BTG/TX RX Systems manufactures a comprehensive line of Vari-Notch®, Series Notch® and Bandpass Duplexers with the critical specifications you require to operate a high performance system. Made up of simple filters, our duplexers provide the amount of isolation necessary, which is dependent on the TX to RX frequency separation, to filter out any transmitter noise and protect the receiver from the transmitter carrier overload.

Our Triplexer is the latest edition in our product line which is applicable to the Amateur Radio service. The design was based on the D-Star® radio system requirements in the 1.2 to 1.3 GHz band. Essentially a 3 input duplexer, the Triplexer allows combining the voice TX and RX channels onto a single antenna along with the simplex data only channel.

• Vari-Notch®, Series Notch® and Bandpass Duplexers
• Control Station Combiner Duplexers
• D-Star® Triplexers

Application Notes

• Everyone Needs Good Connections
• Insertion Loss in Band Pass Cavities

White Papers

• Duplexers and Repeaters - Some Basic Information

28-70-02A, 450-470 MHz, Duplexer		36-97-07053-A, 1.2-1.3 GHz, Triplexer
The 28-70-02A Duplexer; our most popular selling unit, provides 100 dB of isolation, with a 5 MHz split, and has a low insertion loss. The filters have bandpass characteristics which provide good out of band protection. Proven low loss and low noise construction is a key feature. 450-470 MHz Vari-Notch® design provides low loss and high isolation in a compact package All high RF-current components silver-plated for highest performance		The 36-97-07053-A Triplexer is the latest edition in our product line which is applicable to the Amateur Radio service. The design was based on the D-Star® radio system requirements in the 1.2 to 1.3 GHz band. Essentially a 3 input duplexer, the Triplexer allows combining the voice TX and RX channels onto a single antenna along with the simplex data only channel. This eliminates the need for a separate data channel antenna and feedline.