These are inductive loading coils for 80m. They can be used to extend the range of a half-size G5RV so it also covers 80m or to extend a 40m dipole to cover 80m as well. They are similar to the ones used on the DBD-4080 antenna.
They are also suitable for use with an inverted L cut for 40m to add 80m to it. All you need to do is add the coil to the end of your antenna and then add a short piece of wire for capacitive tuning.
They are priced per coil, for a dipole or doublet you will need two.
