Just as a future word of warning, if you haven't already done so, make sure you have a real good ground on that board. The SSM2013 / SSM2018 VCA chips are easily damaged by static discharge. The last board I had which I brought from a broadcast group that went out of business would have a channel die about once a month until I replaced all the VCAs and made sure I had a very good ground. I suspect they had a faulty installation and the ICs were probably fatigued by past static discharges. Once I replaced all those VCAs the board was rock solid.