Bryan,
It is not clear what tests you have completed from the video that passed.? I would also confirm that you are testing first with the QCX in "practice" mode so that no RF is feeding the amp, then going back and trying with RF supplied by the QCX.
As to IC1, did you measure the input pin to verify that it was getting voltage from Q4???
I would also confirm that you have power on the drains of the MOSFETs Q1 and Q2.??
I would check the gate to ground resistance with the power off and verify that it changes as you adjust R5.
Even with IC failed open, you should be able to do most of the tests in the video that do not require an oscilloscope.? You would not have much power amplification without the bias to the MOSFET gates.
The above are just suggestions.?
73
Evan
AC9TU
