An impedance transformer (9:1) 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. 300 watts
UNUN Balun 9:1 Type 61 core material giving extremely flat bandwidth.
Note these cores are expensive and beware cheap 9:1'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 and covered in taflon sleeve.
Sealed weatherproof box Usable Frequency Range 160m to 6m.
High Quality means paying for what you get Cheap = very inefficient = very hot.
Would you connect anything less to your expensive radio equipment.
We make 3 models : 300w, 600w ,1 Kw and 2Kw all use similar material coresWe offer good product customer support.