Yaesu FC-50 Automatic Antenna Tuner for FT-891 100W

The Yaesu FC-50 is a compact automatic antenna tuner designed specifically for use with the Yaesu FT-891 transceiver.

Microprocessor-controlled, the FC-50 responds directly to commands from the FT-891 and provides antenna impedance matching across the 160 metre to 6 metre amateur radio bands. It is a practical solution for fixed, mobile or portable operation with compatible antenna systems.

On HF, the tuner operates from 1.8 MHz to 29.7 MHz, with a matching impedance range of 16 Ω to 150 Ω, equivalent to approximately up to 3:1 SWR. On the 50 MHz band, it covers 50 MHz to 54 MHz, with a matching range of 25 Ω to 100 Ω, equivalent to approximately up to 2:1 SWR.

The FC-50 supports a maximum power of 100W, uses 4W to 60W for tune-up and completes tuning in 5 seconds or less, depending on the antenna conditions and the impedance presented to the tuner.

The unit includes 100 impedance matching memory channels, allowing previously used tuning data to be recalled quickly and helping speed up tuning on familiar frequencies. An internal cooling fan helps maintain thermal stability for the matching components inside the compact case.

The physical design allows the FC-50 to be installed directly underneath the Yaesu FT-891, creating a compact and integrated radio/tuner setup. For separate or mobile mounting, an additional bracket such as the MMB-82 may be required depending on the installation method.

Main features

• Automatic antenna tuner
• Brand: Yaesu
• Model: FC-50
• Designed specifically for the Yaesu FT-891
• Controlled directly by the transceiver
• Coverage: 160m to 6m
• Frequency range: 1.8–29.7 MHz + 50–54 MHz
• Input impedance: 50 Ω
• Maximum power: 100W
• Tune-up power: 4W to 60W
• Tune-up time: 5 seconds or less
• Impedance matching memories: 100 channels
• Internal cooling fan for thermal stability
• M-type / SO-239 coaxial connectors
• Dedicated control cable connector
• Input voltage: 13.8V DC ±15%, supplied from the transceiver
• Operating temperature: -10°C to +50°C
• Dimensions: 155 x 45 x 210.5 mm
• Approximate weight: 1.35 kg
• Compact integrated installation with the FT-891

Impedance matching range

• 1.8–29.7 MHz: 16 Ω to 150 Ω, up to approx. 3:1 SWR
• 50–54 MHz: 25 Ω to 100 Ω, up to approx. 2:1 SWR

Package contents

• Yaesu FC-50 automatic antenna tuner
• Coaxial cable for FT-891 connection, approx. 0.5 m
• Control cable, approx. 0.5 m
• 4 feet for FT-891 installation
• Mounting screws
• 2 joint plates
• 2 cushion adhesive tapes
• Installation manual

Recommended applications

• Use with Yaesu FT-891
• HF/50 MHz stations
• Mobile operation
• Portable operation
• Compact fixed stations
• Amateur radio on HF and 6m
• Compatible coax-fed antennas
• Operation from 160m to 6m
• Installations requiring automatic antenna matching

Important note

The Yaesu FC-50 should not be considered a universal tuner for any type of antenna. Long-wire antennas or antenna systems with impedance outside the specified ranges may not match correctly. For best performance, the antenna and coaxial cable should present impedance within the limits specified by the manufacturer.

Always switch the equipment off before connecting or disconnecting cables. Do not connect or disconnect the control cable or coaxial cable while transmitting. Do not place objects near the FC-50 ventilation ducts.