas and receiver front ends are a common friction point. Rather than sourcing custom cables or compromising antenna placement, this adapter provides a direct, low-profile solution that keeps RF infrastructure clean and modular. Its utility extends to any scenario where BNC-terminated antenna infrastructure must interface with SMA-equipped receivers, including touring wireless rigs, broadcast carts, and fixed install racks.