Hello, I can not get my K3 to transmit in Upper Sideband. Operation is fine when in the CW and LSB modes. However, when I go to USB, regardless of band, I seem to have no microphone gain or RF output. The K3 was functioning fine a couple of days ago, I assume that I "fat-fingered" one of the functions! Can anybody help me? TKS es 73, Tom, K8JRM