I have built a QMX Rev 2 and am having trouble with off-scale peaks in the SWR.? I've rewound T501 and T507.? I've found I can pretin the leads before I install the transformers.? I've been cleaning the board with 91% Isopropyl Alcohol and a brush around the soldering pads.? Last night I cleaned the whole board and the USB connection no longer worked. This morning I tried again and the USB port is working.? I am not used to working with SMD components.? Have I damaged the board using IPA?? I've ordered?MG Chemicals 4140A flux remover in hopes of cleaning the remaining residue.? What do you guys use or recommend?
