TRX-SDR Switch Kit


20 in stock

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

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 boards:

  • ANT Switch (RF shielded and tested) – includes antenna relay and receive input limiter.
  • Audio Switch (tested) – includes also antenna relay control.
  • Barrel Power connector 1 pcs – plug 5.5/2.5mm
  • RCA male connectors – 2 pcs for antenna relay connection between two boards.

The user must prepare his own cables with specific connectors and lengths to connect the device to TRX and SDR . They are described in the user manual.

The Optional 3d printed compartment for the Audio Switch board is not included.


  • Allows the SDR and the TRX to use simultaneously the same antenna.
  • The Kit consists of two separate boards:
    • Audio Switch – also 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.