UN14 II, 1:4 unun (50 Ω:200 Ω) + Choke balun

Impedance transformer (1:4 ratio) to transform a short wire (6 m minimum) or an aluminium tubing into a multiband antenna. Use with automatic or manual coupler recommended. It is the ideal solution to transmit during the week-end or the holidays. Version with integrated Choke-balun.