Jim,? I think we need more details. Is this a QDX or QMX? You can't monitor 5 volt and 3 volt supplies in the serial app on the QDX, and you can only see the TCXO output. Also, what happened leading up to its untimely demise? Is this radio built for 9 volts or 12 volts and how are you powering it? What is your antenna setup??
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73, Dan - W2DLC
Daniel Conklin