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onelinkmore UHF Male to SMA Female Adapter 2 Pack, PL259 to SMA Jack RF Coax Connector for Baofeng UV-5R Handheld Radio SWR Meter Station SO239 Port
onelinkmore UHF Male to SMA Female Adapter 2 Pack, PL259 to SMA Jack RF Coax Connector for Baofeng UV-5R Handheld Radio SWR Meter Station SO239 Port
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--- QUICK SPEC REFERENCE --- Product: UHF Male (PL-259) to SMA Female Adapter SKU: OL0067-2X Connector A: UHF Male (PL-259) — external threads, center pin Connector B: SMA Female (Jack) — hole in center, external threads Style: Straight Body Material: Brass, Nickel Plated Center Contact: Gold Plated Dielectric: PTFE (Teflon) Impedance: 50 Ohm Quantity: 2 adapters per pack Price: $6.58 In Stock: Yes Typical Applications: Baofeng UV-5R to SWR meter, SDR dongle to base station antenna, SMA jumper cable to SO-239 equipment ---
This adapter converts a UHF female (SO-239) port into an SMA female port, or equivalently allows a PL-259 (UHF male) plug to connect to an SMA male device. The most common use case is connecting a Baofeng UV-5R or similar SMA-connector handheld radio directly to an SWR meter, antenna tuner, or base station antenna that has an SO-239 port — the UHF male end plugs into the SO-239, and the SMA female end accepts the radio's SMA male antenna port. It is also used to connect thin SMA-terminated coaxial pigtails (RG316, RG174) to UHF SO-239 jacks on CB radios, amplifiers, and base stations.
The brass body with nickel plating provides corrosion resistance for repeated use, and gold-plated contacts maintain low contact resistance across the adapter's service life. PTFE dielectric is stable at high temperatures, making this adapter suitable for use with higher-power HF and VHF transmitters without risk of dielectric deformation. At 50 ohm impedance, this adapter introduces no impedance mismatch between standard amateur radio and CB equipment. The 2-pack is useful for stations with multiple SWR meters or antenna switching setups.
Connector gender verification is critical before ordering. The UHF male (PL-259) end on this adapter has a center pin and external threads — it screws into an SO-239 female port. The SMA female end has a hole in the center and external threads — it accepts a standard SMA male plug (with center pin). This is NOT an RP-SMA adapter. If your handheld radio's antenna port has a hole in the center (RP-SMA male), a different adapter is required.
Frequently Asked Questions
Yes, this is one of the primary use cases. The Baofeng UV-5R has a standard SMA male antenna port (center pin). This adapter's SMA female end accepts that SMA male plug directly. The UHF male (PL-259) end then connects to the SO-239 port on most SWR meters, including the popular MFJ-822, Workman, and Diamond models. No additional cables or adapters are needed for a direct radio-to-meter connection.
PL-259 (UHF male) has a center pin and external threads that screw into the SO-239. SO-239 (UHF female) has a center socket and internal threads that receive the PL-259. This adapter has a PL-259 (male) end, so it plugs into any SO-239 (female) port on a radio, antenna, meter, or coaxial cable termination. The adapter converts that SO-239 connection into an SMA female port on the other side.
Yes. Most RTL-SDR and HackRF dongles have SMA male ports. Many outdoor HF wire antennas and active antenna preamplifiers terminate in SO-239 connectors. This adapter's SMA female end connects to the dongle's SMA male port, and the PL-259 end connects to the antenna's SO-239 feedpoint. For runs longer than a few feet, adding a coaxial cable between the adapter and the antenna is preferable to using the adapter as a direct mechanical support.
This adapter works with standard SMA male radios only — those with a center pin protruding from the antenna port. Baofeng UV-5R, UV-82, BF-F8HP, and most Kenwood, Yaesu, and Icom handhelds use standard SMA male. Some WiFi routers and certain Baofeng models use RP-SMA male (center hole). If your radio has a hole in the antenna port, you need an RP-SMA female to UHF male adapter instead.
The PTFE dielectric and gold-plated contacts make this adapter suitable for transmit use at typical amateur radio power levels on HF and VHF. For handheld transceiver use (typically 5–8W), there is no power handling concern. For higher power applications (100W+), ensure the adapter is fully seated and threads are engaged — a loose connection at any power level can cause arcing and RF burns. This adapter is not rated for continuous high-power duty cycle at amplifier output levels.
Ham radio operators frequently need the same adapter in multiple locations — one at the SWR meter, one at a secondary antenna port, or one kept as a field spare. CB radio installations with multiple coax runs may need the same conversion at several points. Having two adapters eliminates the need to unplug and move a single adapter between setups, which also reduces connector wear from repeated mating cycles.
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