Can I use a SGC Smartuner to tune a 50 ohm fed balanced style antenna?
Yes. SGC couplers can tune into any style HF antenna. Although primarily set up to work with end fed random length antennas (whips, longwire, loops, etc.), they can tune balanced dipole, beam, monobands, etc. To interface with a balanced antenna’s impedance, you should install the coupler as close to the antenna as possible or when necessary use a 300-600 ohm ladder line lead for interconnecting.
