VHF Duplexer


VHF Duplexer

This VHF Duplexer allows a VHF transceiver to work in full duplex mode or simplex mode on one antenna. The duplex mode is controlled by the VHF transceiver, so that the duplexer can be selected or bypassed by coaxial relays.

Fully integrated inside a 19″ – 2U rack with optional power supply from 100/240 VAC – 50/60Hz (with +12VDC possibility) for easy installation. Basic LEDs on the front panel show local status indications.


The KDUP-4091 is a cavity high-power, base-station duplex filter for the 152-175MHz VHF frequency band with the following features:


  • Enlarged, full quarter-wavelength cavities with silver-plated, temperature compensated resonator elements
  • High Q's obtainable in these cavities enable filter to work with very narrow duplex spacing while keeping low insertion losses.
  • Duplex isolation is improved at medium spacing.