Triple Coaxial Cavity Filters in quarter wave high “Q” with variable coupling. Installed between transmitter and antenna provides an output signal free from spurious and a perfect isolation from other emissions. Made of aluminum with internal lines of silvered copper and PTFE insulators. These triple FM coaxial cavity filters have a B.W. command that allow you to adjust selectivity.
The Triple Band-Pass filter version guarantees a superb selectivity , ideal for systems with very close frequencies between them.