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.
UNUN Balun 9:1 Type 43 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.
Sealed weatherproof box Usable Frequency Range 160m to 10m.
High Quality means paying for what you get Cheap = very inefficient = very hot.
Would you connect anything less to your expensive radio equipment.
Please note all boxes are now BLACK
We make 3 models : 300w, 600w ,1.0 kW, 2.0kW up to 5 kW all use similar material coresWe offer good product customer support.