TRX-SDR Switch Kit


Out of stock

This Kit manages SDR/Transceiver audio paths and also allows your Transceiver (TRX) and Software Define Radio (SDR) to use simultaneously the same antenna.

Audio path switching: During receiving SDR or TRX audio can be selected. During transmitting TRX audio is selected.

ANT Switching: During receiving both the SDR and the TRX are connected to the common antenna. When the TRX starts transmitting, the SDR is disconnected and grounded.


In the box

Two separate modules:

  • ANT Switch (RF shielded and tested)
  • Audio Switch (tested)

Additional connectors:

  • (1x) Barrel Power connector plug 5.5/2.5mm
  • (3x) RCA male connector
  • (2x) Audio Jack Plug 6,3mm Stereo

The user must prepare own cables (with specific connectors and lengths) to connect the Kit to the TRX and SDR. For more info check the user manual.

The optional 3D printed enclosure for the Audio Switch board is not included.


  • Allows the SDR and the TRX to use simultaneously the same antenna and takes care of audio path switching.
  • The Kit consists of two separate boards:
    • Audio Switch – Does SDR/TRX audio path switching and also is responsible for controlling the ANT Switch.
    • ANT Switch – It is RF shielded and contains the antenna relay and receive input limiter.
  • TRX PTT from the TRX is used as a control signal.
  • During transmission, the TRX audio is selected.
  • During reception, either the SDR or the TRX audio can be selected.

Find out more about the Kit here.


Read more here.

Order, payment and shipping

For order and shipping info, please read our full Term of sale page


This kit (referred to as the Product) is not intended for professional use or other responsible applications. It is a hobby project and it is intended to be used by the amateur radio society. The specifications data are based only on measurements in the designer’s laboratory and model calculations. The designers and producers of this Product will make all the necessary efforts to ensure that the production fulfills the specifications. We do not guarantee that the documentation of this Product is free from unintentional errors. The antennas, the cables, the power supply and other equipment connected to the kit , which are built or supplied by the user should fulfill the requirements of the respective safety standards and legal regulations. Any damages or losses direct or indirect caused to any third party equipment when using the Product and its documentation are entirely the user’s responsibility. We are not responsible of malfunctions caused by any third party software and hardware that is used by the equipment connected to the Product.

All specification may contain errors and is subject to change without notice.

All photos are for demonstration purpose only. The actual product and used components might differ.