Usually going silent for a few seconds indicates a problem getting the signal from the studio to the transmitter, not a problem with the transmitter itself.
I heard they moved their studio a couple blocks east this spring, and that could explain it. But if the problem is still happening after several months it suggests either no one is paying attention or the money isn't there to implement a solution.
Edit: I should add, calling and complaining probably goes a long way with a small operator like this.