40mtr HomeBrew SDR

40 Metre SDR Receiver Kitset

Neville, ZL2BNE, a skilled homebrew radio builder has made up a very nice SDR kitset for you to build.
It’s limited to 40 mtrs due to the choice of the crystal, but of course, it being a home-brew design, feel free to change and experiment.
The kit is fully complete with all the cables and connectors (audio cable, 9V battery connector, BNC to 3.5mm adapter).
The audio output coming from the SDR goes into your computer which will be doing the hard work on processing the signals.

The design was first published in Break-In May / June 2024.
The receiver has quadrature outputs that are decoded by any computer software that supports I & Q inputs. The developer used HDSDR .

Here V3 built up, including all the connectors/cables supplied with the kit.

 

 

 

 

 

The following links detail the background and theory of operation, schematics, gerbers, and build guidelines.

  1. 1. Break-In May-June 2024
  2. A pic of a finished V3 SDR Built-up
  3. A pic of HDSDR in action  SDR at work
  4. 4. 40M SDR V3 Schematic
  5. 5. Photo Of Components
  6.  Rendering of board
  7. 7. 40M SDR I-BOM
  8. 8. 40M SDR Build Notes
  9. 9. 40M SDR Winding The Toroidal Transformer
  10. 10. 40M SDR Ver3a Gerbers