After taming some parasitic oscillation, the UDRX is now driving the Power Amplifier Module successfully. We’ll be optimizing the output filter and RX/TX switch next, which will require a minor board spin. Preliminary thermal analysis shows we’re in the ballpark for dissipation. We’ll have detailed analysis after the built-in monitoring is brought up and we evaluate Mitsubishi’s newer version of the module which has better shielding and thermals.
We still have a ways to go, but firing up the PA is a significant milestone.
Bryan – K7UDR