Worked on the Pi Radio today. Needed to do some soldering to create a 3.5 TS audio jack to a 2 pin connector for an amplifier. I used a Raspberry Pi as a 5v power source since it was just sitting at my desk. The audio jack is plugged into my computer speakers and is now playing sound through the speaker in the Emerson radio.
Next thing to do is make sure the code on the Raspberry Pi is working correctly and plug the audio jack into it. I will make final connections for the digital encoders and then take everything apart of repaint the casing. Getting very close. Here is a short video of some audio coming from the radio.