Image of 74-37-02A Duplexer



74-37-02A, 144-174 MHz, Duplexer

  • TX RX Systems offers a wide variety of Duplexer options to suit your application, including Vari-Notch®, Bandpass, and notch type circuits
  • Vari-Notch® design provides low loss and high isolation in a compact package
  • All high RF-current components silver-plated for highest performance
  • Various models to choose from to match your application.


Specifications for duplexers of unsymmetrical construction or response are listed as follows:

  • Isolation: Noise Suppression/Carrier Suppression
  • Insertion Loss: Tx Loss/Rx Loss




Product Specifications 
Item No74-37-02A
Item Name144-174 MHz, Duplexer
Frequency Range144-174 MHz
Minimum Freq Separation3.0 MHz
Power Rating400 W
Isolation57 dB
Insertion Loss1.35 dB
Number of Cavities4
Cavity Size6.625" Dia.
Impedance Ω50
Dimensions H x W x D33" x 19" x ± 7.5"
Tx-Rx Port ConnectorsN
Antenna ConnectorsN
Temperature Range-30 to +60 °C
Shipping Weight50 lbs.