Hardware Revison 3

A project log for VUHF Radio

A dual band VHF/UHF module based around two AX5043 radios. Built to work with HAM Radio communications using AFSK and G3RUH modulations.

NotBlackMagicNotBlackMagic 07/15/2020 at 19:310 Comments

The newest hardware revision, revision 3, arrived and I assembled and tested it over the last weeks. This revision fixes all the hardware errors and problems discovered with the revision 2 like the AX5043 Oscillator Input, analog output amplifier/filtering and in the power supply/distribution circuits.

The RF circuit, matching networks, were kept the same and this is reflected by the RF performance and input matching (S11) which are the same as with revision 2.

Besides that, the PCB color was changed to blue which in combination with no bodges looks much better and clean then the previous revision:

With this, I now have two assembled and working modules. This, with the antennas that arrived and where tested a few weeks ago, enables now communication testing between modules as well as range testing/comparison with different antennas and parameters.

Files for the new revision are available on my website.