We'll use the term 'air core coil' to describe an inductor that does not depend upon a plastic or ferrite or iron
material to achieve its specified
inductance.
This covers the cases where there really is just air inside as well as windings upon a different insulator such as bakelite, glass or PTFE etc.
The wire used is self-adhesive copper wire,the wire will be bonded when heating ,then become an air core coil after winding.
Golden Eagle manufactures cylindrical or rectangular air core coils according to your unique specifications.
We have many experience in the production of self-bonding or self-supporting air core coils.