An impedance transformer (4:1) to feed a high impedance, end fed (unbalanced) random wire which is likely to be a few hundred ohms, and transform it into something closer to a 50Ω (unbalanced) coaxial input. 1 kW PEP
UNUN Balun 4:1 Type 43 core material giving extremely flat bandwidth.
Note these cores are expensive and beware cheap 4:1's will not perform as you expect.
Low Insertion Loss and exceptional match to 450 ohm right across all HF bands.
Stainless steel hardware.
Wire is Class H 212 Deg Celsius double coat enamel.
Sealed weatherproof box Usable Frequency Range 160m to 10
High Quality means paying for what you get Cheap = very inefficient = very hot.
Would you connect anything less to your expensive radio equipment.
We offer good product customer support.