Single (FDB / 101-N) or double (FDB / 102-N) coaxial cavity low power FM filter
Dual or single coaxial cavity in a high "Q" quarter wave with variable coupling. Installed between the transmitter and the antenna, a spurious-free output signal and perfect isolation from other emissions. Made of aluminum with insulating silver copper and PTFE internal lines, Rack 19 "- 3U version.