Duplexers

144/430 Duplexer - Schematics for a VHF UHF duplexer

Build a 2 meter duplexer - The duplexer is conservatively rated at 150 watts input, but it should withstand up to 300 watts.

A low cost UHF/VHF duplexer - Duplexers for dual band radio are usually high pass filter and low pass filter combined in the same box. This circuit is a design within a cost of US$10.

Diplexer design notes - Standard diplexer design is based on singly-terminated Butterworth filters.

AA5TB Antenna Coupler / SWR Bridge - Wire antennas requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (5000 ohms)

VHF-UHF Coupler - Home made V UHF coupler by IK0VWO in italian

144/430 Duplexer - Schematics for a VHF UHF duplexer

144/432MHz Homebrew Antenna Diplexers - VHF UHF diplexer by G8MNY

2 m 70 cm Diplexer - A 2m/440 diplexer

6m Duplexer project - 50 MHz Duplexer Project by NZ5V

A low cost UHF/VHF duplexer - Duplexers for dual band radio are usually high pass filter and low pass filter combined in the same box. This circuit is a design within a cost of US$10.

A Two Meter Duplexer - How to get a cheap-squeaky clean signal, a 2 meter duplexer designed by Leonard WB3AYW

AA5TB Antenna Coupler / SWR Bridge - Wire antennas requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (5000 ohms)

Antenna Coupler - Schematics of antenna couplers in french

Build a 2 meter duplexer - The duplexer is conservatively rated at 150 watts input, but it should withstand up to 300 watts.

Design 435/145 MHz diplexer filter - This example shows how SERENADE 8.7 can be used for help designing a contiguous lumped element diplexer by HA8ET

Diplexer - From Wikipedia, the free encyclopedia

Diplexer 2m 70cm - This DIPLEXER separates 2m from 70cm on the same coax cable, and allows to use 2 antennas over the same cable and permits transmission on one band and simultaneous receiption on the other band by hb9abx

Diplexer design notes - Standard diplexer design is based on singly-terminated Butterworth filters.

Diplexer for 2 m/70 cm - Article by Ing. Gyula Nagy, HA8ET

Diplexer for 2m and 70 cm - Schematics of a homebrewed diplexer for VHF and UHF in german

Duplex 144 432 - A full duplex antenna system for 144 432 Mhz

Duplexer for VHF and UHF - Duplexer to use two transceivers and one antenna VHF UHF in spanish

Duplexers: Theory and Tune Up - Basics on duplexersn type of duplexers and how duplexers works

Home Made duplexer - Homemade UHF/440Mhz Amateur Radio Repeater Duplexer

Homebewing couplers - This article explain how to build your own antenna coupler with pictures and schematics, in french

Homemade Diplexer - Make yourself a Diplexer

Homemade duplexer for 2 meter repeaters - QST Article by W1GAN

Mantaining Antenna Duplexers - Understanding, Maintaining & Re-Tuning Antenna Duplexers

MicroDuplexer - Learn a little bit about how duplexers work and building your own.

Six Meter Heliax Duplexer Construction - Duplexer capable of handling a high power 500khz split six meter repeater.

What's a diplexer? - It's a network that splits a signal to two or more loads, dependent on frequency. It is the simplest form of a multiplexer, which can split a signal into many different signal bands.