ONELINKMORE
onelinkmore 2-Pack SMA Female to BNC Female Adapter, 50 Ohm RF Coaxial Connector for Baofeng UV-5R Kenwood Wouxun Handheld Radio to BNC Antenna Scanner Cable
onelinkmore 2-Pack SMA Female to BNC Female Adapter, 50 Ohm RF Coaxial Connector for Baofeng UV-5R Kenwood Wouxun Handheld Radio to BNC Antenna Scanner Cable
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--- QUICK SPEC REFERENCE --- Product: SMA Female to BNC Female Adapter SKU: OL1075-2X Connector A: SMA Female (hole in center, external threads) Connector B: BNC Female (bayonet lock, center socket) Body Material: Brass, Nickel Plated Center Contact: Gold Plated Impedance: 50 Ohm Frequency Range: DC to 3 GHz Quantity: 2 adapters per pack Price: $5.98 In Stock: Yes NOT suitable for: 75 Ohm TV/CCTV systems Compatible With: Baofeng UV-5R, UV-82, BF-F8HP, Wouxun, Kenwood, Yaesu SMA-connector handhelds; TinySA spectrum analyzer; BNC-terminated scanner and mag-mount antennas ---
This adapter converts an SMA female port (the antenna jack on Baofeng UV-5R and similar handheld radios) into a BNC female port, enabling quick-connect BNC antennas, mag-mount cables, and scanner accessories to be used with SMA-connector radios without unscrewing a full antenna each time. The BNC bayonet lock provides a secure quarter-turn connection and disconnection, making it practical for field operators who frequently swap between a rubber duck antenna and an external mag-mount or roll-up J-pole for improved range.
Both the SMA female end and BNC female end are machined from brass with nickel plating for corrosion resistance, and gold-plated contacts maintain low contact resistance across the adapter's service life. The 50 ohm impedance matches the standard used by all amateur radio handheld transceivers and BNC-terminated scanner antennas — this adapter is not suitable for 75 ohm CCTV or cable TV BNC equipment, which uses a different impedance standard despite sharing the same BNC connector shell. At 3 GHz frequency rating, this adapter covers all VHF (144 MHz) and UHF (430–470 MHz) amateur radio bands, GMRS (462–467 MHz), and scanner frequencies through 1090 MHz and above.
Connector orientation matters for this adapter: the SMA female end (center hole, external threads) connects to the SMA male pin on the radio's antenna port. The BNC female end accepts a BNC male plug — found on most scanner antennas, BNC-terminated mag-mounts, and BNC patch cables. This adapter does NOT have an SMA male end — it cannot be used to connect an SMA male cable to a BNC female port. For that configuration, an SMA male to BNC female adapter is needed instead.
Frequently Asked Questions
Yes. The Baofeng UV-5R has an SMA female antenna port (center hole). This adapter's SMA female end connects to the radio's SMA male antenna stub after removing the factory rubber duck. The BNC female end then accepts the BNC male connector on your mag-mount antenna cable. This is one of the most common uses for this adapter — it lets you use a vehicle rooftop mag-mount antenna with an SMA-port handheld without permanently modifying the radio or cable.
BNC connectors use a quarter-turn bayonet locking mechanism that connects and disconnects in under a second without thread engagement. SMA connectors require multiple thread rotations to seat and unseat. For operators who frequently switch between a portable rubber duck and an external antenna (such as when moving between vehicle and foot patrol), BNC adapters significantly reduce the time and attention required for antenna changes. BNC connections are also less prone to cross-threading damage than SMA in low-light or gloved-hand field conditions.
It is compatible with Kenwood and Yaesu models that use standard SMA female antenna ports — specifically those with a center hole in the antenna connector. Some Kenwood and Yaesu models use different connector standards (including proprietary connectors or SMA male ports). Verify your specific radio model's antenna connector type before ordering. The Baofeng UV-5R, UV-82, BF-F8HP, and Wouxun KG-UV8D all use standard SMA female ports and are directly compatible.
Yes. The TinySA has SMA female input ports. This adapter converts one of those ports to a BNC female, allowing BNC-terminated probes, antennas, or test cables to connect directly to the TinySA without a separate SMA-to-BNC adapter cable. This is useful when using oscilloscope probes or BNC-terminated signal sources with the TinySA for signal analysis work.
CCTV cameras, DVRs, and video distribution systems use BNC connectors at 75 ohm impedance. Ham radios and scanner receivers operate at 50 ohm. While the BNC connector shell is physically identical between 50 ohm and 75 ohm applications, connecting a 50 ohm device to a 75 ohm system through this adapter creates an impedance mismatch that degrades signal quality in video applications. For CCTV use, a 75 ohm BNC adapter is required. This adapter is designed exclusively for 50 ohm RF applications.
Having two adapters allows one to remain permanently installed on the radio while a spare is kept in a go-bag or vehicle kit. Adapters left permanently on a radio are subject to physical stress during normal use and can eventually wear or become damaged. A spare prevents having to field-expedient a solution when the primary adapter fails. For operators with two radios — a base unit and a portable — the 2-pack covers both simultaneously.
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