[Ian,Torrey]

We found why the second chassis wasn't working. In order to diagnose we first confirmed these new RF amplifiers were working by snipping the leads and powering it via a variable power source. A deflected beam was seen after AOM3. We tried a bunch of short testing and finally concluded that the the 5 pin power connector was rotated 90 degrees with respect to the original power cable (in that picture, original means the correctly functioning chassis, new means the newer one that was built that was not functioning correctly). This orientation doesn't have a preferred direction, but they do need to be the same. I believe we could fix this by quickly swapping the wires here and keeping this 90 rotation, but we decided to resolder this box to make it the same as the old one. This is better for the long term.

We plugged everything back in and now see a deflected beam on AOM3. The left side of the box is significantly under supplying the AOM (i.e. there is a deflected beam, but way less than the other side). We will diagnose this tomorrow.